title: Ion chromatographic determination of calcium and magnesium cations in human saliva and urine with a piezoelectric detector.
abstract: In this present paper, simultaneous determination of Ca(2+) and Mg(2+) cations in saliva, urine was achieved using an ion chromatography method, in which a piezoelectric quartz crystal (PQC) sensor was used as a detector, and a solution containing tartaric acid (4 mmol 1(-1)) and ethylenediamine (2 mmol 1(-1)) as a mobile phase. Good linearities were obtained over the ranges of 0.8-500 mg 1(-1) Ca(2+) and 1.0-500 mg 1(-1) Mg(2+). The detection limits were 0.4 mg 1(-1) for Ca and 0.2 mg 1(-1) for Mg, respectively.
authors.affiliation: Department of Chemistry, Zhanjiang Normal College, Zhanjiang 524048, Guangdong, People's Republic of China. yubingsheng@21cn.com
authors.forename: B S
authors.initials: BS
authors.lastname: Yu
authors.forename: Q G
authors.initials: QG
authors.lastname: Yuan
authors.forename: L H
authors.initials: LH
authors.lastname: Nie
authors.forename: S Z
authors.initials: SZ
authors.lastname: Yao
mesh_terms: D002118:Calcium / Q000032:analysis* / Q000652:urine; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004563:Electrochemistry / Q000295:instrumentation*; D006801:Humans; D008274:Magnesium / Q000032:analysis* / Q000652:urine; D012463:Saliva / Q000737:chemistry*; D012680:Sensitivity and Specificity
chemical_list: D008274:Magnesium; D002118:Calcium