Method for measuring zinc lactate content by measuring zinc content

Abstract

The invention discloses a method for measuring zinc lactate content by measuring zinc content, comprising the steps of carrying out a measurement experiment and a corresponding blank experiment on a zinc lactate test sample, and computing the zinc lactate content according to a volume difference of titration solution consumed in the two experiments and other data. The measurement experiment on the zinc lactate test sample comprises the following steps of taking the zinc lactate test sample, adding sulfuric acid solution till the zinc lactate test sample dissolves, adding water, ammonium fluoride solution, thiourea solution, ascorbic acid and uniformly mixing, adding acetic acid-sodium acetate buffer solution and xylenol orange indicating solution, titrating with ethylene diamine tetraacetic acid disodium standard titration solution till the color of the solution turning from red into bright yellow. By using the ammonium fluoride solution, the thiourea solution and the ascorbic acid to shelter metallic cations except zinc ions under the condition that the solution pH value is 5-6, the measurement of zinc ions has the advantages of higher degree of accuracy, simple and easy operation, and good reproducibility.

Description

technical field [0001] The invention relates to a method for testing the zinc lactate content, in particular to a method for testing the zinc lactate content by testing the zinc content. Background technique [0002] Zinc is an essential trace element for animals. As a component and cofactor of enzymes, it is related to the activities of more than 200 enzymes in animals, regulates and controls the structure and function of these enzymes, and affects various metabolic activities of the body. It has been proved that trace elements play a role in the animal body in the form of organic matter or chelate, rather than in the state of ions. Organic zinc has special physiological functions, higher bioavailability and good biochemical stability, which can improve the growth performance and reproductive performance of animals, reduce the damage of divalent zinc ions to vitamins, and reduce the emission of zinc ions. It is beneficial to environmental protection; at the same time, it w...

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Problems solved by technology

The problem of the above method is: many metal cations (such as Fe 3+ 、Al 3+ 、Cu 2+ , Hg 2+ etc.) can undergo a complex reaction with disodium edetate, and these metal cations are more or less present in chemicals, and it is no exception in the zinc lactate sample. After the reaction, these metal cations are calculated It is calculated as zinc ions, so the error of the zinc test will be larger (making the zinc content higher than the actual value), so that the test error of the zinc lactate content is larger (making the zinc lactate content higher than the actual value), which is not conducive to Promotion and industry standardization of zinc lactate content test method

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