Optimization Study of Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry for the Detection of Six Arsenic Species in the Songhua River
Hexavalent arsenic forms have become a focus of monitoring due to their high toxicity,while research on other arsenic forms is also indispensable.In this study,the high-performance liquid chromatography-inductively coupled plasma mass spectrometry(HPLC-ICP-MS)was optimized for the detection of six arsenic species in the Songhua River,a rapid and accurate detection technique was established.The results showed that selecting ammonium dihydrogen phosphate as the mobile phase enabled the separation of the six arsenic species,and the separation time decreased with the increase of mobile phase concentration.The optimal pH for separation was found when the pH was between 6 and 8.The detection limits for As(Ⅲ),As(Ⅴ),AsB,MMA,DMA,and AsC were determined to be 0.113 μg/L,O.194 pg/L,0.167 μg/L,0.225 pg/L,O.273 pg/L,and 0.146 μg/L,respectively.Recovery tests and method validation were conducted on actual water samples to ensure the accuracy and reproducibility of the analysis process.The optimized method allowed for the effective separation and detection of the six arsenic species within 25 minutes,with detection limits lowered to the nanogram level,meeting national environmental standards.Through systematic optimization of the detection method,HPLC-ICP-MS technology can play a crucial role in arsenic environmental monitoring and risk assessment,while also expanding the possibility of applying this method to on-site rapid detection.
the Songhua Riverarsenic formmethod optimizationenvironmental monitoring
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NSTL
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