Study on Rapid Detection Method of Potassium Chloride Purity for Drilling Fluid
At present,the quality inspection standard GB/T 7118-2008 is implemented for potassium chloride products used in drilling fluid in the petroleum industry.This standard method has some problems such as low efficiency,high cost and strong reagent toxicity.In this paper,a new rapid detection method of potassium chloride purity-ICP-OES method is developed,and the detection accuracy and efficiency are further improved by optimizing and adjusting instrument parameters,weighing and transferring steps of sample solution in the preparation process,mixing the preparation concentration of standard solution with the injection concentration of impurity ions,and the storage container of standard solution.The optimized ICP-OES method was applied to the determination of potassium chloride content.Compared with the standard method,the relative standard deviation of the results was reduced by 0.03%,and the detection efficiency was increased by 5 times.The detection process takes water as the solvent and does not involve any toxic and harmful reagents.
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