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Cr(Ⅵ)在NH_4OH-NH_4Cl-NaNO_2-8-氨基喹啉-5-偶氮-对苯磺酸钠(AQAPS)体系中产生一灵敏的阴极极化二次导数催化波,其峰电位在-1.33V(vs.SCE)。Cr(Ⅵ)在0.40～12.0ng/ml范围内与峰电流成正比。本法巳用于废水中Cr(Ⅵ)的测定,结果良好。
A sensitive cathode polarization second derivative catalytic Cr (Ⅵ) was produced in NH_4OH-NH_4Cl-NaNO_2-8-Amino-quinoline-5-azo-benzene sulfonate (AQAPS) 1.33V (vs.SCE). Cr (Ⅵ) is proportional to the peak current in the range of 0.40 ~ 12.0ng / ml. This method has been used for the determination of Cr (Ⅵ) in wastewater with good results.