XÁC NHẬN GIÁ TRỊ SỬ DỤNG CỦA PHƯƠNG PHÁP PHÂN TÍCH CÁC HỢP CHẤT BENZYL ALCOHOL TRONG MẪU NƯỚC KHAI THÁC DẦU BẰNG SẮC KÝ KHÍ KHỐI PHỔ

Abstract

In this study, a procedure to simultaneously analyze three benzyl alcohol compounds including 2- fluorobenzyl alcohol (2-FBOH), 2,6-dichorobenzyl alcohol (2,6-DClBOH) and 3,4-difluorobenzyl alcohol (3,4-DFBOH) in produced water samples was developed for the application in a partitioning inter-well tracer test to determine residual oil saturation (Sor) in oilfield production. The sample was passed through a solid phase extraction column, then the column was dried under vacuum and flushed with 5 mL of acetonitrile. The obtained acetonotrile extract was measured on a gas chromatography-mass spectrometrer (GC-MS). The analytical method met AOAC requirements for detectability, recovery and repeatability. Depending on each benzyl alcohol compound, the limit of detection (LOD) of the method was in the range of 7  10 µg/L, the limit of quantification ( LOQ) ranges from 24 to 32 µg /L, recovery was achieved from 90 to 110% and the relative deviation values of (RSD) was below 9%.