NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
HJ 546-2009
環境空氣 五氧化二磷的測定 抗壞血酸還原-鉬藍分光光度法(暫行) Ambient air. Determination of phosphorus pentoxide. Molybdenum blue ascorbiaccid to deoxidize spectrophotometric method
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The Standardization Administration of the People's Republic of China