Indirect spectrophotometric determination of arsenic(III) based on solid-phase extraction

固相萃取间接分光光度法测定砷(III)

• 批准号: 13640596
• 负责人: OHZEKI Kunio
• 金额: $ 2.43万
• 依托单位: Hirosaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640596/
• 关键词: arsenic(III); arsenic(III,V); arsenic(III)-APDC complex; copper(II)-APDC complex; finely divided ion-exchange resin; resin-phase extraction; resin-phase spectrophotometry; ヒ素; 間接固相吸光光度法; イオン交換樹脂薄層; 固相抽出; ヒ素-APDC錯体; 固相吸光光度定量

A new method for the indirect spectrophotometic determination of arsenic was developed. This method is based on the extraction of arsenic(III) from a solution of pH 1.5 on a finely divided anion-exchange resin as a complex with ammonium pyrrolidinedithiocarbamate(APDC), separation of the resin fixing the As(III)-APDC complex from the bulk solution on a membrane filter, re-dispersion of the resin in a solution containing copper(II) and conversion a coloreless As(III)-APDC complex to a yellow Cu(II)-APDC complex, collection of the rsin on a membrane filter and measurement of the absorbance of the resulting Cu(II)-APDC complex in the resin phase by a spectrophotometer or a densitometer. The effects of interfering ions were successfully suppressed with the combined use of diethyldithiocarbamate(DDTC) and EDTA. The method was applied to a standard river water sample. Good results were obtained for the detemination of arsenic(III,V) at the ppb level in 40ml of the sample.

建立了间接分光光度法测砷的新方法。该方法的基础是：在pH值为1.5的溶液中，以精细分离的阴离子交换树脂作为吡咯烷二硫代氨基甲酸铵(APDC)的络合物从溶液中提取砷(III)，在膜过滤器上从主体溶液中分离固定As(III)-APDC络合物的树脂，将树脂在含铜(II)的溶液中重新分散，并将无色的As(III)-APDC络合物转化为黄色的Cu(II)-APDC络合物，在膜过滤器上收集rsin，并用分光光度计或密度计测量生成的铜(II)-APDC络合物在树脂相中的吸光度。将二乙基二硫代氨基甲酸酯(DDTC)与EDTA联用，成功地抑制了干扰离子的影响。将该方法用于标准河水样品的测定。用于40ml样品中ppb级砷(III、V)的测定，结果良好。

项目成果

Yuuji SANO, Tomomi KATO, Isoshi NUKATSUKA, Kunio OHZEKI: "Spectrpphotometric Determination of arsenic(III) based on solid-phase extraction of the arsenic-APDC complex and the conversion to the copper complex"BUNSEKI KAGAKU. Vol.52, No.12. 1153-1158 (2003)

Yuuji SANO、Tomomi KATO、Isoshi NUKATSUKA、Kunio OHZEKI：“基于砷-APDC 络合物的固相萃取和铜络合物转化的分光光度法测定砷 (III)”BUNSEKI KAGAKU。

佐野祐司, 加藤朋美, 糠塚いそし, 大関邦夫: "ヒ素-APDC錯体の固相抽出と銅-APDC錯体への変換に基づくヒ素(III)の吸光光度定量"分析化学. 52巻・12号. 1153-1158 (2003)

Yuji Sano、Tomomi Kato、Isoshi Nukazuka、Kunio Ozeki：“基于砷-APDC 络合物的固相萃取和铜-APDC 络合物的分光光度测定”，《分析化学》第 52 卷，第 12 期。 1153-1158 (2003)