CrCL3, CrNano, Cr piconiate (CrPic) and Cr nicotinate (CrNic) were dissolved to different concentration as 100,200,400,800,1600 ppb in 0.9% NaCl solution.

 
  • 将氯化铬、纳米铬、吡啶羧酸铬和烟酸铬分别配制成5个浓度梯度:100、200、400、800、1000ppb,调节溶液Ph值到8.;5后,测定溶液中铬浓度。
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