Abtract Objective:To establish a graphite furnace atomic absorption spectroscopy,and to determine the content of aluminum in the hemofiltration base solution.Methods:The standard addition method of atomic absorption of graphite furnace was used to add matrix modifier to determine the content of aluminum.Results:Aluminum has a good linear relationship in the range of 0-20 μg·L-1,r=0.998;The detection limit concentration was 0.91 μg·L-1.The average recovery rate was 96.5％.The results of the three batches were 3.299,1.232 and 2.431 μg·L-1,respectively.Conclution:This method can effectively measure the content of aluminum in hemofiltration base solution products,and control the raw materials,production and packaging of products that may introduce pollution pathways.It is recommended that enterprises pay attention to the detection of aluminum content in the on hemofil-tration base solution to minimize the risk of contamination and ensure the quality of products.

Objective:To develop an HPLC method with gradient elution for the simultaneous determination of 4 bacteriostatic agents in triamcinolone acetonide econazole cream from the different manufacturers.Methods:The test was performed on a Waters Symmetry C18 column(250 mm ×4.6 mm,5 μm)under gradient elution of metha-nol(A)and methanol-0.02 mol·L-1 sodium dihydrogen phosphate solution(B).The flow rate of 1.0 mL·min-1 and the column temperature was 35 ℃.The detection wavelengths were 228 nm and 254 nm.Results:The good separation of the bacteriostatic agents peaks were achieved.The linear ranges of benzoic acid,methyl hydroxybenzoate,ethylparaben and propylparaben fell into 0.010 348-0.155 22 mg·mL-1,0.009 876-0.148145 mg·mL-1,0.010 106-0.151 588 mg·mL-1 and 0.010 259-0.153 882 mg·mL-1 respectively.The av-erage recoveries were 99.68％(RSD=2.35％),100.21％(RSD=1.78％),100.47％(RSD=1.59％)and 100.06％(RSD=1.65％)respectively.The LODs were 3 × 10-5 mg·mL-1,1.67 × 10-5 mg·mL-1,1.67 × 10-5 mg·mL-1 and 1.67 × 10-5 mg·mL-1 respectively.Conclusion:The established method is sensitive and accurate,and has the good separation.It provides the reliable basis for the quality control of triamcinolone ace-tonide econazole cream.

OBJECTIVE: To investigate the hepatoprotective effect of Xijiao Dihuang Decoction (, XJDHD) on lipopolysaccharide (LPS)- and tumor necrosis factor alpha (TNF-α)-induced acute liver failure (ALF) as well as the underlying mechanism of action, and to clarify the key herbs and components of XJDHD. METHODS: LPS/D-galactosamine (D-GalN) or TNF-α/D-GalN were intraperitoneally injected into C57BL/6J mice to induce ALF. Simultaneously, XJDHD or its individual herbs and components were orally administered. Survival rates, transaminase levels in serum, and hepatic histology were examined to evaluate the effects of XJDHD. The terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay and real-time polymerase chain reaction were additionally performed to expound the mechanism underlying the anti-apoptotic activity of XJDHD. RESULTS: Oral administration of XJDHD protected mice from lethal liver failure induced by LPS and TNF-α, with notable amelioration of liver injury in histology and a significant decrease in transaminase levels in serum. XJDHD significantly inhibited apoptosis of hepatocytes and enhanced expression of the antiapoptosis genes, c-Flip, Iap1, Gadd45b and A20. In addition, Rehmannia glutinosa Libosch. was identified as the key herb of XJDHD and galactose as the effective component of Rehmannia glutinosa Libosch. that protects against ALF. CONCLUSIONS XJDHD inhibits TNF-α-induced apoptosis of hepatocytes by promoting the expression of nuclear factor κ B-regulated anti-apoptotic genes. Rehmannia glutinosa Libosch. is the effective herb of XJDHD and galactose is an active component in this protection.