• Title, Summary, Keyword: HPLC

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Comparison of Colorimetry and HPLC Method for Quantitative Analysis of Chitooligosaccharide (키토올리고당의 측정법으로 비색법과 HPLC법의 비교)

  • Kang, Kil-Jin;Cho, Jung-Il
    • Korean Journal of Food Science and Technology
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    • v.32 no.4
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    • pp.788-791
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    • 2000
  • The quantitative analysis of chitooligosaccharide was compared to using colorimetry and HPLC method. HPLC method required less than 10mins per sample in analytical time of glucosamine and its the recovery rate was 98.4% (10 mg/ml, w/v). Also there was no the effects of interfering substances(false positive response) by HPLC method. The content of chitooligosaccharide in processed chitooligosaccharide products obtained using HPLC showed lower levels compared to colorimetry. Thus, HPLC method was more sensitive, effective and precise than the colorimetry currently used to determine the glucosamine of chitooligosaccharide.

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Analytical Characteristics of GC/MS and HPLC according to the Concentration Distribution of PAHs (PAHs 농도 분포에 따른 GC/MS와 HPLC의 분석특성에 관한 연구)

  • Hong, Jwa-Ryung;Choi, Kwang-Min
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.25 no.3
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    • pp.312-321
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    • 2015
  • Objectives: The purpose of this study was to determine the best method to analyze PAHs at extremely low concentrations. To this end, 16 PAHswere analyzed simultaneously by GC/MS, HPLC/FLD and HPLC/UVD, and the analytical characteristics of HPLC and GC/MS were compared. Methods: This study was conducted by GC/MS and HPLC/FLD/UVD, and evaluated linearity, precision and detection limit. Standard solutions were prepared for 21 samples in the range of $0.00001{\sim}1.0{\mu}g/mL$ and the samples were divided into four groups. All samples were made in three sets and analysis was replicated seven times. Results: Sixteen PAHs could be simultaneously separated by HPLC and GC/MS, and the adequate equipment was HPLC/FLD. The retention times by HPLC were shorter than GC/MS, and HPLC had better separation for most PAHs than GC/MS. The peaks of naphthalene and naphthalene-D8 partially overlapped for GC/MS. HPLC/FLD had a 20-2000 times lower limit of detection than GC/MS and UVD. However FLD was not adequate for analyzing acenaphthylene because it has too low a fluorescence quantum yield to be detected. The precision of HPLC/FLD/UVD and GC/MS showed less than 20% at $0.001{\mu}g/mL$ PAHs and when the concentration was higher, the coefficient of variation was decreased. HPLC/FLD was better for the overall detection of limits. Conclusions: The results indicate that the HPLC/FLD method has good linear range, precision and a detection of limits from $0.00001{\sim}0.0001{\mu}g/mL$ for all 16 PAHs. This study contributes to providing useful data for analysis technology and can be applied to occupational exposure measurement for PAHs in workplaces.

Simultaneous analysis of sugars by HPLC (HPLC를 이용한 당류의 동시분석법)

  • 허부홍;서형석;김성문;김영진;조종후
    • Korean Journal of Veterinary Service
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    • v.23 no.2
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    • pp.137-142
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    • 2000
  • In order to develop a good separation and simultaneous analysis of different sugar in an artificial mixed sugar solution, we analyzed 10 sugar components in an artificial mixed sugar solution composed of fructose, glucose, mannitol, sucrose, maltose, lactose, xylose, xylitol erythritol, and trehalose with using HPLC-ELSD or HPLC-RI. Separation and quantification by HPLC-ELSD was superior to those by HPLC-RI and detection sensitivity by HPLC-ELSD was higher then that by HPLC-RI as micorgram($\mu\textrm{g}$) level. 1. The units of minimal detectable limits were showed $\mu\textrm{g}$/$m\ell$ and ng/$m\ell$ by the HPLC-RI and HPLC-ELSD, respectively. 2. The condition of ELSD was drift tube temperature $82^{\circ}C$, $N_2$ gas flow rate 2.10 SLPM, and colum oven temperature $30^{\circ}C$, respectively. Isolation and recovery rates of single sugar from the multiple sugar solution was higher at the condition (time: flow rate: D.W.:ACN MeOH, min : $m\ell$/min:v:v:v) of linear gradient elution of mobile phase as 0 : 1.00 : 15 : 85 : 0.1 : 1.00 : 6 : 90 : 4, 17 : 1.00 : 10 : 70 : 20, 28 : 1.00 : 15 : 85 : 0 an 35 : 1.00 : 15 : 85 : 0, in order.

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Development of Analytical Methods for Micro Levels of Naphthalene and TNT in Groundwater by HPLC-FLD and MSD (HPLC-FLD와 MSD를 이용한 지하수 중 나프탈렌 및 TNT의 미량 분석법 개발)

  • Park, Jong-Sung;Oh, Je-Ill;Jeong, Sang-Jo;Choi, Yoon-Dae;Her, Nam-Guk
    • Journal of Soil and Groundwater Environment
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    • v.14 no.6
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    • pp.35-44
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    • 2009
  • Naphthalene and TNT (2,4,6-trinitrotoluene) are defined by U.S. EPA as possible carcinogenic compounds known to have detrimental effects on the aquatic ecosystem and human body. There are, however, few researches on methods of analyzing micro-levels of naphthalene and TNT dissolved in groundwater. This study introduces and evaluates the newly developed analytical methods of measuring naphthalene and TNT in groundwater by using HPLC-FLD (Fluorescence detector) and MSD (Mass detector). The MDL, LOQ and salt effect of these methods, respectively, are compared with those of conventional methods which use HPLC-UV. For the analysis of naphthalene, HPLC-FLD was set in the maxima wavelength (Ex: 270 nM, Em: 330 nM) obtained from 3D-Fluorescence to be compared with HPLC-UV in 266 nM wavelength. The MDL ($0.3\;{\mu}g/L$) and LOQ ($2.0\;{\mu}g/L$) of naphthalene by using HPLC-FLD were approximately 80 times lower than those analyzed by HPLC-UV (MDL: $23.3\;{\mu}g/L$, LOQ: $163.1\;{\mu}g/L$). HPLC-MSD were used in comparison with HPLC-UV in 230 and 254 nM wavelength for the analysis of TNT. The MDL ($0.13\;{\mu}g/L$) and LOQ ($0.88\;{\mu}g/L$) of TNT analyzed by using HPLC-MSD were approximately 130 times lower than those obtained by using HPLC-UV in 230 nM (MDL: $16.8\;{\mu}g/L$, LOQ: $117.5\;{\mu}g/L$). The chromatogram of TNT analyzed by using HPLC-UV in 230 nM displayed elevated baseline as the concentration of ${NO_3}^-$ increases beyond 21 mg/L, while the analysis using HPLC-MSD did not demonstrate any change in baseline in presence of ${NO_3}^-$ of 63.7 mg/L which is 3.5 times higher than average concentration in groundwater. In conclusion, HPLC-FLD and HPLC-MSD may be used as suitable methods for the analysis of naphthalene and TNT in groundwater and drinking water. These methods can be applied to the monitoring of naphthalene and TNT concentration in groundwater or drinking water.

Comparison of strip analysis and HPLC analysis for the quantitative analysis of cyanobacterial toxin (남조류 독소 정량을 위한 스트립분석법과 HPLC 분석법의 비교)

  • Pyo, Dongjin;Yim, Miyeon
    • Analytical Science and Technology
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    • v.28 no.3
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    • pp.168-174
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    • 2015
  • Cyanobacterial toxins, such as microcystins, which exist in Korean lakes, are strongly toxic in fish, cattle, and humans. This study performs a quantitative analysis of cyanobacterial toxins in water by comparing the strip method and the HPLC method. Because the detection ranges of the strip method and the HPLC method are different, the water samples were diluted. The comparison of the strip method and the HPLC method was made using seven samples that contained different concentrations of microcystin. The quantitative results produced by the strip analysis were significantly aligned with the results of the HPLC analysis. The results of correlation analysis were r = 0.99998 and p = 0.00001.

Determination of Retinols in Pharmaceutical Preparations by HPLC (HPLC를 이용한 제제중의 레티놀 유도체 정량)

  • 안문규;문현숙;허문회;김대병;박승희
    • YAKHAK HOEJI
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    • v.45 no.4
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    • pp.352-356
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    • 2001
  • A simple and rapid determination of total retinol from various pharmaceuticals containing retinol derivatives was described. Retinol derivatives were hydrolyzed with alcoholic KOH to alcoholic retinol, which was determined by HPLC. Pretreatments and HPLC conditions depend on the kind of retinols and preparation forms. The total amount of alcoholic retinol could be determined with this method from many pharmaceutical preparation of retinol derivatives. Treating time of KOH, acidic reagents and HPLC conditions were investigated.

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Validation Process of HPLC Assay Methods of Drugs in Biological Samples (생체시료내 약물의 HPLC 분석법에 대한 유효성 검토방법)

  • Chi, Sang-Cheol;Jun, H.-Won
    • Journal of Pharmaceutical Investigation
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    • v.21 no.3
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    • pp.179-188
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    • 1991
  • An HPLC assay method of a drug to be applied to the pharmacokinetic studies of the drug should be completely validated. The validation process for an HPLC assay method in a biological sample was discussed using the data obtained from the development of HPLC method for the simultaneous quantitation of verapamil and norverapamil in human serum. The validation criteria included were specificity, linearity, accuracy, precision, sensitivity, recovery, drug stability, and ruggedness of an assay method.

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Preparation of Standard Phosphatidylcholine Hydroperoxide for Chemiluminescence-HPLC Assay (화학발광고속액체크로마토그래피법에 대한 표준물질인 포스파티딜콜린 하이드로퍼옥사이드의 조제)

  • Song, Jin Hyang;Choi, Hong Yeob;Park, Dong Ki
    • Analytical Science and Technology
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    • v.11 no.6
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    • pp.474-477
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    • 1998
  • A simple and rapid method for preparation of standard phosphatidylcholine hydroperoxide (PCOOH) in chemiluminescence-HPLC assay (CL-HPLC) was developed using the rose bengal dependent spectrofluorometric oxidation. The concentration of obtained PCOOH was determined by FOX (ferrous oxidation-xylenol orange) assay and then subjected to a CL-HPLC system.

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HPLC Method Validation for Quantitative Analysis of Scopoletin from Hot-Water Extract Powder of Artemisia annua Linné (기능성 원료 인정을 위한 제출자료 작성 가이드[민원인 안내서]에 따른 개똥숙 열수추출분말의 Scopoletin 분석을 위한 HPLC 분석법 밸리데이션)

  • Kim, Seon-Hee;Yoon, Kee Dong
    • Korean Journal of Pharmacognosy
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    • v.51 no.1
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    • pp.78-85
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    • 2020
  • In this study, we shortly introduced the HPLC method validation guideline for the analysis of functional food which was released from the Ministry of Food and Drug Safety of Korea in Dec 2018. The HPLC method validation was performed through the aforementioned HPLC method validation guideline in order to quantitate scopoletin content from the hot-water extract powder of Artemisia annua Linné. The HPLC method was validated by evaluating specificity, accuracy, precision, limit of quantitation and linearity. All parameters were in the suitable ranges which are designated in the guideline, which indicated the current HPLC method is reliable to quantitate the scopoletin content from the hot-water extract of A. annua.

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Identification of Proteins in Egg White Using Ion Exchange Cartridge and RP-HPLC (이온교환 카트리지와 RP-HPLC를 이용한 난백 단백질의 확인)

  • Kim, Hyun Moon;Kim, Ah Reum;Lee, Chang Soo;Kim, In Ho
    • Korean Chemical Engineering Research
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    • v.50 no.4
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    • pp.713-717
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    • 2012
  • Approximately forty proteins in egg white have been widely studied for their functional properties. To develop a procedure of separation for pure and non-altered proteins from egg white, purification study was conducted to isolate lysozyme, ovotransferrin, and ovalbumin. Ion exchange cartridge can selectively separate proteins from egg white, and reversed-phase HPLC (RP-HPLC) could identify separated proteins. Proteins in egg white were purified by HI trap ion exchange cartridge SP and Q with buffers pH 8.0 and 5.2. C18 column (Phenomenex, USA) was used for RP-HPLC analysis and isocratic mobile phase was used with acetonitrile (ACN)/distilled water (DW)/trifluoroacetic acid (TFA) in the ratio of 50/50/0.1. Comparing the retention times of standards in RP-HPLC experiments showed that ovotransferrin, ovalbumin, and lysozyme in egg white were eluted successively in the RP-HPLC column after the pretreatment in SP and Q ion exchange cartridges.