Method for detecting sulfur dioxide content in shitake mushrooms

Abstract

The invention discloses a method for detecting sulfur dioxide content in shitake mushrooms, which comprises the following steps of: 1) preparing standard solution, namely preparing standard stock solution from anhydrous sodium sulfite, formaldehyde solution, NaOH solution, and deionized water, preparing the standard stock solution into the standard solution at step concentration , filtering, injecting by adopting ion chromatography, and drawing a standard curve according to the concentration and peak appearance area; 2) treating samples, namely taking dried shitake mushrooms as samples, injecting the obtained supernatant by adopting ion chromatography, substituting the peak appearance area obtained under the same peak appearance time in the step 1) into the standard curve obtained in the step 1), and obtaining sulfur dioxide content c of the injected solution; and 3) obtaining the sulfur dioxide content in the shitake mushrooms. The method for detecting the sulfur dioxide content in the shitake mushrooms has the characteristics of accurate result and convenient use.

Description

technical field The invention relates to a method for detecting sulfur dioxide content in shiitake mushrooms, in particular to a method for detecting SO in shiitake mushrooms based on ion chromatography technology. 3 2- detection method. Background technique Lentinus edodes (Berk.) sing), also known as flower mushroom, Xiangxin, Shiitake, winter wild mushroom, thick mushroom, flower mushroom, is the second largest edible fungus in the world and one of my country's special products. It is known as "mountain mushroom" among the people. Jane [1] . my country's shiitake mushroom export trade volume has gradually increased in the past 10 years, with an annual increase rate of about 2%. At present, China's annual output of shiitake mushrooms is 80,000 tons, accounting for more than 80% of the global 100,000 tons, ranking first in the world; exports are 36,000 tons tons, also ranking first in the world's mushroom exporter. However, in fact, my country’s dried shiitake mushrooms ...

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