鉄鋼分析のスキルフリー化を志向したミスト-気相接触化学発光反応を用いる硫黄の簡便かつ高感度な検出システムの試作

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In relation to a skill-free technology in steel analysis, a new mist-gas phase chemiluminescent detection system for sulfur was devised to be coupled with a flow injection technique. The proposed system was composed of two manifolds of 8.0×10^<-4>M KMnO_4 and 1.0×10^<-4>M riboflavine phophate at pH 2.5 adjusted with H_2SO_4 and H_2S in N_2 balance and a chemiluminescent detection system. The reaction cell was made by a spherical glass flask of about 100mm i.d.. An outlet of the spherical glass was connected with the nebulizer system, which was constructed by the triplicate tubing system of 0.5mm i.d. brass, 5mm i.d. pyrex glass having 0.8mm i.d. at the edge and 4.5cm i.d. vinyl chloride at the inside in order. The analysis was performed by a 5 sec injection of the chemiluminescent reagents at 10 ml/min into the continuous H_2S sample flow at 7.5 l/min. Sulfur content was indirectly determined in terms of that of H_2S. The chemiluminescent reaction scheme of H_2S was supposed to be same as in that of SO_2. In the optimized operating condition, the lower detection limit was 0.5ppm and a calibration for the determination was linear between 0.5 ppm and 3.0 ppm. A reproducibility of the determination was less than 1% in terms of RSD at more than 10 repeating runs in 0.5ppm, 1.0ppm and 2.0ppm H_2S concentrations. Analytical time required was less than 10 s for one sample. Their analytical figure of merits were usable for the skill-free grade technique in future.
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鉄鋼分析のスキルフリー化を志向したミスト-気相接触化学発光反応を用いる硫黄の簡便かつ高感度な検出システムの試作

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鉄鋼分析のスキルフリー化を志向したミスト-気相接触化学発光反応を用いる硫黄の 簡便かつ高感度な検出システムの試作

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鉄鋼分析のスキルフリー化を志向したミスト-気相接触化学発光反応を用いる硫黄の簡便かつ高感度な検出システムの試作