电热蒸发进样-等离子体光谱法间接测定氟

电热蒸发进样-等离子体光谱法间接测定氟 INDIRECT DETERMINATION OF FLUORINE IN WATER SAMPLES BY ICP-AES WITH FLUORINATION ASSISTED ELECTROTHERMAL VAPORIZATION FOR SAMPLE INTRODUCTION 胡斌 Hu Bin 1 2 3 first-author 吉红念 Ji Hongnian 1 2 3 江祖成 Jiang Zucheng 1 2 3 曾云鹗 Zeng Yun’e 1 2 3 武汉大学化学系 武汉大学化学系 Department of Chemistry, Wuhan University Department of Chemistry, Wuhan University 武汉大学化学系,武汉 武汉大学化学系,武汉 ,430072 ,430072 提出了电热蒸发进样（ETV）等离子体光谱法（ICP-AES）间接测定水样中氟的新方法,该法基于在一定条件下,镧、茜素氨羧络合剂（AC）和氟形成的三元络合物被N,N-二乙基苯胺/异戊醇溶液萃取,再经HCl反萃取,以聚四氟乙烯为氟化剂,氟化电热蒸发-ICP-AES测定镧,从而间接测定氟,对ETV-ICP-AES操作参数和萃取条件进行了优化,考察了共存离子对萃取和测定的影响,提出用磺基水杨酸作掩蔽剂掩蔽Fe 3+ ,Al 3+ ,Cu 2+ 的干扰,测定氟的线性范围为0.01～1.0mg/L,检出限为2×10 -4 mg/L,RSD为3.0%（n=9,浓度为0.1mg/L）,该法具有灵敏、进样量小的优点,用于自来水中氟的测定时,其分析结果和电化学方法分析结果吻合很好。 A sensitive indirect determination of fluorine in water samples by ICP-AES combined with fluorinating electrothermal vaporization for sample introduction has been described in this paper. At pH 4.5, the ternary complex was formed and extracted with isoamyl alcohol containing N, N-diethylaniline, back-extracted with 0.5mol/L HCl. The aqueous phase was mixed with PTFE emulsion, and the fluorine was indirectly determined by measurement of La Ⅱ 333. 75nm emission line. The interferences of coexisting ions were studied, and sulfosalicylic acid was used as a masking agent for masking interferences of Al 3+ ,Fe 3+ ,and Cu 2+ , The calibration curve was linear from 0.01 to 1.0 mg/L of fluoride, and the detection limit was 2×10 -4 mg/L,RSD was 3.0% （n=11） at the concentration of 0.1mg F/L. The proposed method has been applied to the determination of fluorine in tap waters and the results obtained are coincided with electroanalytical results. 电热蒸发进样 等离子体光谱 间接测定 氟 O657.31 1993-03-01 2021-04-01 3