Ion chromatography-online pretreatment analysis system for determining heavy metal chromium (VI) in donkey-hide gelatin
A technology of ion chromatography and analysis system, applied in the direction of analyzing materials, measuring devices, material separation, etc., can solve the problems of inability to detect chromium content, etc., achieve the effects of reducing sample pretreatment process, shortening sample analysis time, and good selectivity
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[0029] The present invention uses Dionex ICS-2100 ion chromatograph equipped with EG eluent generator, Dionex Ultimate 3000 variable wavelength UV-visible detector, Dionex Ultimate 3000 quaternary gradient pump, and Shimadzu LC-9A infusion pump to realize heavy metal chromium in Ejiao ( Ⅵ) Determination. The pretreatment column, guard column 1, guard column 2, analytical column, etc. are connected to the Dionex ICS-2100 ion chromatograph in order.
[0030] The operation steps of the ion chromatography-online pretreatment analysis system for the determination of heavy metal chromium (Ⅵ) in Ejiao are as follows:
[0031] (1) Sample loading: such as figure 1 , The sample is injected into the quantitative loop, the six-port valve is in the Load state, and the ten-port valve is in the A state. Quaternary gradient pump provides online pre-eluent balance online pretreatment column, and the ion chromatograph has its own pump to provide eluent balance guard column 1, guard column 2 and ana...
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