GB/T 13200-1991: Water quality. Determination of turbidity

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Scope

1.1 This standard specifies two methods for determining turbidity in water. The
first part is the spectrophotometric method, which is applicable to drinking water,
natural water, high-turbidity water; the minimum detection turbidity is 3 degrees.
The second part is visual turbidimetry, which is applicable to low-turbidity water,
such as drinking water and source water; the minimum detection turbidity is 1
degree.
1.2 There shall be no debris and easily sinking particles in the water. If the
utensils used are not clean, OR there are dissolved bubbles and colored
substances in the water, it will interfere with the measurement.
Part 1 -- Spectrophotometry

Basic Data

Standard ID	GB/T 13200-1991 (GB/T13200-1991)
Description (Translated English)	Water quality. Determination of turbidity
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Z16
Classification of International Standard	13.06
Word Count Estimation	4,425
Date of Issue	8/31/1991
Date of Implementation	6/1/1992
Adopted Standard	ISO 7027-1984, NEQ
Issuing agency(ies)	State Bureau of Technical Supervision, State Environmental Protection Administration
Summary	This standard specifies two methods for measuring water turbidity. First spectrophotometry, suitable for drinking water, natural water and high turbidity water, minimum detectable turbidity of 3 degrees. The second visual turbidimetry, and water suitable for drinking water and other low-turbidity water, minimum detectable turbidity of 1 degree. Water should be free of debris and easy to sink particles as dirty utensils or water has dissolved bubbles and colored substances interfere with the determination.