Quantitation and content investigation of bilirubin in cultured cow-bezoar / 中国中药杂志

A determination method for bilirubin in cultured cow-bezoar was developed in this study, with which the bilirubin in 15 batches of samples was quantified. The samples were first processed with 10% oxalic acid solution for the conversion of bilirubin from conjugated to unconjugated, followed by the extraction with dichloromethane. Then the obtained sample solutions were analyzed at 450 nm by HPLC[chromatographic column: Agilent TC-C_(18)(4.6 mm × 250 mm, 5 μm); mobile phase: acetonitrile and 1% glacial acetic acid aqueous solution(95∶5); flow rate: 1.0 mL·min~(-1)]. The bilirubin content in the 15 batches of cultured cow-bezoar was ranged from 21.9% to 41.7% with the average of 32.4%. The proposed method is accurate and reliable, thus making it suitable for the quantitation of bilirubin in cultured cow-bezoar and its quality assessment and control.

Determination of the Contents of Heavy Metals and Harmful Elements in Pediatric ，Paracetamol，Atificial Cow- bezoar and Chlorphenamine Maleate Granules by ICP-MS / 中国药房

OBJECTIVE：To es tablish a method for the content determination of heavy metals [lead （Pb），cadmium（Cd）， copper （Cu）， mercury （Hg）] and harmful elements [arsenic （As）] in Pediatric paracetamol artificial cow-bezoar and chlorphenamine maleate granules. METHODS ：The samples were conducted pretreatment by microwave digestion instrument and determined by inductively coupled plasma mass spectrometry （ICP-MS）using elements germanium ，indium，bismuth as internal standard. RESULTS ：The linear ranges of Pb ，As，Cu，Cd and Hg were 1-20，0.5-10，5-100，0.5-10 and 0.2-4 ng/mL， respectively （all r＞0.997）. The limits of detection （LODs） were 0.041 1，0.013 2，0.057 3，0.009 0，0.005 4 ng/mL， respectively. The limits of quantification （LOQs）were 0.137 0，0.044 0，0.191 0，0.030 0，0.018 0 ng/mL，respectively. RSDs of precision and repeatability tests were all less than 6％. RSDs of stability tests （28 h）of Pb ，As，Cu and Cd were all less than 5％， and that of stability test （28 h）of Hg was less than 7％. The average recoveries were 89.44％（RSD＝5.87％，n＝9），99.56％ （RSD＝5.46％ ，n＝9），96.12％（RSD＝4.62％ ，n＝9），105.82％（RSD＝2.80％ ，n＝9）and 90.23％（RSD＝3.59％ ，n＝9）， respectively. Five elements were all detected in 63 batches of samples ，and the contents of them were 0.191 0-1.527 6，0.002 5- 0.047 4，0.034 1-1.549 0，0.001 5-0.078 8 and 0.001 9-0.005 4 mg/kg，respectively. CONCLUSIONS ：The method is simple ， sensitive and accurate. It is suitable for simultaneous determination of 5 elements in Pediatric paracetamol artificial cow-bezoar and chlorphenamine maleate granules.

Investigation of chemical profile of bile acids and determination of them in cultured Bovis Calculus with UPLC-QDA / 中国中药杂志

In this study, 10 batches of samples of cultured Bovis Calculus(cow-bezoar) were determined for the investigation of chemical profile of bile acids with the UPLC-QDA method established. The results showed that nine common bile acids, cholic acid(CA), deoxycholic acid(DCA), chenodeoxycholic acid(CDCA), taurocholic acid(TCA), taurodeoxycholic acid(TDCA), taurochenodeoxycholic acid(TCDCA), glycocholic acid(GCA), glycodeoxycholic acid(GDCA) and glycochenodeoxycholic acid(GCDCA), were founded in samples and 7 bile acids were quantified except GDCA and GCDCA. In these samples, unconjugated bile acids, the major type of bile acids, accounted for more than 97% of all types of bile acids. As for unconjugated bile acids, CA was the most major bile acid in cultured cow-bezoar and it was about twice as much as DCA. The relative low-cost method established in the current study is accurate, rapid and sensitive, which is suitable for the studies of other drugs from animal bile.

Study of characteristic ions in frequently-used traditional Chinese medicinal materials derived from animal bile and its application / 中国中药杂志

A LC-MS method was established for study of characteristic ions in frequently-used traditional Chinese medicinal materials derived from animal bile. UPLC-Q-TOF was used in the data acquisition work, then, the software of MarkerLynxTM v.4.1 was performed in the chemometric analysis of data. Besides, selected ion chromatograms of these bile acid ions were comparative studied. Better results were gained in the specificity identification of pig bile, bear bile, cultivated cow-bezoar , artificial cow-bezoar and some compound preparations(Hugan tablet and Rengongniuhuang Jiaxiaozuo capsule) by this method. The method is suitable for the specificity identification of pig bile, bear bile, cultivated cow-bezoar , artificial cow-bezoar and compound preparations containing these medicinal materials.

Multi-component quantitation of artificial cow-bezoar and study on its markers of quality difference / 中国中药杂志

An HPLC-ELSD method for quantitation of GCANa, CA, HDCA, CDCA and DCA in artificial cow-bezoar was developed in this study. The chromatographic separation was performed using a Wondasil CC₁₈(4.6 mmχ250 mm，5 μm) column at a column temperature of 25 °C and liquid flow-rate of 1.0 mL·min⁻¹. Acetonitrile and 0.2% formic acid solution were used as mobile phase with a linear gradient and injection volume was 10 μL. An ELSD was used with a nitrogen flow-rate of 2.3 L·h⁻¹at a drift tube temperature of 110 °C. Some chemometric methods were applied in data procession and analysis for exploration of the markers of quality difference. The accurate and simple method is suitable for the quality evaluation and the quality control of artificial cow-bezoar.

Analysis of Artificial Cow-Bezoar by Near-Infrared Spectroscopy Coupled with Competitive Adaptive Reweighted Sampling Method / 中国药学杂志

OBJECTIVE: To analyze and study the characteristic variables of wavelength in near-infrared spectroscopy of artificial cow-bezoar. METHODS: A method of near-infrared spectroscopy coupled with competitive adaptive reweighted sampling(CARS) was performed in characteristic variables of wavelength screening for the qualitative and quantitative researches, respectively. RESULTS: Some characteristic variables of wavelength, 0.48%-4.44% of all variables of wavelength, were screened out by CARS for different models. Not only the number of variables for building models decreased significantly, but also the index parameters for evaluating model became better. CONCLUSION: This method is suitable for quality evaluation and quality control for artificial cow-bezoar.

The analysis of multivariate image and chemometrics in TLC fingerprinting of artificial cow-bezoar / 中国中药杂志

A method of thin-layer fingerprinting chromatogram of artificial cow-bezoar was established with the developing solvent consisting of cyclohexane, ethyl acetate, acetic acid and methanol (2∶7∶1∶2), and 10% sulfuric acid ethanol solution sprayed as colour-developing agent. After heated at 105 ℃, TLC was recorded as an image in ultraviolet light at 366 nm which was converted into grayscale. By the gray value extracted from the grayscale, the multivariate data obtained from TLC of samples could be analyzed by chemometric method. The results indicated that samples from different manufacturers could be distinguished by this method and some specific bands were found out. All in one, this simple and practical method was suitable for the evaluation of quality difference.

Determination of Related Substances in Pediatric Paracetamol Artificial Cow-bezoar and Chlorphenamine Maleate Granules by HPLC / 中国药师

Objective:To establish an HPLC method for the determination of p-aminophenol in pediatric paracetamol artificial cow-bezoar and chlorphenamine maleate granules. Methods: A CAPCELL PAK MGⅡC18 (150 mm × 4. 6 mm,5 μm) chromatographic column was used with 0. 05% ammonium acetate solution-methyl (85∶ 15) as the mobile phase at the flow rate of 1 ml·min-1 , the detection wavelength was 232nm,the injection volume was 10μl,and the column temperature was 30℃. Results:The linear range of p-aminophenol was 9. 878 4-197. 568 0 ng(r = 0. 999 1), the average recovery was 99. 8%(RSD = 0. 9%,n= 9), and detection limit was 2ng. Conclusion:The method is simple, specific and accurate, which can be used to determine the contents related substances in of pediatric paracetamol artificial cow-bezoar and chlorphenamine maleate granules.