Pretreatment method and detection method for detecting electrolyte organic solvent
A technology of organic solvents and detection methods, applied in the field of analytical chemistry, can solve the problems of reduced stability and accuracy of test results, damage to the stability of gas chromatographic column packing, and increased corrosion of gas chromatographs, so as to avoid quantification and stability Interference, reduced test costs, and easy operation
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[0076] Instruments and experimental medicines: pipettes, ion-exchange solid-phase extraction columns (DIKMA ProElut SAX), beakers, volumetric flasks, PET bottles, ethyl methyl carbonate solvent: content ≥ 99.99%, electrolyte (containing organic solvents : Dimethyl carbonate, diethyl carbonate, propylene carbonate, ethylene carbonate, ethyl propionate, vinylene carbonate, fluorobenzene, fluoroethylene carbonate, adiponitrile, succinonitrile, 1,3- propane sultone, 1,3,6-hexanetrinitrile).
[0077] (1) Sample pretreatment
[0078] Cartridge activation: Activate the SAX solid phase extraction column with ethyl methyl carbonate, and use a small beaker to collect the filtrate at the lower end of the cartridge, to be discarded.
[0079] Pass through the column: use a pipette to accurately pipette 1mL of electrolyte solution onto the small column, and collect the filtrate.
[0080] Elution: Then add ethyl methyl carbonate along the wall of the column tube for washing, wash 4-5 times...
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