Determination of Phenols in Soak Water from Drinking Water Related Products by Gas Chromatography-Mass Spectrometry with Large Volume Injection
A method was developed for the determination of phenols in soak water from drinking water related products by gas chromatography-mass spectrometry (GC-MS) with on-column large volume injection (OCI-LVI) and coupled column separation. The sample was firstly soaked according to related standard method. And then, 0.2 g/L of Na(2)S(2)O(3) was used as reductant to remove excessive chlorine. After spiked 2,4-dibromo-phenol as internal standard, 10 mL of the soak water was adjusted to pH 6. 8, saturated by NaCl and extracted by 1 mL of organic solvent. Approximately 30 mu L. of up-layer extract was used as injecting sample. The advantage of the short coupled polar column in increasing retention capacity of volatile phenols in OCI-GC-MS system was discussed. The LODs were 0.1-1 mu g/L. The recoveries were 76. 7%-112% with 5. 94%-12. 4% of RSD.