- P-ISSN 1225-0163
- E-ISSN 2288-8985
TOA의 방사선 분해산물중 TOA, DOA 및 MOA 함량을 액체크로마토그래피-질량분석기로 정량 분석하였다. Phenomenex LUNA-C18 분리관에서 CH3OH와 H2O(50mmol CH3COONH4) 혼합용액을 이동상으로 하여 TOA, DOA 및 MOA의 머무름 거동을 살펴보았으며, 이동상의 부피비가 85:15일 때 방사선 분해산물의 분리가 가장 효율적이었다. MOA, DOA 및 TOA의 분리봉우리는 각각 2.7분, 4.3분, 그리고 16.6분에서 나타났으며, 측정 농도범위는 30~160g/mL가 적합하였다. 이 범위에서 검량곡선은 r2 = 0.999의 좋은 상관관계를 보여주었으며, 시료량 20L를 취할 경우에 SCAN mode에서 TOA, DOA의 검출한계는 각각 0.1g/mL, 1g/mL이었고, SIM mode에서 MOA의 검출한계는 0.1g/mL이었다.
Tri-octyl amine (TOA) is used in solvent extraction process for radioactive waste. This compound may be degraded to di-octyl amine (DOA), mono-octyl amine (MOA) by radioactive materials. Amount of TOA, DOA and MOA in TOA must be monitored because they production of these compounds means degradation of which leads to a decrease in the extraction yield. Retention behavior for TOA, DOA and MOA are studied with Phenomenex LUNA-C18 (4.6mm25cm) analytical column and CH3OH:H2O (50mmol CH3COONH4) eluent by liquid chromatography. Optimum condition for these compounds is CH3OH:H2O (50 mmol CH3COONH4)=85:15 ratio. TOA, DOA and MOA compounds is well separated within 20minute. Dynamic range is 30~160g/mL for TOA, 5~100g/mL for DOA and 0.1~5g/mL for MOA, respectively. The detection limit are 0.1g/mL for TOA, 1g/mL for DOA (in SCAN mode) and 0.1g/mL for MOA (in SIM mode) in this system with 20L sample loop.
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