Standard substance for morphological analysis of trivalent arsenic element and preparation method of standard substance
A technology of standard substance and element form, applied in the direction of analyzing materials, material separation, measuring devices, etc., can solve problems such as difficulty in storage, easy transformation, instability of arsenic standard substance, etc., and achieve the effect of accurate value and good stability
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[0036] Example one
[0037] A method for preparing standard materials for trivalent arsenic element speciation analysis, including the following steps:
[0038] Step S100, take the trivalent arsenic compound raw material, and select sodium arsenite, arsenic trichloride or arsenic trioxide. In this embodiment, sodium arsenite is selected and analyzed by high-resolution mass spectrometry and HPLC-ICP-MS The purity of the sodium arsenite in the raw material, specifically, the morphological structure of the sodium arsenite raw material is confirmed by high resolution mass spectrometry, and the purity of the sodium arsenite in the sodium arsenite raw material is analyzed by HPLC-ICP-MS.
[0039] In step S200, it is judged whether the sodium arsenite raw material contains other forms of arsenic element compounds except sodium arsenite; specifically, the morphological structure of the sodium arsenite raw material is confirmed according to the high resolution mass spectrometry method in step...
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