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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/Z 41259-2022 |
Determination of quaternary ammonium salt in preservative wood and wood preservatives by automatic potentiometric titration {译} 自动电位滴定仪测定防腐木材和木材防腐剂中季铵盐的方法 |
China National Standards Determination quaternary ammonium |
 English PDF |
| GB/T 39873-2021 |
Determination of quaternary ammonium salt in disinfectant—Liquid chromatography-tandem mass spectrometry 消毒剂中季铵盐的测定 液相色谱-串联质谱法 |
China National Standards Determination quaternary ammonium |
English PDF |
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