Determination of Fluorides in the Air of Inorganic Chemistry Laboratory Environment by Ultrasonic Elution Ion Chromatography
Ultrasonic elution was used to improve the sample pretreatment of hydrochloric acid extraction and filter paper crushing into pulp in the Determination of Fluorides in Workplace Air Toxic Substances(GBZ/T160.36).Ion chromatography was used to simplify the analysis process and improve efficiency.The method validation was conducted using the ambient air of the inorganic chemistry laboratory as the sample collection object.The results showed that the detection limit of the method was 0.01 mg/L,and the minimum detected mass concentration was 0.02 mg/m3.Seven parallel measurements were conducted on the samples,with relative standard deviations of 0.29%and 0.57%,both of which were lower than the average relative standard deviation of 4.6%in GBZ/T 160.36.Comparing the determination of different concentrations of standard quality control samples with the electrode method,the relative errors of both methods are less than 10%,and this method is smaller than the electrode method.
NETL
NSTL
万方数据
