LONG Xingyu1,2, SHI Zhihui1, YAN Xuemei1, WU Di3, TIAN Ruqing1, LI Qiuhua3
（1. School of Chemistry and Materials Science, Guizhou Normal University, Guiyang, 550025, China;
2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry Chinese Academy of Sciences, Guiyang, 550081, China;
3. Guizhou Key Laboratory for Mountainous Environmental Information and Ecological Protection, Guizhou Normal University, Guiyang, 550001, China.）
Abstract: Under the acidic condition, lincomycin hydrochloride (LCHC) can sensitize the chemiluminescence produced by the reaction of ruthenium bipyridine and cerium sulfate, the higher is the LCHC concentration the stronger is the chemiluminescence intensity. A new method for rapid determination of LCHC by the ruthenium bipyridine-cerium sulfate chemiluminescence system was established in this study. Under the optimum condition, a very good linear relationship (R2=0.999) between the chemiluminescence intensity and the LCHC concentration in the range of 1.0×10-6 ~1.0×10-3 g/mL was found. The method detection limit was 3.0×10-7 g/mL and a relative standard deviation (RSD) of 5.0% had be achieved in 11 sequential measurements on LCHC samples with a concentration of 5.0×10-5 g/mL. The LCHC standard solutions and rainwater samples were taken in collective investigations, with the standard addition method, the RSDs and the recoveries of rainwater measurements ranged from 1.7% to 5.2% and from 86.7% to 106.7%, respectively. These results indicated that the proposed method is sensitive, accurate, reliable and easy to operate.
Key words: flow injection; chemiluminescence; Ru(bipy)32+-Ce(IV) system; lincomycin hydrochloride (LCHC)
EARTH AND ENVIRONMENT Vol.48, No.4, Tot No.336, 2020, Page 510-517