총 인 분석을 위한 자동 전처리 시스템

Automated On-Line Digestion System for the Determination of Total Phosphorus

  • 정형근 (연세대학교 환경공학과) ;
  • 조영일 (연세대학교 환경공학과) ;
  • 김범식 (연세대학교 환경공학과) ;
  • 박주형 (연세대학교 환경공학과)
  • 발행 : 2001.02.01

초록

An on-line digestion system based on the flow injection analysis technique was presented for the determination of total phosphorus. The system converts condensed and organic phosphoruses into orthophosphate that can be analyzed spectrophotometically. The reaction between orthophosphate and ammonium molybdate in a strong acid medium forms the yellow complex of phosphomolybdate which is next reduced to a molybdic blue complex by stannous chloride. The quantitation of orthophosphate is based on the absorbance of the molybdic blue. To determine total phosphorus, the digestion system was installed between the sample injector and the reaction coil with the added lines of digestion solution(potassium persulfate+sulfuric acid) and the $H_2O$ carrier. The system has shown that the digestion efficiencies were greater than 95% for the typical condensed and organic phosphoruses. When tripolyphosphate standards were used, the calibration data showed that the linear dynamic range extended to a concentration of 1.5ppm with the detection limit of 25ppb total phosphorus. The typical relative standard deviation was less than 2%. The proposed system was successfully applied to lake water, wastewater, and streamwater. The analytical variables such as digestion efficiency, analysis time, and reproducibility were evaluated and compared with the manual digestion method.

키워드

On-line digestion system;Flow injection analysis;Total phosphorus;Orthophosphate;Detection limit

참고문헌

  1. Analytical Chemistry v.28 Micro-determination of Phosphorus Chen,Jr,P.S.;T.Y.Toribara;H.Warner
  2. Anal. Chim. Acta. v.92 FIA Part Ⅸ - A New Approach to Continuous Flow Titration Ruzicka,J.;E.H.Hansen
  3. Anal. Chim. Acta. v.155 Experimental optimization procedures in the determination of phosphate by flow injection analysis Janse,T.A.;H.M.Janse;P.F.A.Van der Wiel;G.Kateman
  4. Anal. Chim. Acta. v.214 Applications of in Situ Detection with an Automated Microbatch Analyzer Jamal,A.S.;P.K.Dasgupta
  5. Analytical Chemistry v.54 Determination of Phosphate in Seawater by Flow Injection Analysis with injection of Reagent Kenneth,S.J.;R.L.Petty
  6. 수질관리 김정현
  7. Anal. Chim. Acta. v.79 Flow injection analysis : Part Ⅱ Ruzicka,J.;J.W.B.Stewart
  8. Talanta v.38 no.2 Automated determination of total phosphorus in aqueous samples Dong,S.;P.K.Dasgupta
  9. 93 추계환경종합학술대회요지집 호수의 인 농도 측정을 위한 Ascorbic Acid 방법의 측정 한계에 관한 실험적 연구 서동일;김선미
  10. Analyst v.120 no.1 Determination of micro amount of phosphorus with Malachite green using a filtration- dissolution preconcentration method and flow injection-spectrophotometric detection Joko,P.S.;M.Oshima;S.Motomizu;H.Mikasa;Y.Hori
  11. Analytical Chemistry v.56 Determination of orthophosphate by Flow Injection Analysis with Amperometric Detection Sara,M.H.;W.K.Nonidez
  12. Analytical Sciences v.11 On-line pretreatment with Cobat(Ⅲ) ions for a flow injection-sepctrophotometric determination of organic phosphorus Tanata,H.;T.Fukauoka;K.Okamoto
  13. Analytical Chemistry v.43 Spectrofluorimetric determination of orthophosphate as rhodamine B Molybdophosphate Kirkbright,G.F.;R.Narayanaswamy;T.S.West
  14. 환경화학 정문식;정문호;김영규;이진현
  15. Journal of Chemical Education v.56 no.10 lap exercises
  16. 환경과학회지 v.4 no.1 인도페놀법을 이용한 수용액중 암모니아 정량에 관한 연구 : 평형법, 반응속도법, 흐름 주입 분석법의 비교와 평가 정형근;김범식
  17. 환경 화학 유명진;김덕찬
  18. 화학 세계 v.34 환경 시료 분석의 자동화를 위한 흐름 주입 분석법의 응용 정형근;이대운
  19. Anal. Chim. Acta. v.234 Flow-injection technique for the determination of low levels of phosphorus in natural waters Paul,R.F.;I.D.McKelvie;B.T.Hart
  20. Anal. Chim. Acta v.180 Flow injection Analysis(FIA)-Personal View Appelqvist,R.(et al.)