Using ion chromatography valve switching technology to eliminate the influence of high concentration of chloride ions, the bromide and sulfate in high-purity potassium chloride were analyzed. The bromide ion content was 0.0001438%, and the sulfate content was 0.0000384%.

Using a dynamic range conductivity detector, high concentration of chloride ions and low concentration of other ions can be analyzed at the same time.

condition:

Ion chromatography: RPIC-2017

Detector: dynamic range conductivity detector

Flow rate: 1.0mL/min

Suppressor: WLK-8A

Eluent: 20mM KOH isocratic

Current: 60mA

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序號(hào)   保留時(shí)間 名稱    濃度(mg/L) 峰面積     

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1      7.947    Br-1    0          1836842    

2      10.753   SO4-1   0          1784109    

3      19.728   Br-2    0.15       2800396    

4      22.538   SO4-2   0.04       2960496    

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經(jīng)計(jì)算，氯化鉀中溴離子含量為143.8mg/Kg，0.0001438%，硫酸鹽含量為38.4mg/Kg，0.0000384%。

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