[Determination of inorganic anions in Herba Ephedrae by ion chromatography].
An ion chromatographic method for the detemination of inorganic anions in Herba Ephedrae was developed. The separation of the anions was achieved on a Shim-Pack IC-AI column with a mixture of 2.5 mmol/L phthalic acid and 2.4 mmol/L tris (hydroxymethyl) amino-methane as mobile phase, and the detection was performed by a conductivity detector. Fluoride, chloride, nitrite, bromide, nitrate and sulfate could be identified within 10 min. The method is simple and useful, and has good linearity with correlation coefficients between 0.999 2 and 0.999 7 and relative standard deviations lower than 1.92%. The recoveries of anions in the samples were between 96.6% and 100.4%.
Fu
Jihong
J
Physics and Chemistry Detecting Center, Xinjiang University, Urumqi 830046, China. fjh.518@163.com
Xie
Chengxi
C
Zhang
Lijing
L
D000838:Anions / Q000032:analysis*; D002852:Chromatography, Ion Exchange / Q000379:methods; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D029789:Ephedra / Q000737:chemistry*; D007287:Inorganic Chemicals / Q000032:analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D000838:Anions; D004365:Drugs, Chinese Herbal; D007287:Inorganic Chemicals