RESUMO
OBJECTIVE:To establish a method for simultaneous determination of the content of 14 common metal elements (Mg,Ca,Cr,Mn,Fe,Ni,Cu,Zn,As,Se,Cd,Sb,Ba and Pb)in Ganmao qingre granules. METHODS:Microwave diges-tion-inductively coupled plasma mass spectrometry(ICP-MS)method was conducted. The samples were digested with concentrated nitric acid-hydrogen peroxide(2∶1,V/V),and then ICP-MS was used to determine the mass concentration of 14 metal elements. Li, Sc,Ge,Y,In,Bi and Tb were used as internal standards,and branches and leaves of bush were used as standard substances. RE-SULTS:The correlation coefficient of the standard curves of 14 elements was larger than 0.999 6,detection limits were in the range of 0.002-0.035 μg/L,recoveries were in the range of 80.57%-104.2% and RSDs were in the range of 0.34%-2.71%. CON-CLUSIONS:The method is specific,accurate and sensitive,and suitable for the content determination of 14 common metal ele-ments in Ganmao qingre granules. The total mass concentrations of 6 batches of heavy metals are all meet the requirements of Green Trade Standards of Importing&Exporting Medicinal Plants&Preparations.
RESUMO
OBJECTIVE:To establish the ion chromatography for the mass fractions of 9 inorganic anions (fluoride ion,for-mate radical,chloride ion,nitrite radical,bromide ion,nitrate radical,sulfate radical,oxalate radical and phosphate radical) in Ganmao qingre granules. METHODS:Ion chromatograph was used. The column was Ion Pac AS11-HC with the mobile phase of po-tassium hydroxide solution by gradient elution(concentration:30 mmol/L,time:15 min),the column temperature was room tem-perature,the volume was 25 μl. RESULTS:The 9 inorganic anions were basically achieved separation and had good linear relation-ship with r of 0.999 2-0.999 9,respectively;RSDs of precision,stability and reproducibility tests were less than 3.50%. Average re-covery was 92.47%-103.51%(RSD=0.42%-3.41%,n=6),respectively. CONCLUSIONS:The established method is fast,accu-rate,sensitive and repeatable and can be used for the determination of 9 inorganic anions in Ganmao qingre granules.