납-티오황산 착물생성과 구리치환에 의한 미량 납(II)의 비색분석에 관한 연구

• 영문명: Spectrophotometric Determination of Trace Lead(II) After Extraction of Lead-Thiosulfate Complex into Aliquat336-CHCl$_3$ and Replacement by Cu
• 발행기관: 한국환경보건학회
• 저자명: Lee, Seok-Ki Joung, Chang-Ung
• 간행물 정보: 『1. 한국환경보건학회지』제24권 제3호, 1~5쪽, 전체 5쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 1998.09.30

영문 초록

A spectrophotometric method was developed for the acidic solution stripped after an extraction of 0.5 to 2.5 ppm of Lead(II) from 50 mL of $Na_2S_2O_3$ solution into chloroform as the ion-pairs formed between their thiosulfate complexes and alkylamine, Aliquat336. Pb(II) in the stripped solution forms an complex with DDTC in pH 7.3 buffer solution, and was developed in yellow by copper replacement. The ydlow-colored solution have the maximum absorbance at 435 nm in the measurement of absorbance by UV-Visible spectrophotometer. The interference ions such as Fe(III), Hg (II), Al(III), Co, Cu, Ni, Zn, Ca, Sn, have great effects on the extraction, but they were overcomed by the usage of adequate masking agents before an extraction. At last, a good result was obtained in applying this method to synthetic water.

키워드

Extraction Alkylamine Aliquat336 Stripping