Detection of braised pig offal cans

The national standard for food safety - Determination of chloride in food - Scope 1: This standard specifies the determination methods of chloride content in food, including potentiometric titration, indirect precipitation titration, and silver titration (molar or direct titration). The potentiometric titration method of this standard is applicable to the determination of chloride in various foods. The Volhard method (indirect precipitation titration method) and silver content method (molar method or direct titration method) in this standard are not applicable to the determination of chloride in dark colored food. After acidification treatment, acetone is added to the sample. The glass electrode is used as the reference electrode and the silver electrode is used as the indicator electrode. The chloride in the test solution is titrated with a silver nitrate standard titration solution. Determine the titration endpoint based on the "sudden jump" of the potential. Calculate the content of tampered substances in food based on the consumption of silver nitrate standard titration solution

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