根据Cd2+对邻菲啰啉和亮黄阴离子所产生的共振光散射具有显著增强作用,实验建立了共振光散射法测定饲料中镉含量的新方法。在pH 8.0氨-氯化铵缓冲溶液中,Cd2+与邻菲啰啉和亮黄阴离子发生离子缔合反应,使共振光散射显著增强。经优化最佳...根据Cd2+对邻菲啰啉和亮黄阴离子所产生的共振光散射具有显著增强作用,实验建立了共振光散射法测定饲料中镉含量的新方法。在pH 8.0氨-氯化铵缓冲溶液中,Cd2+与邻菲啰啉和亮黄阴离子发生离子缔合反应,使共振光散射显著增强。经优化最佳实验条件为:10 mL比色管中加入0.8 mL pH 8.0氨-氯化铵缓冲溶液、2.0 mL 1.0×10-4mol/L邻菲啰啉溶液和1.5 mL 2.0×10-5mol/L亮黄溶液,室温反应8 min后测定。结果表明,最大共振光散射峰位于625 nm,共振光散射增强程度与Cd2+浓度在0～10μg/L线性关系良好,方法检出限为0.086μg/L(n=11)。采用巯基棉分离技术,测定饲料中镉含量,结果与原子吸收法一致,相对标准偏差为2.4%～3.2%(n=5),样品加标回收率为97.3%～98.9%。展开更多
Chloride ion was determined by the resonance light scattering method.The results showed the RLS intensity of the blank solution was faint.While chloride ion was added,the RLS intensity enhanced quickly and was proport...Chloride ion was determined by the resonance light scattering method.The results showed the RLS intensity of the blank solution was faint.While chloride ion was added,the RLS intensity enhanced quickly and was proportional to the concentration of choloride ions.The assay is simple,rapid and sensitive with the linear range up to 14.0 μg/mL and the detection limit at 0.04 μg/mL.The recoveries of the method found to be in the range of 98.7%—102% with RSD between 1.1% and 2.2%.This assay was applied to the determination of chloride ions in acid copper plating bath and in tap water,and the results were satisfactory.展开更多
文摘根据Cd2+对邻菲啰啉和亮黄阴离子所产生的共振光散射具有显著增强作用,实验建立了共振光散射法测定饲料中镉含量的新方法。在pH 8.0氨-氯化铵缓冲溶液中,Cd2+与邻菲啰啉和亮黄阴离子发生离子缔合反应,使共振光散射显著增强。经优化最佳实验条件为:10 mL比色管中加入0.8 mL pH 8.0氨-氯化铵缓冲溶液、2.0 mL 1.0×10-4mol/L邻菲啰啉溶液和1.5 mL 2.0×10-5mol/L亮黄溶液,室温反应8 min后测定。结果表明,最大共振光散射峰位于625 nm,共振光散射增强程度与Cd2+浓度在0～10μg/L线性关系良好,方法检出限为0.086μg/L(n=11)。采用巯基棉分离技术,测定饲料中镉含量,结果与原子吸收法一致,相对标准偏差为2.4%～3.2%(n=5),样品加标回收率为97.3%～98.9%。
文摘Chloride ion was determined by the resonance light scattering method.The results showed the RLS intensity of the blank solution was faint.While chloride ion was added,the RLS intensity enhanced quickly and was proportional to the concentration of choloride ions.The assay is simple,rapid and sensitive with the linear range up to 14.0 μg/mL and the detection limit at 0.04 μg/mL.The recoveries of the method found to be in the range of 98.7%—102% with RSD between 1.1% and 2.2%.This assay was applied to the determination of chloride ions in acid copper plating bath and in tap water,and the results were satisfactory.
