Development of simple detection methods for ultra-trace phosphate in water

Research Project

Project/Area Number	20560504
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Civil and environmental engineering
Research Institution	Toyohashi University of Technology
Principal Investigator	KISO Yoshiaki Toyohashi University of Technology, 大学院・工学研究科, 教授 (20144206)
Project Period (FY)	2008 – 2010
Project Status	Completed (Fiscal Year 2010)
Budget Amount *help	¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000) Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000) Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000) Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords	富栄養化 / リン酸イオン / 超高感度分析 / オンライン固相抽出 / 検出限界 / ダイナミックレンジ / リン / メンブレン抽出 / 妨害物質
Research Abstract	We developed a method for measuring ultra-trace level phosphate by online solid-phase extraction combined with HPLC. The detection limit (0.1μg-PO_4/L) was successfully improved with comparison to a conventional sensitive analytical method. In this method, ion par of phosphoantimonylmolybdenum blue and a quaternary ammonium ion was entrapped with a ODS mini-column, and the ion pair was eluted with CH_3CN/H_2O to quantified it by uv/vis detector. The advantages of this method are a wide detecting range (0.1-200μg-PO_4/L) and no disturbance with salinity.