非分散型真空紫外水銀分析計の試作

概要

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A KBr-coated photocell has been evaluated as a detector of a non-dispersive vacuum ultraviolet(VUV) atomic absorption spectrophotometer for mercury. The photocell shows high quantum yield in the VUV region, and lower quantum yield in the UV region of longer wavelength. This characteristics of the photocell provides selective detection of the Hg I 185.0nm line, which is more sensitive in mercury atomic absorption than the Hg I 253.7 nm line, and allows to build a non-dispersive measurement system. The sensitivity (1% absorption) and detection limit (concentration corresponding to S/N=2) were 0.26 ng and 0.043 ng, respectively, using a 30cm (length) absorption cell. The detection limit may be improved by the use of a logarithmic amplifier and by reduction of dark current in the system.
社団法人日本分析化学会の論文
1980-05-05