论文部分内容阅读
F~-、Cl~-、NO_2~(2-)、NO_3~-、SO_4~(2-)是水中常见的五种阴离子,按以往分析方法,最麻烦的是这些离子分析方法各不相同,无法同时测定。本文参考有关资料,应用离子色谱法,一次性分析5种阴离子,仅需9分钟。其回收率为F~-94.0％、Cl~-104.4％,NO_2~- -N95.0%,NO_3~- -N.90.5%,SO_4~(2-)91.25,检出限为F~-3μg/L,Cl~- 3μg/L,NO_2~-N 4μg/L,NO_2~-N 5μg/L,SO_4~(2-)10 μg/L,点间相对标准偏差在7％以内,具有快速、准确、简便、自动化程度高等优点。1 仪器与试剂1.1 DX—500 IC SYSTEM;1.2 去离子水:电导率≤0.03μs/cm;1.3 标准物质:NaF,NaCl,NaNO_2,KNO_3,Na_2SO_4,均为分析纯试
F ~ -, Cl ~ -, NO_2 ~ (2 -), NO_3 ~ - and SO_4 ~ (2-) are five common anions in water. According to the previous analysis methods, the most troublesome are the different analytical methods for these ions, Can not be measured at the same time. This article refers to the relevant information, the application of ion chromatography, a one-time analysis of five anions, only 9 minutes. The recoveries ranged from F ~ -94.0%, Cl ~ -104.4%, NO_2 ~ -N95.0%, NO_3 ~ -N.90.5% and SO_4 ~ (2-) 91.25, L, Cl ~ - 3μg / L, NO_2 ~ N 4μg / L, NO_2 ~ N 5μg / L and SO_4 ~ (2-) 10 μg / L with relative standard deviations within 7% Accurate, simple, high degree of automation advantages. 1 instruments and reagents 1.1 DX-500 IC SYSTEM; 1.2 deionized water: conductivity ≤ 0.03μs / cm; 1.3 standard substances: NaF, NaCl, NaNO_2, KNO_3, Na_2SO_4,