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Organic agricultural products: description of dithiocarbamate agents detected in organic agricultural products

Published: 2024-11-21 Author: mysheen
Last Updated: 2024/11/21, The retest results of 18 samples of dithiocarbamate in organic agricultural products show that you want to know? Let's take a look at it. Eighteen "dithiocarbamate agents" were detected in organic agricultural products in May 93.

The retest results of 18 samples of dithiocarbamate in organic agricultural products show that you want to know? Let's take a look at it.

In May 93, 18 samples of "dithiocarbamate" were detected in organic agricultural products. After the agricultural drug toxicology test of the Committee of Agriculture of the Executive Yuan, high performance liquid chromatography (HPLC) analysis was used to determine the residue of non-"dithiocarbamate".

2. From now on, the detection method of "dithiocarbamate" for cruciferous crops in organic agricultural products is still carried out by colorimetry and headspace sampling gas chromatography. The test results below 1ppm are temporarily regarded as undetected, and those higher than 1ppm are compared with the washed samples of the original samples. if there is no difference, they are also regarded as undetected and confirmed by high performance liquid chromatography (HPLC) if necessary.

Third, the existence of "glucosinolates" in some plants will cause interference in the test of "dithiocarbamate":

There are many kinds of glucosinolates (glucosinolates, or thioglucoside), and they have a common structure. That is, it has side chain R and sulfur atoms to connect D-glucose and thiohydroxamate-O-sulphate. Early sucrose? It is often named by a common name, but it was not systematically named until 1961, that is, the structure of the side chain R was added before the glucosinolates.

Due to the difference of side chain R, it is known that there are more than one hundred kinds of glucosinolates, which are commonly found in some plants, and most of them are Brassicaceae vegetables, such as heading Chinese cabbage, non-heading Chinese cabbage (rape, Qingjiang cabbage, kale, Chinese cabbage), cauliflower, cabbage, kale (turnip), turnip, mustard and so on. Carbon disulfide (CS2) is often released from cruciferous vegetables when acid is added, so it often interferes with the detection of dithiocarbamate fungicides.

 
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