2022-02-23АЙИ
HJ 537-2009 Replacing GB 7478-87 Water Quality-Determination of Ammonia Nitrogen-Distillation-Neutralization Titration
2022-02-23АЙИ
GB 12997-91 Technical regulation for design of water quality sampling scheme
2022-02-23АЙИ
HJ/T 347-2007 Water quality-Determination of fecal coliforms-Multi-tube fermentation method and membrane filter method
2022-02-23АЙИ
HJ/T 341-2007 Water quality-Determination of mercury-Cold atomic fluorescence method
2022-02-23АЙИ
HJ/T 399-2007 Water quality-Determination of chemical oxygen demand-Rapid digestion spectrophotometry
2022-02-23АЙИ
HJ/T 196-2005 Water quality-Determination of Kjeldahl nitrogen-Gas molecular absorption spectrometry
2022-02-23АЙИ
HJ/ 342-2007 Water quality-Determination of sulfate-Barium chromate spectrophotometry
2022-02-23АЙИ
HJ/T 343-2007 Water quality-Determination of chloride-Mercury nitrate titrimetric method
2022-02-23АЙИ
HJ/T 344-2007 Water quality-Determination of manganese-Formaldoxime spectrophotometry
2022-02-23АЙИ