Determination of PAHs from PM_(2.5) Using HPLC
A HPLC method,connected by diode array detector and fluorescence detector,was established to separate and detect the mixture of standard samples,with double excitation wavelength to effectively improve the chromatographic separation conditions under the standard sample that had not been separated completely.The best launch wave length of fluorescence examination was 390nm.Based on the set chromatographic conditions,the limits of detection of 16PAHs varied from 0.11μg/L to 39.83μg/L,average recovery range between 76.7%～98.3%,and relative standard deviation between 3.6%～ 14.4%.Five atmospheric sampling points were built in Nanchang,Jiangxi Province and PM2.5 samples were collected.Results indicated that total quantity of PAHs of 29.497ng/m3,maximal concentrations of B(а)P 3.122ng/m3 and equivalent carcinogenic concentration of B(а)P 5.254ng/m3 in Bayi Square were the highest.