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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
Standard Code | Standard Title | Standard Class | Order |
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GB/T 16886.18-2022 |
Biological evaluation of medical devices - Part 18: Chemical characterization of medical device materials in the risk management process 医疗器械生物学评价 第18部分:风险管理过程中医疗器械材料的化学表征 |
China National Standards Chemical |
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GB/T 16886.19-2022 |
Biological evaluation of medical devices - Part 19: PhysicoChemical, morphological and surface characterization of materials 医疗器械生物学评价 第19部分:材料物理化学、形态学和表面特性表征 |
China National Standards Chemical |
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GB/T 7739.8-2022 |
Methods for Chemical analysis of gold concentrates - Part 8: Determination of sulfur content 金精矿化学分析方法 第8部分:硫量的测定 |
China National Standards Chemical |
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GB/T 1289-2022 |
Chemical Reagent Sodium Oxalate 化学试剂 草酸钠 |
China National Standards Chemical |
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GB/T 17657-2022 |
Test methods for physical and Chemical properties of wood-based panels and veneered wood-based panels 人造板及饰面人造板理化性能试验方法 |
China National Standards Chemical |
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GB/T 42284.5-2022 |
Road vehicles - Environmental conditions and tests for electrical and electronic equipment used in electric vehicle drive systems - Part 5: Chemical loads 道路车辆 电动汽车驱动系统用电气及电子设备的环境条件和试验 第5部分:化学负荷 |
China National Standards Chemical |
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GB/T 33057-2022 |
Sampling method for waste Chemicals 废弃化学品取样制样方法 |
China National Standards Chemical |
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GB/T 42164-2022 |
Leather - Chemical tests - Determination of hexavalent chromium content under heat aging conditions 皮革 化学试验 热老化条件下六价铬含量的测定 |
China National Standards Chemical |
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GB/T 25915.15-2022 |
Clean rooms and related controlled environments - Part 15: Suitability assessment of equipment and materials by concentration of gaseous Chemicals 洁净室及相关受控环境 第15部分: 按气态化学物浓度评定设备及材料的适用性 |
China National Standards Chemical |
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GB/T 3396-2022 |
Determination of trace oxygen in ethylene and propylene for industrial use - ElectroChemical method 工业用乙烯、丙烯中微量氧的测定 电化学法 |
China National Standards Chemical |
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GB/T 41963-2022 |
Technical requirements for classification and collection of Chemicals used in waste vehicles 废弃车用化学品分类与收集技术要求 |
China National Standards Chemical |
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GB/T 20899.7-2022 |
Methods for Chemical analysis of gold ores - Part 7: Determination of iron content 金矿石化学分析方法 第7部分:铁量的测定 |
China National Standards Chemical |
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GB/T 22933-2022 |
Leather and furs - Chemical tests - Determination of free fatty acids 皮革和毛皮 化学试验 游离脂肪酸的测定 |
China National Standards Chemical |
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GB/T 7739.7-2022 |
Methods for Chemical analysis of gold concentrates - Part 7: Determination of iron content 金精矿化学分析方法 第7部分:铁量的测定 |
China National Standards Chemical |
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GB/T 42288-2022 |
Safety regulations for electroChemical energy storage power stations 电化学储能电站安全规程 |
China National Standards Chemical |
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GB/T 26416.5-2022 |
Methods for Chemical analysis of rare earth iron alloys - Part 5: Determination of oxygen content - Pulse-infrared absorption method 稀土铁合金化学分析方法 第5部分:氧含量的测定 脉冲-红外吸收法 |
China National Standards Chemical |
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GB/T 26416.4-2022 |
Methods for Chemical analysis of rare earth iron alloys - Part 4: Determination of iron content - Potassium dichromate titration method 稀土铁合金化学分析方法 第4部分:铁量的测定 重铬酸钾滴定法 |
China National Standards Chemical |
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GB/T 26416.3-2022 |
Chemical analysis methods of rare earth ferroalloys - Part 3: Determination of calcium, magnesium, aluminum, nickel, manganese content - Inductively coupled plasma emission spectrometry 稀土铁合金化学分析方法 第3部分:钙、镁、铝、镍、锰量的测 定 电感耦合等离子体发射光谱法 |
China National Standards Chemical |
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GB/T 26416.2-2022 |
Methods for Chemical analysis of rare earth ferroalloys - Part 2: Determination of rare earth impurity content - Inductively coupled plasma emission spectrometry 稀土铁合金化学分析方法 第2部分:稀土杂质含量的测定 电感耦合等离子体发射光谱法 |
China National Standards Chemical |
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GB/T 26416.1-2022 |
Chemical Analysis Methods of Rare Earth Ferroalloys Part 1: Determination of Total Rare Earth 稀土铁合金化学分析方法 第1部分:稀土总量的测定 |
China National Standards Chemical |
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GB/T 2910.4-2022 |
Textiles - Quantitative Chemical analysis - Part 4: Mixtures of certain protein fibers with certain other fibers (hypochlorite method) 纺织品 定量化学分析 第4部分:某些蛋白质纤维与某些其他纤维的混合物(次氯酸盐法) |
China National Standards Chemical |
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GB/T 12690.1-2022 |
Chemical analysis methods for non-rare earth impurities in rare earth metals and their oxides—Part 1: Determination of carbon and sulfur content—High frequency-infrared absorption method 稀土金属及其氧化物中非稀土杂质化学分析方法 第1部分:碳、硫量的测定 高频-红外吸收法 |
China National Standards Chemical |
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GB 15603-2022 |
General rules for warehouse storage of hazardous Chemicals 危险化学品仓库储存通则 |
China National Standards Chemical |
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GB/T 20899.8-2022 |
Methods for Chemical analysis of gold ores - Part 8: Determination of sulfur content 金矿石化学分析方法 第8部分:硫量的测定 |
China National Standards Chemical |
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GB/T 25915.13-2022 |
Cleanrooms and related controlled environments - Part 13: Surface cleaning to particle and Chemical cleanliness requirements 洁净室及相关受控环境 第13部分:达到粒子和化学洁净度要求的表面清洁 |
China National Standards Chemical |
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YY/T 1812-2022 |
Characterization of physical and Chemical properties of biodegradable biomedical metal materials 可降解生物医用金属材料理化特性表征 |
China Pharmaceutics Industry Standards Chemical |
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GB/T 41898-2022 |
Determination of corrosion resistance and compactness of coatings on inner walls of food metal containers-electroChemical method 食品金属容器内壁涂覆层耐蚀力和致密性的测定 电化学法 |
China National Standards Chemical |
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GB/T 4734-2022 |
Chemical analysis methods of daily-use ceramic materials and products 日用陶瓷材料及制品化学分析方法 |
China National Standards Chemical |
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GB/T 41800-2022 |
Information technology-sensor network-technical requirements for storage safety monitoring system of explosive hazardous Chemicals 信息技术 传感器网络 爆炸危险化学品贮存安全监测系统技术要求 |
China National Standards Chemical |
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GB/T 6488-2022 |
Liquid Chemical products - Determination of refractive index 液体化工产品 折光率的测定 |
China National Standards Chemical |
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GB/T 37211.3-2022 |
Methods for Chemical analysis of germanium metal - Part 3: Determination of trace impurity elements - Glow discharge mass spectrometry 金属锗化学分析方法 第3部分:痕量杂质元素的测定 辉光放电质谱法 |
China National Standards Chemical |
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YB/T 4997-2022 |
Rules for the use of calibration and quality control charts in spectroChemical analysis 光谱化学分析中的校验和质量控制图的使用规则 |
China Metallurgy Industry Standards Chemical |
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YB/T 6065-2022 |
Technical requirements for the treatment of circulating cooling water in the iron and steel industry ElectroChemical method 钢铁行业循环冷却水处理技术要求 电化学法 |
China Metallurgy Industry Standards Chemical |
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JB/T 5275-2022 |
Technical specifications for YE2-W, YE2-WF series outdoor and outdoor Chemical corrosion-resistant three-phase asynchronous motors (frame size 63~355) YE2-W、YE2-WF系列户外及户外化学防腐蚀型三相异步电动机技术规范(机座号63~355) |
China Machinery Industry Standards Chemical |
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GB/T 42273-2022 |
Zirconium compound Chemical analysis method Calcium, hafnium, titanium, sodium, iron, chromium, cadmium, zinc, manganese, copper, nickel, lead content determination Inductively coupled plasma atomic emission spectrometry 锆化合物化学分析方法 钙、铪、钛、钠、铁、铬、镉、锌、锰、铜、镍、铅含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Chemical |
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GB/T 13747.26-2022 |
Methods for Chemical analysis of zirconium and zirconium alloys - Part 26: Determination of alloys and impurity elements - Inductively coupled plasma atomic emission spectrometry 锆及锆合金化学分析方法 第26部分:合金及杂质元素的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Chemical |
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GB/T 42161-2022 |
ElectroChemical Performance Test of Lithium Iron Phosphate Test Method for First Discharge Specific Capacity and First Charge and Discharge Efficiency 磷酸铁锂电化学性能测试 首次放电比容量及首次充放电效率测试方法 |
China National Standards Chemical |
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GB/T 14352.24-2022 |
Methods for Chemical analysis of tungsten ore and molybdenum ore - Part 24: Determination of germanium content - Inductively coupled plasma mass spectrometry 钨矿石、钼矿石化学分析方法 第24部分:锗含量的测定 电感耦合等离子体质谱法 |
China National Standards Chemical |
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GB/T 42260-2022 |
Lithium iron phosphate electroChemical performance test cycle life test method 磷酸铁锂电化学性能测试 循环寿命测试方法 |
China National Standards Chemical |
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GB/T 6150.17-2022 |
Methods for Chemical analysis of tungsten concentrates - Part 17: Determination of antimony content - Atomic fluorescence spectrometry 钨精矿化学分析方法 第17部分:锑含量的测定 原子荧光光谱法 |
China National Standards Chemical |
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GB/T 41622-2022 |
Chemicals - Hornet acute oral toxicity test 化学品 大黄蜂急性经口毒性试验 |
China National Standards Chemical |
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GB/T 41671-2022 |
Chemical fibers - Determination of solvent residues 化学纤维 溶剂残留量的测定 |
China National Standards Chemical |
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GB/T 13747.18-2022 |
Methods for Chemical analysis of zirconium and zirconium alloys - Part 18: Determination of vanadium content - Benzoylphenyl hydroxylamine spectrophotometry and inductively coupled plasma atomic emission spectrometry 锆及锆合金化学分析方法 第18部分:钒含量的测定 苯甲酰苯基羟胺分光光度法和电感耦合等离子体原子发射光谱法 |
China National Standards Chemical |
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GB/T 41769-2022 |
CdZnTe Chemical analysis method - Determination of zinc and cadmium content - Inductively coupled plasma atomic emission spectrometry 碲锌镉化学分析方法 锌和镉含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Chemical |
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GB/T 41564-2022 |
Textiles - Quantitative Chemical analysis - Blends of aramid fibers with certain other fibers 纺织品 定量化学分析 芳香族聚酰胺纤维与某些其他纤维的混合物 |
China National Standards Chemical |
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GB/T 6150.13-2022 |
Methods for Chemical analysis of tungsten concentrates - Part 13: Determination of arsenic content - Atomic fluorescence spectrometry and DDTC-Ag spectrophotometry 钨精矿化学分析方法 第13部分:砷含量的测定 原子荧光光谱法和DDTC-Ag分光光度法 |
China National Standards Chemical |
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GB/T 13747.9-2022 |
Methods for Chemical analysis of zirconium and zirconium alloys - Part 9: Determination of magnesium content - flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry 锆及锆合金化学分析方法 第9部分:镁含量的测定 火焰原子吸收光谱法和电感耦合等离子体原子发射光谱法 |
China National Standards Chemical |
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GB/T 13747.10-2022 |
Methods for Chemical analysis of zirconium and zirconium alloys - Part 10: Determination of tungsten content - Thiocyanate spectrophotometry and inductively coupled plasma atomic emission spectrometry 锆及锆合金化学分析方法 第10部分:钨含量的测定 硫氰酸盐分光光度法和电感耦合等离子体原子发射光谱法 |
China National Standards Chemical |
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GB/T 21796-2022 |
Chemicals Activated sludge respiration inhibition test 化学品 活性污泥呼吸抑制试验 |
China National Standards Chemical |
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GB/T 21607-2022 |
Chemicals - Generation toxicity test method 化学品 一代繁殖毒性试验方法 |
China National Standards Chemical |
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GB/T 41623-2022 |
Chemicals Acute oral toxicity test for birds 化学品 鸟类急性经口毒性试验 |
China National Standards Chemical |
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GB/T 21604-2022 |
Chemicals Acute skin irritation/corrosion test method 化学品 急性皮肤刺激性/腐蚀性试验方法 |
China National Standards Chemical |
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GB/T 21606-2022 |
Chemicals Acute dermal toxicity test method 化学品 急性经皮毒性试验方法 |
China National Standards Chemical |
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GB/T 41667-2022 |
Chemical Soil column leaching test 化学品 土壤柱淋溶试验 |
China National Standards Chemical |
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GB/T 41668-2022 |
Chemicals - Determination of release rate of preservative treated wood to the environment 化学品 防腐处理的木材向环境释放速率的测定方法 |
China National Standards Chemical |
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GB/T 6150.2-2022 |
Methods for Chemical analysis of tungsten concentrates - Part 2: Determination of tin content - Potassium iodate titration and inductively coupled plasma atomic emission spectrometry 钨精矿化学分析方法 第2部分:锡含量的测定 碘酸钾滴定法和电感耦合等离子体原子发射光谱法 |
China National Standards Chemical |
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GB/T 14233.1-2022 |
Test methods for medical infusion, blood transfusion and injection equipment - Part 1: Chemical analysis methods 医用输液、输血、注射器具检验方法 第1部分:化学分析方法 |
China National Standards Chemical |
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RB/T 092-2022 |
Petroleum and Chemical industry - Quality management system requirements for oil and gas exploration enterprises 石油和化工行业 石油和天然气开采企业质量管理体系要求 |
China Certification and Accreditation Industry Standards Chemical |
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GB 24539-2021 |
Protective clothing—Chemical protective clothing 防护服装 化学防护服 |
China National Standards Chemical |
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GB 24539-2021 |
Protective clothing-Chemical protective clothing 防护服装 化学防护服 |
China National Standards Chemical |
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GB/T 11417.7-2012 |
Ophthalmic optics - Contact lenses - Part 7: Test methods for physical and Chemical properties "No. 1 Amendment" 眼科光学 接触镜 第7部分: 理化性能试验方法《第1号修改单》 |
China National Standards Chemical |
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GB/T 18916.10-2021 |
Norm of water intake—Part 10:Chemical pharmaceutical products 取水定额 第10部分:化学制药产品 |
China National Standards Chemical |
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YD/T 4042.2-2022 |
Big Data Platform for Smart Chemical Industry Park Part 2: Application Technical Requirements 智慧化工园区大数据平台 第2部分:应用技术要求 |
China Telecommunication Industry Standards Chemical |
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GB/T 41086-2021 |
General technical requirements for hazardous Chemicals security inspection equipments based on Raman spectrometry 基于拉曼光谱技术的危险化学品安全检查设备通用技术要求 |
China National Standards Chemical |
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HJ 1256-2022 |
Self-monitoring Technical Guidelines for Pollutant Discharging Units Traditional Chinese Medicine, Biopharmaceutical Products, and Chemical Preparation Manufacturing 排污单位自行监测技术指南 中药、生物药品制品、化学药品制剂制造业 |
China Environment Industry Standards Chemical |
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GA 1551.6-2021 |
Requirements for security and anti-terrorism prevention in the petroleum and petroChemical system Part 6: Oil and gas pipeline enterprises{译} 石油石化系统治安反恐防范要求 第6部分:石油天然气管道企业 |
China Security Industry Standards Chemical |
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YD/T 4042.3-2022 |
Big Data Platform for Smart Chemical Industry Park Part 3: Technical Requirements for Comprehensive Business Management 智慧化工园区大数据平台 第3部分:综合业务管理技术要求 |
China Telecommunication Industry Standards Chemical |
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YD/T 4042.1-2022 |
Big Data Platform for Smart Chemical Industry Park Part 1: Reference Architecture 智慧化工园区大数据平台 第1部分:参考架构 |
China Telecommunication Industry Standards Chemical |
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GB/T 5121.28-2021 |
Methods for Chemical analysis of copper and copper alloys—Part 28:Determination of chromium,iron,manganese,cobalt,nickel,zinc,arsenic,selenium,silver,cadmium,tin,antimony,tellurium,lead and bismuth content—Inductively coupled plasma-mass spectrometry 铜及铜合金化学分析方法 第28部分:铬、铁、锰、钴、镍、锌、砷、硒、银、镉、锡、锑、碲、铅和铋含量的测定 电感耦合等离子体质谱法 |
China National Standards Chemical |
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GB/T 41073-2021 |
Surface Chemical analysis -- Electron spectroscopies -- Minimum reporting requirements for peak fitting in X-ray photoelectron spectroscopy 表面化学分析 电子能谱 X射线光电子能谱峰拟合报告的基本要求 |
China National Standards Chemical |
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GB/T 31428-2021 |
Vocabulary relating to coal Chemical technology 煤化工术语 |
China National Standards Chemical |
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GB/T 29732-2021 |
Surface Chemical analysis—Medium resolution auger electron spectrometers—Calibration of energy scales for elemental analysis 表面化学分析 中等分辨俄歇电子能谱仪 元素分析用能量标校准 |
China National Standards Chemical |
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GB/T 41064-2021 |
Surface Chemical analysis—Depth profiling—Method for sputter rate determination in X-ray photoelectron spectroscopy, Auger electron spectroscopy and secondary-ion mass spectrometry sputter depth profiling using single and multi-layer thin films 表面化学分析 深度剖析 用单层和多层薄膜测定X射线光电子能谱、俄歇电子能谱和二次离子质谱中深度剖析溅射速率的方法 |
China National Standards Chemical |
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GB/T 23251-2021 |
Guideline for coal used in coal Chemical technology 煤化工用煤技术导则 |
China National Standards Chemical |
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GB/T 41039-2021 |
The general rules of determing designed coal and checked coal in modern coal Chemical technology 现代煤化工项目设计煤种和校核煤种确定通则 |
China National Standards Chemical |
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YD/T 4042.4-2022 |
Big Data Platform for Smart Chemical Industry Park Part 4: Technical Requirements for Platform Operation and Maintenance Management 智慧化工园区大数据平台 第4部分:平台运维管理技术要求 |
China Telecommunication Industry Standards Chemical |
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HJ 1257-2022 |
Chemical Substance Environmental Management Chemical Substance Testing Terminology 化学物质环境管理 化学物质测试术语 |
China Environment Industry Standards Chemical |
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AQ/T 3033—2022 |
Safety design management guidelines for Chemical construction projects{译} 化工建设项目安全设计管理导则 |
China Security industry Standards Chemical |
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SN/T 5290-2021 |
Quantitative Chemical analysis of the mixture of feather down and polyester fiber for import and export - Sodium hypochlorite method{译} 进出口羽毛绒与聚酯纤维混合物成分定量化学分析 次氯酸钠法 |
China Import&Export Inspection Industry Standards Chemical |
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SN/T 5295-2021 |
Basic Statistics Guide for Chemical Analysis Laboratories{译} 化学分析实验室基础统计指南 |
China Import&Export Inspection Industry Standards Chemical |
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GB/T 40980-2021 |
Determination of reducing sugar in bioChemical products—High-performance liquid chromatography with pre-column derivatization 生化制品中还原糖的测定 柱前衍生高效液相色谱法 |
China National Standards Chemical |
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GB/T 40640.3-2021 |
Informationalized management of Chemicals—Part 3:Electronic label application 化学品管理信息化 第3部分:电子标签应用 |
China National Standards Chemical |
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NB/T 10767-2021 |
Determination of Chemical constituents of lignocellulosic biomass raw materials - Part 4: Determination of soluble sugars{译} 木质纤维素类生物质原料化学成分的测定 第4部分:可溶性糖的测定 |
China Energy Industry Standards Chemical |
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GB/T 22930.1-2021 |
Leather and fur—Chemical determination of metal content—Part 1:Extractable metals 皮革和毛皮 金属含量的化学测定 第1部分:可萃取金属 |
China National Standards Chemical |
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GB/T 22930.2-2021 |
Leather and fur—Chemical determination of metal content—Part 2:Total metal content 皮革和毛皮 金属含量的化学测定 第2部分:金属总量 |
China National Standards Chemical |
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GB/T 12690.8-2021 |
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 8:Determination of sodium content 稀土金属及其氧化物中非稀土杂质化学分析方法 第8部分:钠量的测定 |
China National Standards Chemical |
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GA/T 1934-2021 |
Forensic Science Test of 6 ephedrines including norephedrine in suspected precursor Chemicals Gas chromatography-mass spectrometry, liquid chromatography and liquid chromatography-mass spectrometry 法庭科学 疑似易制毒化学品中去甲麻黄碱等6种麻黄碱类物质检验 气相色谱-质谱、液相色谱和液相色谱-质谱法 |
China Security Industry Standards Chemical |
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GA/T 1945-2021 |
Forensic Science Inspection of Common Inorganic Explosives and Their Explosive Residues Chemical Law 法庭科学 常见无机炸药及其爆炸残留物检验 化学法 |
China Security Industry Standards Chemical |
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GB/T 40640.5-2021 |
Informationalized management of Chemicals—Part 5: Chemicals data center 化学品管理信息化 第5部分:化学品数据中心 |
China National Standards Chemical |
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GA/T 1936-2021 |
Forensic Science Chemical Fiber Evidence Cross Section Shape Examination Microscopy 法庭科学 化学纤维物证横截面形状检验 显微镜法 |
China Security Industry Standards Chemical |
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GB/T 40795.1-2021 |
Chemical analysis method of lanthanum-cerium metals and their compounds—Part 1:Determination of cerium content—Ammonium ferrous sulfate titration method 镧铈金属及其化合物化学分析方法 第1部分:铈量的测定 硫酸亚铁铵滴定法 |
China National Standards Chemical |
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GB/T 40912-2021 |
Textiles—Quantitative Chemical analysis—Mixtures of polyesteramide with certain other fibers 纺织品 定量化学分析 聚酰胺酯纤维与某些其他纤维的混合物 |
China National Standards Chemical |
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GB/T 16399-2021 |
Methods for Chemical analysis of clay 黏土化学分析方法 |
China National Standards Chemical |
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GB/T 18115.4-2021 |
Chemical analysis methods of rare earth impurities in rare earth metals and their oxides -- Part 4: Determination of lanthanum, cerium, praseodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yt 稀土金属及其氧化物中稀土杂质化学分析方法 第4部分:钕中镧、铈、镨、钐、铕、钆、铽、镝、钬、铒、铥、镱、镥和钇量的测定 |
China National Standards Chemical |
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GB/T 40795.2-2021 |
Chemical analysis methods of lanthanum-cerium metals and their compounds—Part 2:Determination of rare earth content 镧铈金属及其化合物化学分析方法 第2部分:稀土量的测定 |
China National Standards Chemical |
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GB/T 40798-2021 |
Chemical analysis method of ion-adsorption rare earth ore—Determination of total rare earth contents—Inductively coupled plasma mass spectrometry 离子型稀土原矿化学分析方法 稀土总量的测定 电感耦合等离子体质谱法 |
China National Standards Chemical |
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GB/T 12690.4-2021 |
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 4: Determination of oxygen and nitrogen contents—Impulse-infrared absorption and impulse-thermal conductivity method 稀土金属及其氧化物中非稀土杂质化学分析方法 第4部分:氧、氮量的测定 脉冲-红外吸收法和脉冲-热导法 |
China National Standards Chemical |
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GB/T 40640.1-2021 |
Informationalized management of Chemicals—Part 1: Data exchange 化学品管理信息化 第1部分:数据交换 |
China National Standards Chemical |
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GB/T 40640.2-2021 |
Informationalized management of Chemicals—Part 2:Information security 化学品管理信息化 第2部分:信息安全 |
China National Standards Chemical |
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GB/T 40640.4-2021 |
Informationalized management of Chemicals—Part 4:General specification for chemicals positioning system 化学品管理信息化 第4部分:化学品定位系统通用规范 |
China National Standards Chemical |
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