title: Simultaneous determination of carvedilol and ampicillin sodium by first-derivative fluorometry in the presence of human serum albumin.
abstract: A sensitive and selective method for the simultaneous determination of carvedilol and ampicillin sodium (AS) in the presence of human serum albumin (HSA) is described. The maximum emission wavelengths of carvedilol and AS are at 357 nm and 426 nm with excitation at 254 nm, respectively. The first-derivative peaks of carvedilol and AS were at 337 nm and 398 nm, respectively. The linear-regression equations of the calibration graphs of carvedilol and AS were C = 0.0001H - 0.0063 and C = 1.530H - 43.84; the correlation coefficients were 0.9990 and 0.9986, respectively. The detection limits were 1 ng ml(-1) for carvedilol and 23 microg ml(-1) for AS, respectively. The effects of the pH, the stability of carvedilol and AS and foreign ions on the determination of carvedilol and AS were examined. The recoveries of carvedilol and AS were measured. This method is simple and can be used for the determination of carvedilol and AS in human serum and urine samples with satisfactory results.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, People's Republic of China. wanghuaiyou@sdnu.edu.cn
authors.forename: Huai You
authors.initials: HY
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Xiao
authors.forename: Juan
authors.initials: J
authors.lastname: Han
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000032:analysis* / Q000097:blood / Q000652:urine; D000667:Ampicillin / Q000032:analysis* / Q000097:blood / Q000652:urine; D002021:Buffers; D002138:Calibration; D002227:Carbazoles / Q000032:analysis* / Q000097:blood / Q000652:urine; D000077261:Carvedilol; D005470:Fluorometry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D010406:Penicillins / Q000032:analysis* / Q000097:blood / Q000652:urine; D011412:Propanolamines / Q000032:analysis* / Q000097:blood / Q000652:urine; D012015:Reference Standards; D015203:Reproducibility of Results; D012709:Serum Albumin / Q000737:chemistry; D012996:Solutions
chemical_list: D000319:Adrenergic beta-Antagonists; D002021:Buffers; D002227:Carbazoles; D007202:Indicators and Reagents; D010406:Penicillins; D011412:Propanolamines; D012709:Serum Albumin; D012996:Solutions; D000077261:Carvedilol; D000667:Ampicillin