GC-EI-MS internal standard analysis of phthalic acid esters in fish
- 化学化工－已发表论文 
The fish samples were cleaned up by Florisil, then analyzed by GC-EI-MS to determine eight phthalic acid esters, diethyl phthalate (DEP), dipropyl phthalate (DPrP), dibutyl phthalate (DBP), butyl benzyl phthalate (BBP), dipentyl phthalate (DPeP), dicyclohexyl phthalate (DCHP), dihexyl phthalate (DHP) and diethyl hexyl phthalate (DEHP). The external standard and internal standard method were compared, and the pretreatment method was optimized. Especially, the problem of analytical blank control in this experiment was discussed carefully. The linear range of the method was 50.0 similar to 800 mu g.L-1, and the linear cor relation coefficient (R) was higher than 0.99986. The relative standard deviation of the method was less than 12.7% with the recovery values ranging from 74% to 113%. The limit of detection was lower than 3.66 mu g.L-1. The linear range, accuracy, precision and limit of detection of this method can satisfy the request of simultaneous analysis of PAEs in fish by GC-EI-MS.