China Drying Network Co., Ltd. was officially approved by the State General Administration of Quality Supervision as the national first-class standard by the Ecological Environmental Assessment and Analysis Research Group of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences. substance. This indicates that in the future, the detection of 34 common pollutants in biological samples in China will have a uniform scale.
For a long time, the standard substance of polychlorinated biphenyls and organochlorine pesticides in China's benthic organisms has been blank, while the foreign standard materials of the same category are basically monopolized by the United States and the European Union and other countries. The standard substance developed by Dalian Institute of Chemicals belongs to the subproject of the national “863†project. The standard substance is developed using sea red (scientific name "Mussel") which has a bioconcentration effect on target pollutants. The set value measurement method used is currently the most authoritative and most accurate isotope dilution high resolution mass spectrometry in the world. Method, and each set is priced at only 1/10 of the international price.
According to the researchers of the research group, the so-called national standard substance is a measuring instrument similar to a balance. It is mainly used to calibrate the instrument and evaluate the measurement method to ensure the measurement results are consistent. At present, each laboratory in our country has its own detection method system, so the detection results of the same substance and the detection results of different testing organizations may show a wide gap. Therefore, there is an urgent need for a unified and authoritative method of measuring the scale.
The detection target of the standard substance developed by Dalian Institute of Chemical Industry includes 16 kinds of PCBs and 18 types of organochlorine pesticides. Some of the target compounds such as BHC and DDT are pesticides that the country has banned, and these compounds are also added by our country. The Stockholm Convention has been required to focus on the monitoring of persistent organic pollutants. However, due to the lack of reference materials, the level of detection of such pollutants has been limited.
The researchers told reporters that this standard substance covers a wide range of target compounds and can be used for the detection of organochlorine pesticides and polychlorinated biphenyls in biological samples such as shellfish, fish and shrimp, and meat. If standard methods are used to evaluate and calibrate the test methods in the future, there will be no longer a wide gap between the test results of the same substance.
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