建设用地土壤中六价铬的测定方法研究

Study on the Determination Method of Hexavalent Chromium in Soil of Construction Land

六价铬对土壤的污染会导致土壤质量下降,影响到生态环境。研究针对建设用地土壤中的六价铬测定问题,提出了一种结合等离子体质谱的化工类测定方法。过程中对土壤中六价铬的浸提操作进行了设计,引入缓冲溶液消除三价铬的干扰,使用等离子体质谱分析仪作为检测仪器,并设计了完整的测定流程。实验结果表明,研究方法的测定下限达到0.280 mg/kg,研究方法在12个样本中的测定结果波动范围保持在1.2 mg/kg以内;说明研究方法能够有效完成土壤中六价铬的测定,能够为环境保护提供一定的化工技术参考。

The pollution of hexavalent chromium on soil can lead to a decrease in soil quality and affect the ecological environment.A chemical determination method combining plasma mass spectrometry has been proposed for the determination of hexavalent chromium in soil for construction purposes.During the process,the extraction operation of hexavalent chromium in soil was first designed,followed by the introduction of a buffer solution to eliminate the interference of trivalent chromium.Then,a plasma mass spectrometry analyzer was used as the detection instrument,and a complete determination process was designed.The experimental results indicate that the detection limit of the research method reaches 0.280 mg/kg.The fluctuation range of the measurement results of the research method in 12 samples remains within 1.2 mg/kg.This indicates that the research method can effectively determine hexavalent chromium in soil and provide certain chemical technology references for environmental protection.