GB/T 11893-1989: Water quality. Determination of total phosphorus. Ammonium molybdate spectrophotometric method

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Scope

This standard specifies the method of using potassium persulfate (or nitric acid-
perchloric acid) as the oxidant to digest the unfiltered water sample and using
ammonium molybdate to determine the total phosphorus with spectrophotometry.
Total phosphorus includes dissolved, particulate, organic and inorganic phosphorus.
This standard applies to surface water, sewage, and industrial wastewater.
Take 25 mL sample; the minimum detectable concentration of this standard is 0.01
mg/L, and the upper limit of determination is 0.6 mg/L.
Under acidic conditions, arsenic, chromium, and sulfur interfere with the determination.

Basic Data

Standard ID	GB/T 11893-1989 (GB/T11893-1989)
Description (Translated English)	Water quality. Determination of total phosphorus. Ammonium molybdate spectrophotometric method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Z16
Classification of International Standard	13.060.01
Word Count Estimation	5,515
Date of Issue	11/3/1989
Date of Implementation	7/1/1990
Issuing agency(ies)	State Bureau of Technical Supervision
Summary	This standard specifies the potassium persulfate (or nitric - perchloric acid) as the oxidant, the unfiltered water sample digestion with ammonium molybdate spectrophotometric method for the determination of total phosphorus. TP comprises dissolving the particles, organic and inorganic phosphorus. This standard applies to surface water, sewage and industrial wastewater. Take 25mL sample, the standard minimum detectable concentration of 0. 01mg/L, measured a maximum of 0. 6mg/L. Under acidic conditions, arsenic, chromium, sulfur interfere.