Method for detecting sulfur dioxide residue limit of traditional Chinese medicinal material or traditional Chinese medicinal decoction tablet

Abstract

The invention discloses a method for detecting sulfur dioxide residue limit of a traditional Chinese medicinal material or a traditional Chinese medicinal decoction tablet. Lead acetate test paper is adopted for detection in the method. When the sulfur dioxide residue limit in the traditional Chinese medicinal material or the traditional Chinese medicinal decoction tablet is detected by the method disclosed by the invention, only the traditional Chinese medicinal material or traditional Chinese medicinal decoction tablet to be detected and a reagent are added, and the test paper is installed; the steps such as titration and instrument judgment are not needed; the operation is simple; the reaction time is short; and the sulfur dioxide residue limit can be fast and accurately measured, and the obtained detection result coincides with that of an official method. Meanwhile, the device adopted by the method is cheap and available; the price is lower than that of the official method; the used reagent is less; the operation is simpler; the method is suitable for the measurement of the sulfur dioxide residue limit by various people, and the wide popularization of the technique is highly facilitated.

Description

technical field [0001] The invention relates to a method for detecting the residual amount of sulfur dioxide in Chinese medicinal materials or Chinese medicinal pieces. Background technique [0002] Sulfur dioxide is easily converted into sulfite ions, and sulfite ions have strong reducing properties. When oxidized, the coloring substances can be reduced and faded, which has the effect of bleaching medicinal materials. It can also inhibit the oxidase in medicinal materials and prevent Chinese medicinal materials from browning. Change, block the normal physiological oxidation process of microorganisms, inhibit the reproduction of microorganisms, and thus play an antiseptic effect. Therefore, sulfur fumigation is widely used in the processing of Chinese herbal medicines such as Ophiopogon japonicus. However, if the residual amount of sulfur dioxide is too large, it can cause strong irritation to the human stomach and intestines, and can combine with thiamine in the blood, caus...

AI Technical Summary

Problems solved by technology

Although this method is more accurate in quantification, the device is more complicated, the price is higher, the chemical reagents used in the experiment are more, and nitrogen gas needs to be filled at the same time, the operation is more complicated, and the result needs to be converted by counting, which is not conducive to the General promotion of rapid detection methods in non-professional fields

With the continuous emergence and development of new methods and technologies in analytical science, new rapid detection technologies for sulfur dioxide residues, such as various sensors, have developed rapidly. However, many of the new rapid detection technologies are expensive and difficult to popularize.

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