Applications of High Resolution Mass Spectrometer for the Multi-residual Measurement 1. Organophosphorous Pesticides Group - II |
고분해능 질량분석장치를 이용한 동시분석법1. 수계의 유기인계 농약 - II |
최재원, 문부식 |
한국수자원공사 |
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Abstract |
Minimizing the detection limits of environmental analytical chemistry field is one of the hot issues for risk
assessment, data mapping and policy making etc. At present study, measurement conditions using high resolution
mass spectrometer with gas chromatograph (GC-HRMS) were optimized for the analysis of organophosphorous
pesticides (OP) group-II from ambient water samples. Exact masses for each compound were
calculated using exact mass of elements listed in National Institute of Standards and Technology (NIST). Exact
masses using selected ion monitoring (SIM) were verified for the target pesticides and internal standards on
DB-5MS capillary column. As an internal standard, isotopes of polycyclic aromatic hydrocarbon (PAHs) were
used. High sensitivities and available separations for the pesticides were obtained by grouping test. Calibration
curves was performed using 0.5~200 ng/mL with R² value ranges for 0.9945~0.9994. Instrumental recoveries
for the known concentrations showed 73~99% with acceptable repeatabilities with some exceptions. Commercially
available solid phase extraction cartridges were compared to optimize the sample preparations.
ENVI-18 showed the highest recovery ranges with 88~124% for the target compounds. |
Key Words:
multi-residual measurement, high resolution mass spectrometer, water, organophosphorous pesticide,
solid phase extraction |
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