HJ 828-2017: Water quality - Determination of the chemical oxygen demand - Dichromate method

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Scope

This Standard specifies the dichromate method for determining chemical
oxygen demand in water.
This Standard applies to the determination of chemical oxygen demand in
surface water, domestic sewage and industrial wastewater. This Standard does
not apply to the determination of chemical oxygen demand in water, of which
the chloride concentration is greater than 1000 mg/L (after dilution).
When the sampling volume is 10.0 ml, the detection-limit of this method is 4
mg/L, and the lower limit of determination is 16 mg/L. The upper limit of
determination of undiluted water samples is 700 mg/L; when the limit is
exceeded, the determination shall be made after dilution.

Basic Data

Standard ID	HJ 828-2017 (HJ828-2017)
Description (Translated English)	Water quality - Determination of the chemical oxygen demand - Dichromate method
Sector / Industry	Environmental Protection Industry Standard
Classification of Chinese Standard	Z16
Word Count Estimation	12,174
Date of Issue	4/25/2017
Date of Implementation	6/1/2017
Older Standard (superseded by this standard)	GB/T 11914-1989
Regulation (derived from)	Ministry of Environment Protection Announcement 2017 [16]
Issuing agency(ies)	Ministry of Ecology and Environment