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Objective To discuss the effect of Anemarrhenae Rhizoma with different proportions on the dissolution of 6 inorganic elements(K,Ti,Sr,Ba,Ca,Mg)in Gypsum Fibrosum under different compatibility based on grey correlation analysis and technique for order preference by similarity to an ideal solution(TOPSIS)method and to provide reference for clinical application.Methods Inductively coupled plasma mass spectrometry(ICP-MS)was established for simultaneous analysis of inorganic elements K,Ti,Sr,Ba,Ca,Mg in Gypsum Fibrosum-Anemarrhenae Rhizoma.The gray correlation ananlysis and TOPSIS method were used to comprehensively analyze the changes of six inorganic elements in Gypsum Fibrosum under different compatibility.Results The findings of the ICP-MS determination of inorganic elements in Gypsum Fibrosum-Anemarrhenae Rhizoma were good in terms of linearity,precision,repeatability and stability.The average recovery was 81.78％-104.13％,and the RSD was 2.10％-4.62％(n=6).The dissolution of six inorganic elements in Gypsum Fibrosum after compatibility with different proportions of Anemarrhena Rhizoma was significantly higher than that of Gypsum Fibrosum single decoction(P＜0.05).The dissolution scores of six inorganic elements in Gypsum Fibrosum were the highest when the compatibility proportion of Gypsum Fibrosum-Anemarrhenae Rhizoma was 30∶9.Conclusion ICP-MS is a sensitive and accurate method for determining K,Ti,Sr,Ba,Ca and Mg in Gypsum Fibrosum-Anemarrhenae Rhizoma.The best compatibility ratio of Gypsum Fibrosum-Anemarrhenae Rhizoma is 30:9,which can effectively improve the dissolution of six inorganic elements in Gypsum Fibrosum,and provide the basis for the further compatibility study of Gypsum Fibrosum and Anemarrhenae Rhizoma.

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Objective: To establish a method for the determination ofsamarium oxide and lanthanum oxide by inductively coupled plasmamass spectrometryin the air of workplace. Methods: Samarium, lanthanum and their compounds in the air of workplace were collected through microporous filter. The samples were digested by nitricacid and perhydrol (V/V=4∶1) and detected by inductively coupled plasmamass spectrometry. Results: The linear range ofsamarium oxide and lanthanum oxide was 0-50.00 µg/L, Sm(2)O(3): y=0.0119x, r=0.9999; La(2)O(3): y=0.0617x, r=0.9998. The detection limits were less than 0.1 µg/L, and the minimum detection concentration were less than 1.52×10(-5) mg/m(3). The sampling efficiency were 100%, the recovery rates were 95.70%-102.01%, and the precision were 0.78%-1.58%. Conclusion: The indicators established in this study are conformed with the requirements of Chinese Occupational Standars of GBZ/T 210.4-2008, "The Guidelines for the Development of Occupational Hygiene StandarsMehods Part 4: Determination of Chemical Substances in the Air of Workplace".

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Objective@#To establish a method for the determination ofsamarium oxide and lanthanum oxide by inductively coupled plasmamass spectrometryin the air of workplace.@*Methods@#Samarium, lanthanum and their compounds in the air of workplace were collected through microporous filter. The samples were digested by nitricacid and perhydrol (V/V=4∶1) and detected by inductively coupled plasmamass spectrometry.@*Results@#The linear range ofsamarium oxide and lanthanum oxide was 0-50.00 μg/L, Sm2O3: y=0.0119x, r=0.9999; La2O3: y=0.0617x, r=0.9998. The detection limits were less than 0.1 μg/L, and the minimum detection concentration were less than 1.52×10-5 mg/m3. The sampling efficiency were 100%, the recovery rates were 95.70%-102.01%, and the precision were 0.78%-1.58%.@*Conclusion@#The indicators established in this study are conformed with the requirements of Chinese Occupational Standars of GBZ/T 210.4-2008, "The Guidelines for the Development of Occupational Hygiene StandarsMehods Part 4: Determination of Chemical Substances in the Air of Workplace".

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OBJECTIVE: To study the levels of Pb, Se, As and Hg in brick-teas from main producing areas in China and evaluate the safety. METHODS: A total of 31 samples of brick tea from seven provinces where minority nationalities were accustomed to drinking a large quantity of brick tea were collected, Pb concentrations were determined by inductively coupled plasma-mass spectrometry, and concentrations of As, Se, Hg were detected by hydride generation atomic fluorescence spectrometry. The data were analyzed by SPSS 22. 0 software. RESULTS: The average lead levels in brick tea was 6. 232 mg/kg, which exceeded the limit standard of GB 2762-2012. There was a great difference of Pbconcentrations among the various kinds of brick tea producing in different provinces, and the lower Pb concentrations detected in Tuo tea and Puerh tea producing in Yunnan Province, was 1. 337 mg/kg, and the highest determined in Kang brick producing in Sichuan Province, was 9. 998 mg/kg. In addition, the concentrations of As and Hg were all below the limit standard of NY 659-2003. For people accustomed to drinking brick tea for a long term, the average intake amounts of Pb, As, Hg through brick tea contributed 13. 63%, 1. 71% and 0. 29% to dietary Pb, As, Hg of the provisional tolerable weekly intake( PTWI) recommended by Joint FAO/WHO Expert Committee of Food Additives( JECFA) which was in safe range. Otherwise, the daily selenium intake through brick tea was 0. 188 µg, which contributed 0. 38% to the selenium recommended nutrient intake( RNI) by Chinese Nutrition Society. CONCLUSION: Excessive levels of lead in the brick tea is prominent. As, Hg and Se in brick tea are in low exposure level.

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