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??OBJECTIVE To investigate a rapid approach for quality evaluation of Huoxiang Zhengqi Tincture. METHODS Hesperidin, glycyrrhizic acid, imperatorin, honokiol, isoimperatorin, magnolol and atractylodin in Huoxiang Zhengqi Tincture were determined by ultra performance liquid chromatography (UPLC) method combined with wavelength switching detection technology. The sample was injected directly without preprocessing. The separation was performed on an ACQUITY UPLC BEH C₁₈ (2.1 mm??100 mm, 1.8 ??m) and the column temperature was maitained at 40 ??. The mobile phase was composed of acetonitrile and 0.1% phosphoric acid with gradient elution at a flaw rate of 0.3 mL??min^-1. Hesperidin was detected at 284 nm; glycyrrhizic acid was detected at 250 nm; imperatorin, honokiol, isoimperatorin and magnolol were detected at 300 nm; atractylodin was detected at 340 nm. RESULTS The calibration curves of the seven components showed good linearity within their test ranges. The average recoveries for hesperidin, glycyrrhizic acid, imperatorin, honokiol, isoimperatorin, magnolol and atractylodin were 99.3%, 99.5%, 101.5%, 99.3%, 100.6%, 99.0% and 99.6%, respectively. And there were great variations among the contents of glycyrrhizic acid, imperatorin, isoimperatorin and atractylodin in 28 batches of samples from 13 manufactures. CONCLUSION The proposed method is accurate, simple and rapid, thus providing basis for comprehensive quality control of Huoxiang Zhengqi Tincture.     

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??OBJECTIVE To develop an HPLC method for simultaneous determination of seven tannins in Chebulae Fructus, including gallic acid, chebulic acid, corilagin, ethyl gallate, ellagic acid, chebulagic acid and 1,2,3,4,6-O-pentagalloylglucose and determine the contents of the seven tannins in Chebulae Fructus Retz from different areas.METHODS The HPLC analysis was carried out on an Hypersil ODS2 C₁₈ (4.6 mm??250 mm,5 ??m) column with acetonitrile (A) and 0.05% formic acid solution in water (B) as mobile phase in a linear gradient elution mode. The UV detection wavelength was set at 290 nm and the flow rate was 1.0 mL??min^-1.RESULTS The calibration curves of the seven tannins all showed good linearity (r??0.999 8). The recovery rates were in the range of 95.2% to 98.4%. All the seven tannins could be detected in the two kinds of Chebulae Fructus Retz from eight regions, but the amounts of these tannins varied significantly. The contents of the seven tannins active ingredients in Chebulae Fructus of Terminalia chebula Retz from Hainan, Guangxi, Guangdong and Xinjiang were much higher than those from other areas, while those in Chebulae Fructus of Terminalia chebula Retz. var. tomentella Kurt were higher in Guangdong and Guangxi than other areas.CONCLUSION The method is proved to be accurate and valid, and can be used for the quality control of Terminalia chebula Retz.     

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??OBJECTIVE To establish a high performance capillary electrophoresis (HPCE) method for simultaneous determination of seven nucleosides and nucleobases, including adenine, uracil, adenosine, hypoxanthine, uridine, guanosine, and inosine in Inonotus obliquus samples of different batches. METHODS Based on the mode of HPCE, uncoated fused silica capillary (75 ??m??64.5 cm , 56 cm of effective length ) was used with separation voltage of 20 kV. The 55 mmol??L^-1 sodium borate solution was selected as the running buffer solution (pH 9.5). The detection wavelength was set at 260 nm. The sample was injected at 5 kPa??6 s and column temperature was maintained at 30 ??. RESULTS Good linear relationship was obtained between the response peak areas and the concentrations of all the seven nucleosides (r>0.998 8). The average recoveries of the method were between 96.46%-102.12%. The contents of the seven nucleosides in the Inonotus obliquus samples of different origins were different. CONCLUSION The established method is reliable, accurate, and can be used for the quality control of Inonotus obliquus.     

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??OBJECTIVE To develop an RP-HPLC method for simultaneous determination of rosmarinic acid, tilianin, luteolin-7-O-??-D-glucuronide, apigenin-7-O-??-D-glucuronide, and diosmetin-7-O-??-D-glucuronide in different parts of Dracocephalum moldevica L. METHODS The five constituents were measured on a Shim-pack ODS column(4.6 mm??250 mm, 5 ??m)with gradient elution of acetonitrile (A)-0.5% formic acid aqeous solution (B) (0-30 min, 17%A;30-60 min, 17%-28%A; 60-70 min, 28%A) at a flow rate of 1.0 mL??min^-1.The detection wavelength was set at 330 nm, and the column temperature was maitained at 35 ??. RESULTS The linear ranges of rosmarinic acid, tilianin, luteolin-7-O-??-D-glucuronide, apigenin-7-O-??-D-glucuronide, and diosmetin-7-O-??-D-glucuronide were 4.2-126 ??g??mL^-1 (r=0.999 2), 7.84-235.2 ??g??mL^-1 (r=0.999 3), 3.048-91.44 ??g??mL^-1(r=0.999 4), 1.472-44.16 ??g??mL^-1(r=0.999 4), and 2.816-84.48 ??g??mL^-1 (r=0.999 2), respectively.The average recoveries (RSD) of the five compounds were 98.97%(1.03%), 99.90%(0.92%), 99.89% (1.75%), 99.55% (0.98%), and 99.76%(1.19%) (n=6), respectively. CONCLUSION The developed method is accurate and precise, which can be used for the quality control of different parts of Dracocephalum moldevica L.The RESULTS of content determination indicate that the five compounds exist in all the parts of Dracocephalum moldevica L., but the mass fractions are obviously different.     

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??OBJECTIVE To establish an improved LC method combined with pulsed electrochemical detection for the analysis of etimicin sulfate. METHODS The mobile phase was composed of 40 mL of acetonitrile and 960 mL of an aqueous solution containing 15 mL??L^-1 of trifluoroacetic acid,500 ??L??L^-1 of pentafluoropropionic acid, 8 mL??L^-1of sodium hydroxide (50%) and 1.5 g??L^-1of sodium sulfate. The pH of the aqueous solution was adjusted to 3.5 with 50% NaOH solution. A pulsed electrochemical detector, which was kept at 35 ?? in a hot air oven was adopted. The electrochemical cell consisted of a working electrode, a pH-Ag/AgCl reference electrode and a titanium counter electrode. The working electrode was a gold electrode (diameter 3 mm)and a quadruple-potential waveform (QPW) was selected as detection waveform. The 0.8 mol??L^-1 NaOH solution was added post column at a flow rate of 0.4 mL??min^-1. RESULTS In total, 22 impurities could be separated. The LOD and LOQ of etimicin were found to be 2 ng and 6 ng respectively. The linearity of the calibration curve for etimicin ranged from 0.24 to 45 ??g??mL^-1 with a coefficient of correlation equal to 0.999 7. The repeatability RSDs (n=6) of the content and total impurities in one sample were 0.7% and 1.72% respectively. The inter-day repeatability RSDs (n=18) of the content and total impurities in one sample were 0.98% and 1.71% respectively. The sample solution was stable within 12 h. CONCLUSION Compared with previously published methods, this improved method shows higher sensitivity, better separation ability and robustness and has been incorporated by the Chinese Pharmacopoeia (Ch.P.) 2015 for analysis of etimicin sulfate.     

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??OBJECTIVE To establish the high performance liquid chromatography (HPLC) fingerprint of the caulis of Chimonanthus nitens and evaluate the product quality by chemometrics analysis method. METHODS The method was developed on an Amethyst C₁₈-H column(4.6 mm??250 mm, 5 ??m)by gradient elution with acetonitrile-water (containing 0.1% formic acid) as mobile phase at a flow rate of 0.8 mLmin^-1. The column temperature was maintained at 28 ??, and the detection wavelength was set at 254 nm. The main characteristic peaks was identified by comparing the retention time and UV absorption characteristics. Then 10 batches of the caulis of Chimonanthus nitens were evaluated by similarity assay, HCA, and PCA. RESULTS The HPLC fingerprint of the caulis of Chimonanthus nitens was established and three main peaks were identified. The similarity of 10 batches of the caulis of Chimonanthus nitens was about 0.978 0 to 0.991 9. CONCLUSION The established method can be used for the quality control of the caulis of Chimonanthus nitens.     

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??OBJECTIVE To discuss whether the difference in dissolution profile in vitro may cause different bioavailability in vivo and investigate the effects of the key quality parameters of leflunomide on bioavailability.METHODS Using SANOFI product as the reference preparation and domestic product as the test preparation, the disintegration solution of leflunomide tablets was analyze by Morphologi G3-ID automated measurement to get the paricile size and size distribution of the API; using pH 6.5 FaSSIF solution without adding ox-gall sulfonic acid sodium and lecithin as the dissolution medium, the dissolution and permeation profiles of the reference and test preparations and raw material were compared at 37 ?? with rotate speed of 150 r??min^-1. The influence of quality parameters on the process of API??s release and absorption was investigated, then the difference between the reference and test preparations were compared to preliminarily predict the bioavailability and bioequivalence.RESULTS The particle size Dv(50)of domestic leflunomide tablets was 79.80 ??m, while the particle size Dv(50)of the reference product was 17.60 ??m; the dissolution rate and penetration rate of the test preparation were about 70% of the the reference preparation, the t_max was basically identical,but the ??_max and AUC_0-t were lower than the reference preparation. The bioavailability of the test preparation was about 90% of the reference preparation.CONCLUSION Though the dissolution profile of domestic leflunomide tablets is not identical to the reference preparation, but the two products were predicted to be bioequivalent.     

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??OBJECTIVE To establish a high-performance capillary electrophoresis (CE) method for determinating gallic acid in commercial Quanshen pieces of two different colors,amaranth and brownish red. METHODS CE-UV method was used in the following condition: BGE 20 mmol??L^-1 sodium borate solution, voltage 20 kV, detection wavelength 290 nm, sample injection 10 s at 5 kPa, capillary temperature room temperature. RESULTS A quantitative method was successfully developed to determine gallic acid in Quanshen pieces within 6 min. The contents of gallic acid in 7 batches of amaranth colored Quanshen pieces were 2.70% (Hubei province), 12.08% and 7.79% (Shandong province), 2.01%, 5.78%, 6.97%, and 4.22% (Hebei province), respectively. The contents of gallic acid in brownish red colored Quanshen pieces were 1.35% (Hubei province), 1.81% and 3.42% (Shandong province), 1.87%, 3.42%, 0.44%, and 1.52% (Hebei province), respectively. CONCLUSION The method is rapid, economical and simple and can provide a powerful quality control measure for Quanshen pieces. The contents of gallic acid in the amaranth colored Quanshen pieces are higher than those in the brownish red colored pieces.     

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??OBJECTIVE To establish an RP-HPLC method for determination of the contents of eplerenone and its related substances. METHODS A RP-HPLC method was developed by using a C₁₈ column (Agilent Poroshell,4.6 mm??100 mm, 2.7 ??m), the mobile phase consisted of H₂O-CH₃CN-MeOH (64??18??18), the flow rate was 1.0 mL??min^-1, and the detection wavelength was set at 240 nm. The diluent was H₂O-CH₃CN-MeOH (50??25??25). RESULTS Eplerenone was well separated from the impurities. For the determination of related substances, the LODs of eplerenone, its intermediate (?? and ??) and related substances (A-E) were 0.03, 0.13, 0.25, 0.05, 0.05, 0.26, 0.07 and 0.12 ng, and the LOQs were 0.12, 0.42, 0.84, 0.18, 0.18, 0.86, 0.22 and 0.41 ng, respectively. The calibration curves of eplerenone and related substances (A-E) had good linear relationship within 0.13-1.53, 0.25-3.03, 0.25-2.99, 0.13-1.61, 0.14-1.63, and 0.13-1.54 ??g??mL^-1(r=0.999 9, n=7), and the correction factors of the related substances (A-E) were all in the range of 0.90-1.10. The average recoveries of the related substances (A-E) were all within 95.0%-105.0% (n=9). For the content determination of eplerenone, the validation test showed good linearity over the range of 12.60-75.63 ??g??mL^-1 (r=0.999 6, n=6) with good repeatability (RSD=0.19%, n=6). CONCLUSION The developed method proves to be simple, accurate, specific and reliable. It can be applied to the determination of eplerenone and its related substances.     

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??OBJECTIVE To establish an HPLC method for simultaneous determination of methylophiopogonone A, methylophiopogonanone A, and methylophiopogonanone B. METHODS Comatex C₁₈ column (4.6 mm??250 mm, 5 ??m)was used for the HPLC analysis. The mobile phase consisted of acetonitrile and water (58??42) and was eluted at the flow rate of 1 mL??min^-1. The column temperature was maitained at 30 ??. The detection wavelength was set at 280 nm. The injection volume was 15.0 ??L. RESULTS The linear regression equations of methylophiopogonone A, methylophiopogonanone A and methylophiopogonanone B were Y=493 321??+31 262(r=0.999 9), Y=605 744??+40 941(r=0.999 9), and Y=586 672??+39 657(r=0.999 9), respectively. The average recovery rates of the three flavones respectively were 100.59%(RSD=1.51%), 99.27%(RSD=1.28%), and 100.04%(RSD=1.33%). CONCLUSION The established method for simultaneous determination of flavone constituents in Ophiopogonis Radix is accurate and sensitive, with good repeatability. It can be applied to the quality evaluation of Ophiopogonis Radix.     

HPLC同时测定蓬子菜中7种成分的含量

目的:利用高效液相色谱配置二极管阵列检测器,旨在建立同时测定蓬子菜中鸢尾苷,saikoisoflavonoside A,槲皮素-3-O-β-D葡萄糖苷,槲皮素,香叶木素,芹菜素和5,4'-二羟基-3,6,7,8,3'-五甲氧基黄酮的方法。方法:Ultimate XB C_(18)色谱柱(4.6 mm×250 mm,5μm);流动相甲醇-0.05%磷酸水溶液梯度洗脱;柱温35℃;流速1.0 m L·min~(-1);检测波长蓬子菜中鸢尾苷,saikoisoflavonoside A,槲皮素-3-O-β-D葡萄糖苷,槲皮素,香叶木素,芹菜素和5,4'-二羟基-3,6,7,8,3'-五甲氧基黄酮为260 nm。结果:蓬子菜中鸢尾苷,saikoisoflavonoside A,槲皮素-3-O-β-D葡萄糖苷,槲皮素,香叶木素,芹菜素和5,4'-二羟基-3,6,7,8,3'-五甲氧基黄酮分别在9.3~186 mg·L~(-1)(r=0.999 4),12.8~256 mg·L~(-1)(r=0.999 3),50~1 000 mg·L~(-1)(r=0.999 3),38.7~774 mg·L~(-1)(r=0.999 5),14.5~290 mg·L~(-1)(r=0.999 2),27.4~548 mg·L~(-1)(r=0.999 7)和8.6~172 mg·L~(-1)(r=0.999 6)呈良好的线性关系,平均回收率分别为98.15%(RSD 2.4%),101.30%(RSD 2.2%),99.18%(RSD1.1%),99.96%(RSD 1.4%),101.88%(RSD 0.9%),100.02%(RSD 2.3%)和101.71%(RSD 1.4%)。结论:该方法操作简单、结果准确,具有较好的重复性和稳定性,可用于同时测定蓬子菜乙酸乙酯有效部位中7种主要有效成分,将为蓬子菜质量控制提供科学依据。     

HPLC同时测定续断中7种成分的含量

目的:建立HPLC同时测定续断中7种成分(当药苷,马钱苷,马钱苷酸,绿原酸,川续断皂苷Ⅵ,续断苷A和续断苷B)含量的方法,为全面评价和控制续断的质量提供科学依据。方法:采用HPLC测定,色谱条件为Venusil HILIC色谱柱(4.6 mm×250 mm,5μm),流动相乙腈(A)-0.1%磷酸水溶液(B)梯度洗脱(0~20 min,95%A;20~40 min,95%~87%A;40~64 min,87%~84%A;64~65 min,84%~78%A;65~80 min,78%~77%A),流速1.0 m L·min-1,柱温30℃,进样量10μL,检测波长235 nm和212 nm。结果:7种成分的分离度良好且在各自浓度范围内与峰面积呈良好线性关系(r≥0.999 9),平均回收率在99.11%~102.24%,RSD均2.0%。13批续断样品中川续断皂苷Ⅵ的含量均符合2015年版《中国药典》规定,但各样本中7种待测成分含量差异较大。绿原酸含量与川续断皂苷Ⅵ含量呈明显正相关,而总环烯醚萜与绿原酸、川续断皂苷Ⅵ无明显相关性。结论:所建立的方法简便、准确、重复性良好,可用于续断药材的多成分同步测定,为该药材的质量控制提供参考。     

HPLC同时测定乳癖消颗粒中7种成分的含量

目的:建立HPLC同时测定乳癖消颗粒中芍药苷、三七皂苷R1、人参皂苷Rg1、连翘苷、哈巴俄苷、人参皂苷Rb1、去氢木香内酯7种成分的含量。方法:采用AlltimaC18色谱柱(4.6 mm×250 mm,5μm);乙腈-水为流动相,梯度洗脱,检测波长203 nm,柱温30℃,流速1.0 mL·min-1。结果:芍药苷、三七皂苷R1、人参皂苷Rg1、连翘苷、哈巴俄苷、人参皂苷Rb1、去氢木香内酯线性范围分别为3.906 25～125μg(r=0.999),9.375～300μg(r=0.999),37.5～1 200μg(r=1.000),2.187 5～70μg(r=0.999),3.75～120μg(r=0.999),25～800μg(r=0.999),0.625～20μg(r=1.000);平均加样回收率分别为97.95%(RSD 0.71%),99.05%(RSD 1.11%),100.70%(RSD 2.46%),102.74%(RSD 0.35%),103.06%(RSD 0.55%),98.25%(RSD 1.68%),100.16%(RSD 1.82%)。结论:本方法方便、稳定、可靠,可用于乳癖消颗粒的质量控制。     

HPLC同时测定双丹胶囊中7种主要成分

目的:建立同时测定双丹胶囊中丹参素、原儿茶醛、芍药苷、迷迭香酸、紫草酸、丹酚酸B、丹皮酚7种有效成分的高效液相色谱分析方法。方法:采用Agilent Zorbax SB-C18色谱柱(4.6 mm×250 mm,5μm),流动相乙腈-0.1%甲酸溶液梯度洗脱,检测波长235 nm,流速1.0 m L·min~(-1),柱温30℃。结果:7种成分的线性范围分别为54.43~544.3,0.96~9.6,2.68~26.8,0.92~9.2,2.16~21.6,9.36~93.6,9.16~91.6 mg·L~(-1),r分别为0.999 7,0.999 6,0.999 5,0.999 3,0.999 2,0.999 7,0.9995。平均加样回收率分别为98.6%(RSD 1.8%),100.2%(RSD 1.9%),100.4%(RSD 2.0%),99.1%(RSD 2.5%),98.8%(RSD 2.3%),100.6%(RSD 1.9%),99.1%(RSD 1.8%)。结论:该分析方法准确可靠,重复性好,能更好地控制双丹胶囊的质量提供科学依据。     

HPLC法同时测定骨折挫伤胶囊中7种成分的含量

目的建立HPLC法同时测定骨折挫伤胶囊中羟基红花黄色素A、血竭素、芦荟大黄素、大黄酸、大黄素、大黄酚和大黄素甲醚的含量。方法采用ZORBAX Eclipse Plus-C18色谱柱(250 mm×4.6 mm,5μm),流动相为乙腈-0.2%磷酸水溶液,梯度洗脱,流速:1.0 mL·min^-1,柱温:35℃,检测波长:403、440、254 nm。结果羟基红花黄色素A、血竭素、芦荟大黄素、大黄酸、大黄素、大黄酚和大黄素甲醚质量浓度分别在2.111~21.11μg·mL^-1(r=0.999 1)、1.483~14.83μg·mL^-1(r=0.999 3)、1.180~11.80μg·mL^-1(r=0.999 7)、0.8182~8.182μg·mL^-1(r=0.999 7)、1.011~10.11μg·mL^-1(r=0.999 7)、1.075~10.75μg·mL^-1(r=0.999 6)和1.045~10.45μg·mL^-1(r=0.999 7)范围内与峰面积呈良好的线性关系;平均回收率(n=6)分别为100.30%(RSD=2.24%)、97.42%(RSD=1.63%)、96.21%(RSD=0.92%)、101.17%(RSD=2.74%)、95.84%(RSD=1.31%)、97.71%(RSD=2.49%)和95.50%(RSD=1.15%)。结论该方法准确度高、重复性好,可为骨折挫伤胶囊的质量控制提供参考。     

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??OBJECTIVE To develop an HPLC method for simultaneous determination of seven active constituents including neochlorogenic acid, chlorogenic acid, cryptochlorogenic acid, quercetin-3-O-??-D-glucuronide, isofraxidin, kaempferol-3-O-??-D-glucuronide and rosmarinic acid in different parts and various collecting time of Sarcandra glabra.METHODS The DIKMA Diamonsil C₁₈(4.6 mm??250 mm,5 ??m) column was used. acetonitrile(A)-0.2%phosphoric acid(B) was used as the mobile phase with gradient elution(0-10 min,5% A??15% A;11-18 min,15% A??25% A;18-25 min,25% A;25-40 min,25% A??40% A),at a flow rate of 1.0 mL??min^-1. The detection wavelength was set at 344 nm and the column temperature was maintained at 35 ??.RESULTS The calibration curves of neochlorogenic acid, chlorogenic acid, cryptochlorogenic acid, quercetin-3-O-??-D-glucuronide, isofraxidin, kaempferol-3-O-??-D-glucuronide and rosmarinic acid were in good linearity over 9.32-466.00, 11.25-562.50, 10.94-547.00, 8.68-434.00, 10.48-524.00, 9.66-483.00 and 10.86-543.00 ??g??mL^-1 (r=0.999 6-0.999 9), respectively. The average recoveries (n=6)were in the range of 99.0%-101.5% and RSD were in the range of 0.85%-1.8%. The optimal parts and collecting time of Sarcandra glabra are aerial parts and from September to November according to the comprehensive evaluation.CONCLUSION The method is precise and reliable, can be used to determin the content of seven chemical constituents in Sarcandra glabra and provide a reference for collecting in cultivate area.     

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??OBJECTIVE To develop an UPLC method for simultaneous determination of seven components in Gardenia jasminoides, ie, gardoside, shanzhiside, deacetyl asperulosidic acid methyl ester, gardenoside (RG), genipin-1-??-D-gentiobioside, chlorogenic acid, and gardenoside to evaluate the quality of Gardenia jasminoides. METHODS ACQUITY UPLC HSS T3 column was used for the UPLC analysis. The mobile phase was acetonitrile-0.05% phosphoric acid solution. Gradient elution was conducted at a flow rate of 0.2 mL??min^-1. The column temperature was maitained at 30 ?? and detection wavelength was set at 238 nm. A linear model was obtained through principal component analysis (PCA), and the scores of the principal components were used to evaluate the quality of Gardenia jasminoides Alba decoction pieces comprehensively. RESULTS The seven components could be well separated from each other with good specificity, precision,repeatability,linearity,recovery rate and stability.The 25 Gardenia jasminoides Ellis samples and two Gardenia jasminoides Ellis var.grandiflora Nakai samples conformed to the quality requirements in the chapter of gardoside, shanzhiside, deacetyl asperulosidic acid methyl ester, gardenoside(RG), genipin-1-??-D-gentiobioside, chlorogenic acid, gardenoside. As the comprehensive evaluation shown, the quality of wild Gardenia jasminoides samples from Jiangxi province was better; Gardenia jasminoides from inland provinces excelled those from coastal provinces; and Gardenia jasminoides across Jiangxi province were of stable and higher quality. CONCLUSION The method established in this study can effectively assay geniposide, gardoside, shanzhiside, deacetyl asperulosidic acid methyl ester, gardenoside and genipin gentiobioside in Gardenia jasminoides, thus it can be used for the quality control of Gardenia jasminoides.     

HPLC同时测定香蜂花药材中的3种有效成分

目的： 建立一种同时测定香蜂花药材中迷迭香酸、咖啡酸和咖啡酸乙酯含量的RP-HPLC分析法。方法： Hanbon Megres C₁₈色谱柱 （4.6 mm×250 mm, 5 μm）,流动相A为甲酸-乙腈-水（0.5:20:80）,B为甲酸-甲醇-乙腈（0.5:40:60）,梯度洗脱（0%~25 min,0%~45% B;25%~30 min,45%~100% B;30%~30.1 min,100%~0% B）,流速1.0 mL·min^-1,柱温35℃,检测波长330 nm。结果： 迷迭香酸、咖啡酸和咖啡酸乙酯分别在6.0~300.0,0.15~7.5 mg·L^-1和0.15~7.5 mg·L^-1线性关系良好,平均加样回收率（n=6）分别为99.48%,99.56%,101.7%。结论： 该方法准确,简便,适用于香蜂花药材的质量分析检验。     

HPLC同时测定牛皮杜鹃中3种成分的含量及其提取方法的比较

目的:建立HPLC同时测定长白山牛皮杜鹃中芦丁、槲皮素及山柰酚含量的方法,并比较不同提取方法对其含量的影响。方法:采用Agilent Eclipse XDB-C18色谱柱(4.6 mm×250 mm,5μm);乙腈-0.1%磷酸水溶液进行梯度洗脱;检测波长为360 nm,流速为0.8 m L·min-1,柱温为30℃。结果:芦丁、槲皮素、山柰酚的在一定范围内线性关系均良好;平均加样回收率分别为99.9%(RSD 1.2%),99.2%(RSD 2.8%),101.8%(RSD 2.3%)。结论:该方法简便、快速、准确可靠。3种不同提取方法中以超声提取法所得黄酮类含量均最高。可用于长白山牛皮杜鹃的质量控制。     

HPLC-DAD波长转换法同时测定不同产地滇桂艾纳香中4种成分的含量

目的:建立滇桂艾纳香药材中原儿茶酸、绿原酸、咖啡酸和芦丁4种成分的含量测定方法,同步测定4种成分含量,为滇桂艾纳香药材的质量控制提供参考。方法:采用HPLC转换波长法,Inertsil ODS-3色谱柱(4.6 mm×250 mm,5μm),以乙腈(A)-0.1%磷酸水溶液(B)为流动相进行梯度洗脱(0~25 min,10%~18%A;25~45 min,18%~40%A),检测波长256 nm(0~15 min,原儿茶酸),327 nm(15~30 min,绿原酸、咖啡酸),360 nm(30~60 min,芦丁),柱温20℃,流速1.0 m L·min-1。结果:滇桂艾纳香中原儿茶酸、绿原酸、咖啡酸、芦丁进样量分别在0.007~0.13μg(r=0.999 98),0.219~4.38μg(r=0.999 94),0.014~0.28μg(r=0.999 97),0.049~0.98μg(r=0.999 97)与峰面积呈良好的线性关系,平均加样回收率分别为98.84%(RSD 2.2%),101.16%(RSD 0.9%),98.00%(RSD 2.8%),101.73%(RSD 1.4%)。含量测定结果显示,百色平果县所产药材中原儿茶酸、绿原酸和芦丁含量均较高,百色靖西县和四川药材咖啡酸含量较高。结论:所建立的方法稳定可靠,灵敏度高,重复性好,可同时测定滇桂艾纳香药材中原儿茶酸、绿原酸、咖啡酸和芦丁4种成分的含量,可为滇桂艾纳香药材质量评价提供参考。