NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
HJ 670-2013
水質 磷酸鹽和總磷的測定 連續流動-鉬酸銨分光光度法 Water quality. Determination of orthophosphate and total phosphorus. Continuous flow analysis(CFA) and Ammonium molybdate spectrophotometry
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The Standardization Administration of the People's Republic of China