ABSTRACT
Objective To observe the pollution states of environmental estrogen-alkyl pheols in tap water of Shenyang. Methods With solid phase extraction and gas chromatography/mass spectroscope (GC/MS) ionic selective methods, the concentration of pollutants of alkyl pheols were measured in 21 tap water samples of water works of Shenyang. Results The main pollutants of alkyl pheols in tap water of water works in Shenyang were 4-t-octyl phenol, nonyl phenol and bisphenol A. The respective maximum concentration was 690.5 ng/L (ranged 29.5-690.5 ng/L), 2 791.6 ng/L (ranged 212.1-2 791.6 ng/L) and 161.0 ng/L (ranged 14.7-161.0 ng/L). The varieties and concentrations of pollutants of alkyl pheols showed a significant difference among water samples from different water works and the seasonal changing of them was demonstrated in the waters made in the same water works. Conclusion The problem on the drinking water contamination with alkyl pheols in Shenyang should be paid more attention by government.
ABSTRACT
This article introduces a new method: the chemical-activated luciferase gene expression (CALUX)assay for determine of dioxin,which is based on biological properly of a genetically modified cell line.The published thesis reports that the contents of dioxins in a same sample abtained from the CALUX assay and the internationally recoganized standard method for determination of dioxin: high resolution gas chromatography-mass spectrometry(HRGC-MS)showed perfectly positive correlation and well repeatibility. The CALUX assay presents less amount-required sample,shorter determination cycle and less expense compared with HRGC-MS assay. The CALUX assay can be used as a rapid screen assay for determination of dioxin in a large number of samples,and will be widely applied in the survey of dioxin pollution in environment.
ABSTRACT
Objective To study the practicability of the Chemically-Activated Luciferase eXpresson(CALUX)bioassay used as a method for determination of dioxin in environmental epidemiological surveys.Methods The toxicity equivalents of dioxin in the same samples of body fat,blood and mothers milk were determined by high resolution gas chromatography/mass spectrometry(HRGC/MS )and the CALUX bioassay respectively and the relativity of the results obtained by the two different methods was analyzed.Results The correlation coefficients of the results of dioxin toxicity equivalents in body fat and mothers milk determined by the two methods were0.8675and0.9581respectively,which had significant positive correlation(P