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在HNO_3介质中,有乙醇存在下,以Fe~(3+)—SCN~-—OP体系测定唾液中SCN~-,可以较客观地反映由于吸烟及其它途径进入人体内的氰化物水平。方法的相对标准偏差为1.9％～5.1％,样品加标回收率为92％～109％。0～100μgSCN~-/10ml符合比尔定律,ε′=4.5×10~3L·mol~(_-1)·cm~(-1),最低检出量为1.28tμg。络合物的颜色可稳定8h。测定样品获得了满意的结果。
In HNO_3 media, the presence of ethanol in the presence of Fe ~ (3 +) - SCN ~ - OP system in saliva SCN ~ - can more objectively reflect the smoking and other ways into the body of cyanide levels. The relative standard deviation of the method was 1.9% ~ 5.1%, and the spiked recoveries were 92% ~ 109%. Beer’s law was obeyed at 0 ~ 100μgSCN ~ - / 10ml, ε ’= 4.5 × 10 ~ 3L · mol ~ (_-1) · cm ~ (-1) and the minimum detectable amount was 1.28tμg. Complex color can be stable 8h. The sample was measured to obtain satisfactory results.