{"title":"高效液相色谱法测定2-(8-喹啉偶氮)-4,5-二苯咪唑和过氧化氢三元配合物中钒的含量","authors":"Chengjie Zhang, Jing Liu, B. Yao, Luo-hong Zhang","doi":"10.1109/ISWREP.2011.5893600","DOIUrl":null,"url":null,"abstract":"A method based on reversed-phase high performance liquid chromatographic separation in combination with spectrophotometric detection was developed for the determination of trace amounts of vanadium(V) as its ternary complex with 2-(8-quinolylazo)-4,5-diphenylimidazole (QAI) and hydrogen peroxide. Spectral and chromatographic behaviors of the ternary complex were investigated. The complex was formed in weekly acidic medium (pH 2.5-4.0) and separated on a Cosmosil 5C8-MS column with 58% (m/m) aqueous acetonitrile mobile phase containing 5.0 × 10-3 mol kg-1 acetate buffer (pH 3.5), 1.0 × 10-4 mol kg-1 tetrabutylammonium bromide and 1.0 × 10-3 mol kg-1 ethylenediaminetetraacetic acid and detected at 595 nm. The calibration curve was linear up to 35 ng for vanadium(V) in 25.0 mL of test solution at 0.001 absorbance unit full scale. The detection limit was 2 pg for vanadium(V) with 100 L injection. The method showed good accuracy, selectivity and sensitivity for the determination of vanadium(V) in environmental samples.","PeriodicalId":6425,"journal":{"name":"2011 International Symposium on Water Resource and Environmental Protection","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2011-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Determination of vanadium(V) based on its ternary complex with 2-(8-quinolylazo)-4,5-diphenylimidazole and hydrogen peroxide by high performance liquid chromatography\",\"authors\":\"Chengjie Zhang, Jing Liu, B. Yao, Luo-hong Zhang\",\"doi\":\"10.1109/ISWREP.2011.5893600\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A method based on reversed-phase high performance liquid chromatographic separation in combination with spectrophotometric detection was developed for the determination of trace amounts of vanadium(V) as its ternary complex with 2-(8-quinolylazo)-4,5-diphenylimidazole (QAI) and hydrogen peroxide. Spectral and chromatographic behaviors of the ternary complex were investigated. The complex was formed in weekly acidic medium (pH 2.5-4.0) and separated on a Cosmosil 5C8-MS column with 58% (m/m) aqueous acetonitrile mobile phase containing 5.0 × 10-3 mol kg-1 acetate buffer (pH 3.5), 1.0 × 10-4 mol kg-1 tetrabutylammonium bromide and 1.0 × 10-3 mol kg-1 ethylenediaminetetraacetic acid and detected at 595 nm. The calibration curve was linear up to 35 ng for vanadium(V) in 25.0 mL of test solution at 0.001 absorbance unit full scale. The detection limit was 2 pg for vanadium(V) with 100 L injection. The method showed good accuracy, selectivity and sensitivity for the determination of vanadium(V) in environmental samples.\",\"PeriodicalId\":6425,\"journal\":{\"name\":\"2011 International Symposium on Water Resource and Environmental Protection\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2011-06-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2011 International Symposium on Water Resource and Environmental Protection\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISWREP.2011.5893600\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 International Symposium on Water Resource and Environmental Protection","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISWREP.2011.5893600","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Determination of vanadium(V) based on its ternary complex with 2-(8-quinolylazo)-4,5-diphenylimidazole and hydrogen peroxide by high performance liquid chromatography
A method based on reversed-phase high performance liquid chromatographic separation in combination with spectrophotometric detection was developed for the determination of trace amounts of vanadium(V) as its ternary complex with 2-(8-quinolylazo)-4,5-diphenylimidazole (QAI) and hydrogen peroxide. Spectral and chromatographic behaviors of the ternary complex were investigated. The complex was formed in weekly acidic medium (pH 2.5-4.0) and separated on a Cosmosil 5C8-MS column with 58% (m/m) aqueous acetonitrile mobile phase containing 5.0 × 10-3 mol kg-1 acetate buffer (pH 3.5), 1.0 × 10-4 mol kg-1 tetrabutylammonium bromide and 1.0 × 10-3 mol kg-1 ethylenediaminetetraacetic acid and detected at 595 nm. The calibration curve was linear up to 35 ng for vanadium(V) in 25.0 mL of test solution at 0.001 absorbance unit full scale. The detection limit was 2 pg for vanadium(V) with 100 L injection. The method showed good accuracy, selectivity and sensitivity for the determination of vanadium(V) in environmental samples.