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微量氰离子的测定在环境监测中具有重要的意义。目前广泛采用的吡啶-联苯胺比色法的检测下限约1×10~(-6)M,灵敏度不够高。离子选择电极法具有许多优点,但检测下限亦仅约1×10~(-6)M。等发现,在乙二胺-镍络合物的硼酸盐缓冲溶液(pH≈9.2)中,当有氰离子存在时,于电位为-1.8伏(对SCE)处产生极谱催化波,可用于测定微量氰离子,但灵敏度仅10~(-6)M。后来进一步提纯试剂,用示波极谱法进行测定,
Determination of trace cyanide ions in environmental monitoring is of great significance. Currently widely used pyridine - benzidine colorimetric detection limit of about 1 × 10 ~ (-6) M, the sensitivity is not high enough. Ion selective electrode method has many advantages, but the detection limit is only about 1 × 10 ~ (-6) M. Found that in the ethylenediamine-nickel complex borate buffer solution (pH≈9.2), when a cyanide ion is present, a polar catalytic wave is generated at a potential of -1.8 volts (vs. SCE) In the determination of trace cyanide ions, but the sensitivity of only 10 ~ (-6) M. After further purification of reagents, determination by oscillopolarography,