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GB/T 7494-1987 PDF English

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GB/T 7494-1987: Water quality. Determination of anionic surfactants. Methylene blue spectrophotometric method
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GB/T 7494-1987English279 Add to Cart 3 days [Need to translate] Water quality. Determination of anionic surfactants. Methylene blue spectrophotometric method

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Basic data

Standard ID GB/T 7494-1987 (GB/T7494-1987)
Description (Translated English) Water quality. Determination of anionic surfactants. Methylene blue spectrophotometric method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard Z16
Classification of International Standard 13.06
Word Count Estimation 8,859
Date of Issue 3/6/1987
Date of Implementation 8/1/1987
Issuing agency(ies) National Environmental Protection Agency
Summary This standard applies to the determination of drinking water, surface water, sewage and industrial wastewater low concentrations of methylene blue active substances, namely anionic surfactant. Under the experimental conditions, the measured object is mainly LAS, sodium alkyl sulfonates and fatty alcohol, but may have some positive and negative interference. When using 10mm pathlength cuvette sample volume is 100ml, the lowest concentration of the standard examination for 0. 05mg/L LAS, the detection limit of 2. 0mg/L LAS.

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