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냉각증기 원자흡수분광법에 의한 뇨 및 공기중의 무기수은 정량에 관한 연구
오세민,오도석 한국산업위생학회 1991 한국산업보건학회지 Vol.1 No.2
Inorganic mercury in urine and airborne was determined by cold vapor atomic absorption spectrophotometry. Detailed sampling methods and analytical results are as follows : 1. 100∼200㎖ of urine for each person was taken in 250㎖ borosilicate bottle and K₂S₂O_8 (0.1g/100㎖ urine) was added to prevent bacterial contamination. About 1001 air of workingplace was absorbed in l0㎖ of absorbing solution. Urine samples and absorbing solution tubes were stored at 4℃. Dillution solution to prepare standard solution used deionized water (D.W) for urine and absorbing solution (A.S) for air. 2. In this procedure detection limit was l ng/㎖ and mercury contents of blank reagent solution was 1∼2 ng/㎖. 3. Calibration range was 0.02∼0.1 ㎍/㎖ and in this range r.s.d for each calibration curve in D.W and A.S and ±7.9% and ±3.7%, respectively. 4. Repeatability (n=5 times, conc. 0.05 ㎍/㎖) was ±5.8%, in D.W. and ±4.4% in A.S, respectively. 5. Recovery for urine adding spiked concentration (0.05 ㎍/㎖) was about 90%. 6. Analytical result of samples was 1∼139 ㎕/1 in urine and ∼0.127 ㎎/㎥ in airborne.
오세민,이건형 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
A ratiometric fluorescent probe was synthesized based on the peptide receptor bearing a pyrene fluorophore for As(III). The peptidyl probe showed ratiometric responses to several heavy metal ions including As(III) in aqueous solution, whereas the probe showed a selective ratiometric to As(III) among tested metal ions in the presence of metal chelating agent, pyridine-2,6-dicarboxylic acid (PDCA). The probe showed a sensitive ratiometric response to As(III) in the presence of PDCA. The detection limit for As(III) in ground water was measured to be 2.08 ppb in the presence of PDCA, which is lower than the maximum allowable level of As(III) (10 ppb) in drinking water by EPA. The binding mode study of the peptidyl probe for As(III) was carried out using IR measurements, DLS measurements and pH titration.