먹는물 중 Formaldehyde 분석방법 비교 및 적용성 평가
Assessment of Analytical Methods for Formaldehyde in Drinking Water
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In this study, the Korean standard method for unregulated drinking water containments was compared withinternationally accredited standard methods. As a result of comparing various derivatization conditions, it wasfound that the derivatization time could be shortened from 2 hours to 30 minutes and that the reaction temperaturecould be decreased from 35±2oC to the room temperature. Formaldehyde (FA) derivatives (FA-PFBHA,FA-DNPH) were determined by GC/ECD, GC-MS and UV/VIS. The PFBHA-UV/VIS method was suggestedas a substitute of the DNPH-UV/VIS approach. Blank samples were controlled more easily by the applicationof the PFBHA-UV/VIS method than of the DNPH-UV/VIS. In order to compare FA-DNPH and FA-PFBHAderivatization methods using HPLC/UV, bottled water was employed to assess the applicability to real samples. The assessment found that the correlation coefficients of the two methods were above 0.9. The use of spectrophotometerwas considered another approach to determining FA in aqueous solution. Yellow FA compoundswere determined while ammonium salt was contained in the same solution. An automated spectrophotometricanalyzer was also tested. The result showed that this approach was highly applicable.
Abstract
In this study, the Korean standard method for unregulated drinking water containments was compared withinternationally accredited standard methods. As a result of comparing various derivatization conditions, it wasfound that the derivatization time could be shortened from 2 hours to 30 minutes and that the reaction temperaturecould be decreased from 35±2oC to the room temperature. Formaldehyde (FA) derivatives (FA-PFBHA,FA-DNPH) were determined by GC/ECD, GC-MS and UV/VIS. The PFBHA-UV/VIS method was suggestedas a substitute of the DNPH-UV/VIS approach. Blank samples were controlled more easily by the applicationof the PFBHA-UV/VIS method than of the DNPH-UV/VIS. In order to compare FA-DNPH and FA-PFBHAderivatization methods using HPLC/UV, bottled water was employed to assess the applicability to real samples. The assessment found that the correlation coefficients of the two methods were above 0.9. The use of spectrophotometerwas considered another approach to determining FA in aqueous solution. Yellow FA compoundswere determined while ammonium salt was contained in the same solution. An automated spectrophotometricanalyzer was also tested. The result showed that this approach was highly applicable.
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