酚藏花红共振散射光谱法测定水中痕量亚氯酸根
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摘要
在盐酸介质中,亚氯酸根能氧化I~-为I_2,过量的I~-与I_2形成I_3~-,酚藏花红能与I_3~-反应生成纳米缔合物,缔合物在320 nm处产生共振散射效应,据此建立了一种共振散射光谱法测定ClO_2~-的新方法。探讨了碘化钾和酚藏花红用量等因素对体系的影响。在最佳实验条件下,亚氯酸钠在0.006 07~0.546μg/mL范围内与ΔIRS呈良好的线性关系,线性回归方程为ΔIRS=3 477.4ρ+54.532(ρ的单位为μg/mL),相关系数(R~2)为0.994 5,检出限(3σ)为3.9×10~(-3)μg/mL。
In the potassium iodide hydrochloric acid medium,Chlorite can oxidize I~- into I_2,excessive I~- and I_2 form I_3~-,and Phenosafranine can react with I_3~- to form nano-complexes which generate resonance scattering effect at the position 320 nm. On these grounds,a kind of new method-resonance scattering spectrometry has been established.The influences of the factors,such as the dosages of potassium iodide,phenosafranine,etc. on the system have been investigated. Under the optimal conditions,sodium chlorite content in the range of 0.006 07~0.546 μg/mL and ΔIRS show a good linear relationship. The linear regression equation for ΔIRS= 3 477.4ρ+54.532(ρ unit is μg/mL),correlation coefficient is 0.994 5,detection limit is 3.9×10~(-3)μg/mL.
In the potassium iodide hydrochloric acid medium,Chlorite can oxidize I~- into I_2,excessive I~- and I_2 form I_3~-,and Phenosafranine can react with I_3~- to form nano-complexes which generate resonance scattering effect at the position 320 nm. On these grounds,a kind of new method-resonance scattering spectrometry has been established.The influences of the factors,such as the dosages of potassium iodide,phenosafranine,etc. on the system have been investigated. Under the optimal conditions,sodium chlorite content in the range of 0.006 07~0.546 μg/mL and ΔIRS show a good linear relationship. The linear regression equation for ΔIRS= 3 477.4ρ+54.532(ρ unit is μg/mL),correlation coefficient is 0.994 5,detection limit is 3.9×10~(-3)μg/mL.
引文
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[2]吴明松,李绍峰,李百祥,等.亚氯酸盐对三代大鼠的胚胎毒性[J].中国环境科学,2011,31(11):1900-1903.
[3]陆坤明.WHO《饮用水水质准则》第3版(2004)“水安全计划”简介[J].净水技术,2006,25(06):21-26.
[4]吴燕琴,郭梁钻,谢丽章.饮用水中溴酸盐、亚氯酸盐、氯酸盐、溴离子的离子色谱测定法[J].环境科学与管理,2009,34(11):114-116.
[5]凌绍明,欧阳辉祥,陈盛余,等.吖啶橙共振散射光谱法快速测定水中痕量亚氯酸根[J].工业水处理,2016,36(9):89-91.
[6]陈兰化,葛海燕.以酚藏花红为指示剂催化荧光法测定痕量钒的研究[J].光谱学与光谱分析,2003,23(6):1154-1156.