• Title/Summary/Keyword: HPLC-UV method

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Qualitative and quantitative analysis of the saponins in Panax notoginseng leaves using ultra-performance liquid chromatography coupled with time-of-flight tandem mass spectrometry and high performance liquid chromatography coupled with UV detector

  • Liu, Fang;Ma, Ni;He, Chengwei;Hu, Yuanjia;Li, Peng;Chen, Meiwan;Su, Huanxing;Wan, Jian-Bo
    • Journal of Ginseng Research
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    • v.42 no.2
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    • pp.149-157
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    • 2018
  • Background: Panax notoginseng leaves (PNL) exhibit extensive activities, but few analytical methods have been established to exclusively determine the dammarane triterpene saponins in PNL. Methods: Ultra-performance liquid chromatography coupled with time-of-flight mass spectrometry (UPLC/Q-TOF MS) and HPLC-UV methods were developed for the qualitative and quantitative analysis of ginsenosides in PNL, respectively. Results: Extraction conditions, including solvents and extraction methods, were optimized, which showed that ginsenosides Rc and Rb3, the main components of PNL, are transformed to notoginsenosides Fe and Fd, respectively, in the presence of water, by removing a glucose residue from position C-3 via possible enzymatic hydrolysis. A total of 57 saponins were identified in the methanolic extract of PNL by UPLC/Q-TOF MS. Among them, 19 components were unambiguously characterized by their reference substances. Additionally, seven saponins of PNL-ginsenosides Rb1, Rc, Rb2, and Rb3, and notoginsenosides Fc, Fe, and Fd-were quantified using the HPLC-UV method after extraction with methanol. The separation of analytes, particularly the separation of notoginsenoside Fc and ginsenoside Rc, was achieved on a Zorbax ODS C8 column at a temperature of $35^{\circ}C$. This developed HPLC-UV method provides an adequate linearity ($r^2$ > 0.999), repeatability (relative standard deviation, RSD < 2.98%), and inter- and intraday variations (RSD < 4.40%) with recovery (98.7-106.1%) of seven saponins concerned. This validated method was also conducted to determine seven components in 10 batches of PNL. Conclusion: These findings are beneficial to the quality control of PNL and its relevant products.

Simultaneous Determination of Paeoniflorin, Trans-cinnamic Acid, Schisandrin and Glycyrrhizin in So-Cheong-Ryong-Tang by HPLC-DAD and HPLC-ESI-MS

  • Lee, Mi-Kyeong;Lee, Ki-Yong;Park, Jung-Hyun;Kim, Seung-Hyun;Choi, Ok-Gyung;Park, Jin-Ho;Cho, Jung-Hee;Kim, Do-Hoon;Baek, Ju-Hyun;Oh, Mi-Hyune;Kim, Hyo-Jin;Sung, Sang-Hyun
    • Natural Product Sciences
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    • v.16 no.1
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    • pp.26-31
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    • 2010
  • High performance liquid chromatographic method with diode-array detection (HPLC-DAD) has been performed for the simultaneous determination of four marker constituents, paeoniflorin, trans-cinnamic acid, schisandrin and glycyrrhizin in traditional herbal medicinal preparation, So-Cheong-Ryong-Tang (SCRT). The presence of paeoniflorin, trans-cinnamic acid, schisandrin and glycyrrhizin in this decoction was ascertained by retention time, spiking with each authentic standard, UV spectrum and ESI mass spectrum. All four compounds showed good linearity ($r^2$ > 0.998) in a relatively wide concentration ranges. The RSD for intra-day and inter-day precision was less than 3% and the limits of detection (LOD) were less than 30 ng. The mean recovery of each compound was 94.1-113.0% with RSD values less than 3.0%. These results suggest that the developed HPLC method is simple, effective and could be readily utilized as a quality control method for commercial SCRT products.

Determination of Domoic Acid in Seafood Matrices using HPLC-UV with Solid Phase Extraction Cleanup (고체상 추출 전처리 및 HPLC-UV를 이용한 수산물 중 domoic acid의 분석)

  • Si Eun Kim;Sang Yoo Lee;Ji Eun Park;Hyunjin Jung;Hyang Sook Chun
    • Journal of Food Hygiene and Safety
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    • v.38 no.5
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    • pp.297-304
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    • 2023
  • Domoic acid (DA), a neurotoxin produced naturally by diatoms, is responsible for incidents of amnesic shellfish poisoning. In this study, a modified analytical method was established to determine domoic acid in seafood using solid phase extraction cleanup and optimizing the amount of sample and extraction solvent to reduce interference effects. The modified method using high-performance liquid chromatography with ultraviolet detection was validated using three seafood matrices (mussel, red snow crab, and anchovy) at three concentrations (1, 2, and 4 mg/kg) and compared to the Food Code method. Compared to the Food Code method, the modified method showed better performance in terms of linearity (R2>0.999), detection limit (0.02-0.03 mg/kg), quantification limit (0.05-0.09 mg/kg), intra-/inter-day accuracy (86.2-100.4%), and intra-/inter-day precision (0.2-4.0%). Furthermore, the method was successfully applied for the analysis of 87 seafood samples marketed in Korea, and DA was detected at a low concentration of 140 ㎍/kg in one anchovy sample. These results suggest that the modified method can be used for routine determination of DA in seafood.

A New HPLC-analytical Method for Total Sphingosine Contents as an Indirect Index for the Ganglioside Contents of Deer Antlers

  • Choi, Hye-Ok;Kim, Jeung-Won;Jo, Sung-Jun;Kim, Jung-Hwan;Han, Byung-Hoon
    • Natural Product Sciences
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    • v.17 no.4
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    • pp.315-320
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    • 2011
  • Routinely applicable HPLC assay procedures for the ganglioside content in various deer antler preparations were established through the creation of a UV-absorbing chromophoric substance - trans-${\alpha},{\beta}$-unsaturated-hexadecene-aldehyde - from the sphingosine moiety in ganglioside molecules by two step chemical reactions. In order to guarantee the assay's accuracy and sensitivity, the HPLC-assay procedure adopted internal reference procedures by mixing cis-${\alpha},{\beta}$-unsaturated-hexadecene aldehyde[V] or cis-3-heptadecene- 1,2-diol[IV] to assay samples. The internal reference compound [IV] or [V] was synthesized in our laboratory starting from mannitol-diacetonide through three or four step organic reactions. This new HPLC-assay procedure was successfully applied to deer antler extracts with good dose-dependent calibration curves at the picomole level of gangliosides.

Antioxidant activity analysis of Catechin compounds in Korean green tea using HPLC On-line $ABTS^{+}$ Antioxidant screening system (HPLC On-line $ABTS^{+}$ Antioxidant screening 시스템을 이용한 한국산 녹차로부터 Catechin compounds의 황산화 활성분석)

  • Lee, Kwang-Jin
    • KSBB Journal
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    • v.23 no.1
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    • pp.96-100
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    • 2008
  • In this work, we describes analysis of the antioxidant potential of Korean green tea phenolics using an high-performance liquid chromatography (HPLC) on-line $ABTS^{+}$ antioxidant screening method. In conjunction with the analysis of their 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS+) radical scavenging ability, the extraction of catechine compounds from Korean green tea were performed by various temperature and time. The optimum operating conditions were experimentally determined to analyze the catechine compounds in the pretreatment extracts. From the results, the extraction temperature $60^{\circ}C$, time 3 min was selected as an optimal antioxidant activity condition. The analysis by $C_{18}$ column was performed, the flow rate of mobile phase and UV wavelength was fixed at 1.0 ml/min and 254 nm, respectively. the mobile phase was composed from acetonitrile and water, and the gradient elution mode were applied.

HPLC Analysis of Retinol in the Biological Fluids and Cutaneous Absorption after its Transdermal Administration (레티놀의 생체시료 중 HPLC 분석 및 경피흡수)

  • Chung, Youn-Bok;Han, Kun
    • Journal of Pharmaceutical Investigation
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    • v.30 no.4
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    • pp.283-288
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    • 2000
  • The purpose of the present study was to investigate the topical bioavailability of retinol (vitamin A) after its transdermal administration. For this purpose, we developed the convenient HPLC method to measure the retinol concentration in the biological fluids such as plasma and skin tissues. The low detection limit was $0.1\;{\mu}g/ml$ using a gradient HPLC system of UV detection. The initial plasma concentration of retinol was about $20\;{\mu}g/ml$ after its i.v. bolus administration (4.32 mg/kg). The half life $(t_{1/2{\alpha}})$ in the distributive phase was 1.3 min, while retinol was slowly disappeared in the post-distributive phase. On the other hand, the maximum plasma concentration $(C_{max})$ was about 776 ng/ml after appling to rat skin at a dose of 43.2 mg/kg. Furthermore, the concentration of retinol in the skin tissues was about 600 ng/g tissue at 12 hr after its transdermal administration. In conclusion, the initial plasma concentration of retinol was comparable with the skin concentration after its cutaneous absorption, followed by being decreased with the passage of the time.

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Measurement of the Anti-oxidative Properties of Extract from Medicinal Plants Using an On-line HPLC-DPPH Assay (HPLC와 DPPH radical 소거능 측정 방법의 결합에 의한 약용 식물 추출물의 항산화 활성 비교)

  • Im, Do-Youn;Pyo, Byoung-Sik;Kim, Sun-Min;Lee, Kyoung-In
    • Journal of Life Science
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    • v.27 no.1
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    • pp.44-49
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    • 2017
  • Natural anti-oxidative compounds have important disease prevention and food preservation properties, in addition to anti-bacterial, anti-inflammation, anti-cancer, and skin whitening effects. High-performance liquid chromatography (HPLC), with an ultra vilolet (UV) detector coupled to a reverse phase C18 column and an online measurement system for 1, 1-diphenyl-2-picryl hydrazyl (DPPH) radicals, was used to search for potent antioxidative compounds in crude extracts. The online HPLC-DPPH assay was then applied to confirm antioxidative compounds in water extracts from Radix of Pueraria lobata, Rhizoma of Zingiber officinale, Fructus of Chaenomeles sinensis, Cortex of Ulmus pumila, and Radix of Astragalus membranaceus. To determine the yields of the extracts, the Brix% of each extract solution was measured using a refractometer. When the relative DPPH radical scavenging ability values of the water extracts were compared with those of a positive control (ascorbic acid), the water extracts of P. lobata, C. sinensis, and U. pumila were 7.77%, 4.71%, and 4.19%, respectively. The results suggest that this method provides a useful assay for rapid measurement of DPPH radical scavenging abilities and conformation of antioxidative compounds in natural products. Moreover, it can reduce the time spent on the separation of active compounds from natural materials, such as medicinal plants, in addition to the use of reagents for separation.

Analytical Optimum of Ginsenosides according to the Gradient Elution of Mobile Phase in High Performance Liquid Chromatography (HPLC의 이동상 용매조건에 따른 인삼 Ginsenoside 분석)

  • Park, Ji-Yeong;Won, Jun-Yeon;Lee, Chung-Yeol
    • Korean Journal of Medicinal Crop Science
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    • v.15 no.3
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    • pp.215-219
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    • 2007
  • This study was conducted to analyze not only for the quality guaranteed of red ginseng but also for the minor ginsenosides. Although several studies have reported to analyze ginseng saponins, those were focused to major saponins, including 6 to 7 ginsenosides. As increase of interest in medicinal effect of ginseng products, anasis of various ginsenosides in both red and white ginseng are strongly demanded. To perform optital condition of 12 ginsenoside analysis, We controlled HPLC conditions, such as the gradient elution of the mobile phase. We found the adequate separation method for 12 ginse-nosides. The optimum condition was as following : H$_2$O/CH$_3$CN ratios were 82/18, 70/30, 55/45 and 50/50, respectively. Sol-vent flow rate was 1.00 ma/min. Column temperature was kept to 35$^{\circ}$C. UV detector was set to 203 nm.

Determination of nadolol enantiomers in human plasma using a coupled achiral-chiral high-performance liquid chromatography method

  • Lee, Seung-Beom;Pham, Thuy-Vy;Mai, Xuan-Lan;Le, Thi-Anh-Tuyet;Nguyen, Thi-Ngoc-Van;Kang, Jong-Seong;Mar, Woongchon;Kim, Kyeong Ho
    • Analytical Science and Technology
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    • v.33 no.2
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    • pp.59-67
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    • 2020
  • Nadolol is a β-blocker drug, which effectively manages hypertension and angina pectoris. Its chemical structure allows the formation of four possible stereoisomers. A coupled column high-performance liquid chromatographic (HPLC) system with UV and fluorescence detection was investigated for simultaneously determining four nadolol enantiomers in human plasma. The plasma samples were prepared using a convenient liquid-liquid extraction process and passed through HPLC. Nadolol was initially separated from the endogenous compounds or other impurities in human plasma on a Phenomenex silica column, and its enantiomers were resolved and determined on a Chirapak AD-H column. The developed HPLC method achieved an effective chiral separation and significantly eliminated endogenous compound interference. This optimal HPLC method was validated following FDA guidelines. The results showed good selectivity, linearity, accuracy (90.50 % - 105.27 %), and precision (RSDs < 9.52 %) for each enantiomer. This method was also successfully applied to determine nadolol enantiomers in the plasma samples of a healthy male volunteer (after orally administering 80 mg racemic nadolol), proving its suitability for nadolol stereoselective pharmacokinetic studies.

Simultaneous Determination of Hesperidin and Glycyrrhizin in Pyungwi-san by HPLC/DAD (HPLC-DAD를 이용한 평위산 중의 Hesperidin 및 Glycyrrhizin의 동시분석법 확립)

  • Lee, Mi-Kyeong;Choe, Ok-Gyeong;Park, Jin-Ho;Cho, Jung-Hee;Kim, Do-Hoon;Baek, Ju-Hyun;Kim, Hyo-Jin;Lee, Ki-Yong;Kim, Sang-Du;Kim, Young-Choong;Sung, Sang-Hyun
    • Korean Journal of Pharmacognosy
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    • v.39 no.3
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    • pp.199-202
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    • 2008
  • A high performance liquid chromatographic (HPLC) method for the simultaneous determination of hesperidin and glycyrrhizin was established for the quality control of traditional herbal medicinal preparation, Pyungwi-san (PWS). Separation and quantification were successfully achieved with a Waters XTerra RP18 column ($5{\mu}m$, 4.6 mm I.D. ${\times}$ 150 mm) by gradient elution of a mixture of acetonitrile and water containing 0.03% phosphoric acid (pH 2.03) at a flow rate of 1.0 ml/min. The diode-array UV/vis detector (DAD) was used for the detection and the wavelength for quantification was set at 230 nm. The presence of hesperidin and glycyrrhizin in this extract was ascertained by retention time, spiking with each authentic standard and UV spectrum. All four compounds showed good linearity $(r^2>0.995)$ in a relatively wide concentration ranges. The R.S.D. for intra-day and inter-day precision was less than 7.0% and the limits of detection (LOD) were less than 60 ng. The mean recovery of each compound was 99.0-105.6% with R.S.D. values less than 4.0%. This method was successfully applied to the determination of contents of hesperidin and glycyrrhizin in three commercial products of PWS. These results suggest that the developed HPLC method is simple, effective and could be readily utilized as a quality control method for commercial PWS products.