SOLID-PHASE EXTRACTION-PHOTOMETRIC DETERMINATION OF IRON(Ⅲ)IN WATER SAMPLES USING THE REAGENT 5,7-DIBROMO-8-HYDROXYQUINOLINE (DBHQ)
摘 要
研究了5,7-二溴-8-羟基喹啉(DBHQ)与铁的显色反应,在pH 7.0的乙酸铵溶液中,CTMAB存在下,DBHQ与铁反应生成3∶1稳定的蓝紫色配合物,该配合物可被Waters Sep-Park-C18固相萃取小柱萃取,富集的配合物用乙醇洗脱后用光度法测定,配合物λmax=610 nm,在此波长下其它金属离子的配合物无光吸收,对铁选择性很好.铁含量在0-5 mg·L-1内符合比耳定律,方法用于水样中痕量铁的测定,回收率为97%-103%.
Abstract
In an NH4OAc buffer medium of pH 7.0 and in the presence of CTMAB,DBHQ reacts with Fe(Ⅲ) to form a stable coordination complex with mole ratio (R∶Co) of 3 to 1.The colored complex was concentrated on Waters Sep-Park C18 solid-phase extraction column by passing the sample solution through the column at a flow-rate of 10 mL·min-1.The solution remained in the column was removed by centrifuging the extraction column.The Fe(Ⅲ)-DBHQ complex was then eluted from the column with 2.0 mL of ethanol at a flow-rate of 5 mL·min-1.The eluate was transferred to an absorption cell with appropriate light-path,and the absorbance was measured at 610 nm,the λmax of the colored complex,using reagent blank as reference solution.It was found that most of the common co-existing ions in water sample have no absorption at this wavelength,hence do not interfere with the determination of Fe(Ⅲ).Beer′s law holds in the range of 0-5 μg per mL of solution,with a molar absorptvity of 7.24×103L·mol-1·cm-1.In its application to the analysis of water samples,RSD′s of less than 3% were obtained.Recoveries were found in the range of 97%-103%.
中图分类号 O657.31
所属栏目 工作简报
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收稿日期 2004/9/16
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备注董学畅(1945-),男,云南大理人,白族,特聘教授,硕士研究生,研究方向为功能有机试剂合成和应用研究.
引用该论文: DONG Xue-chang,QIAO Yong-feng,HU Qiu-fen,SUN Hai-lin. SOLID-PHASE EXTRACTION-PHOTOMETRIC DETERMINATION OF IRON(Ⅲ)IN WATER SAMPLES USING THE REAGENT 5,7-DIBROMO-8-HYDROXYQUINOLINE (DBHQ)[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(4): 269~271
董学畅,乔永锋,胡秋芬,孙海林. 5,7-二溴-8-羟基喹啉固相萃取光度法测定水样中铁[J]. 理化检验-化学分册, 2006, 42(4): 269~271
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参考文献
【1】国家环保局《水和废水监测分析方法》编委会编.水和废水监测分析方法.第三版[M].北京:中国环境科学出版社,1998.163-165.
【2】王家风,周正敏,吴英绵.铁-邻二氮菲-曙红离子缔合物显色反应的研究及应用[J].理化检验-化学分册),2001,36(1):18.
【3】邬春化,古 昆,杨光宇,等.4-(H-酸偶氮-1-苯基-3-甲基-吡唑啉酮与铁(Ⅲ)的显色反应的研究[J].冶金分析,1999,19(4):14.
【4】李忠,王保兴,杨光宇,等.芸香苷分光光度法测定烟草中铁[J].理化检验-化学分册,2002,38(5):247.
【5】殷国健,马莎,杨光宇,等.新型显色剂2-(H-酸偶氮)-4,5-二硝基苯酚测定铁(Ⅲ)[J].光谱实验室,2000,17(4):456.
【6】曾云鹗,张华山,陈震华编.现代化学试剂手册(四分册).无机离子显色剂[M].北京:化学工业出版社,1989.640.
【7】张淑琼,熊俊如.8-羟基喹啉衍生物的合成[J].四川师范大学学报(自然科学版),2001,24(3):280.
【8】刘德敏,刘翔峰.5,7-二溴-8-羟基喹啉与含N协配体双镅和铕的萃取研究[J].核化学与放射化学,1997,19(3):12.
【2】王家风,周正敏,吴英绵.铁-邻二氮菲-曙红离子缔合物显色反应的研究及应用[J].理化检验-化学分册),2001,36(1):18.
【3】邬春化,古 昆,杨光宇,等.4-(H-酸偶氮-1-苯基-3-甲基-吡唑啉酮与铁(Ⅲ)的显色反应的研究[J].冶金分析,1999,19(4):14.
【4】李忠,王保兴,杨光宇,等.芸香苷分光光度法测定烟草中铁[J].理化检验-化学分册,2002,38(5):247.
【5】殷国健,马莎,杨光宇,等.新型显色剂2-(H-酸偶氮)-4,5-二硝基苯酚测定铁(Ⅲ)[J].光谱实验室,2000,17(4):456.
【6】曾云鹗,张华山,陈震华编.现代化学试剂手册(四分册).无机离子显色剂[M].北京:化学工业出版社,1989.640.
【7】张淑琼,熊俊如.8-羟基喹啉衍生物的合成[J].四川师范大学学报(自然科学版),2001,24(3):280.
【8】刘德敏,刘翔峰.5,7-二溴-8-羟基喹啉与含N协配体双镅和铕的萃取研究[J].核化学与放射化学,1997,19(3):12.
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