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Semi-volatile organic compounds analysis technology-leaching solution preparation sulfuric acid and nitric acid method

 Last Update: 2022-03-12
 Source: Internet
 Author: User

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moisture plant meter

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Take two samples, one for determination of moisture content, and the other for toxicity leaching experiment

Weigh 50～100g sample in a lidded container and dry it at 105℃.

Take an appropriate amount of a mixture of concentrated sulfuric acid and concentrated nitric acid with a mass ratio of 2:1 and add it to ultrapure water, measure the pH with a pH meter, and adjust the solution to make the pH 3.

Weigh 150～200g sample (the diameter of the sample should be less than 9.

Note: If the sample contains the initial liquid phase, it should be carried out first

The leachate is filtered by a high-pressure filter, and the filter membrane is made of disposable glass fiber membrane or microporous membrane (with a pore size of 0.

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