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Amino acid analysis by low pressure ion chromatography with conductivity detection / Hong Dai in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 5 (09-10/2004)
[article]
Titre : Amino acid analysis by low pressure ion chromatography with conductivity detection Type de document : texte imprimé Auteurs : Hong Dai, Auteur ; Zhang Xinshen, Auteur ; Zhaoli Wang, Auteur ; Bing Li, Auteur Année de publication : 2004 Article en page(s) : p. 197-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides aminés Les acides aminés (ou aminoacides) sont une classe de composés chimiques possédant deux groupes fonctionnels : à la fois un groupe carboxyle –COOH et un groupe amine –NH2. Parmi ceux-ci, les acides α-aminés se définissent par le fait que leur groupe amine est lié à l'atome de carbone adjacent au groupe acide carboxylique (le carbone α), ce qui leur confère la structure générique H2N–CHR–COOH, où R représente la chaîne latérale, qui identifie l'acide α-aminé.
Les acides α-aminés jouent un rôle fondamental en biochimie comme constituants élémentaires des protéines : ils polymérisent en formant des liaisons peptidiques qui aboutissent à de longues chaînes macromoléculaires appelées peptides.
Chimie analytique
ChromatographieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Automated amino acid analysis by low pressure ion chromatography separation and conductivity detection has been investigated. The method is characterized by separating amino acids under the low pressure of 1.97 - 2.94 x 10-5 Pa (30 - 40 psi) and detecting them by sensitive conductivity without pre-column or post-column derivatisation. The chromatography parameters were investigated, i.e. the capacity of the resin, the size of the resin, the length of separation column, elution solution and flow rate. The results show that 10 amino acids, Asp,
Hyp, Ser, Glu, Pro, Gly, Ala, Val, Met and Leu have been separated and detected successfully using a 5mm x 100mm long column filled with 25μm - 30μm size and 0.02mmol/g capacity cationic exchange resin. The elution solution is 0.8mmol/L nitric acid solution and the flow rate 0.6ml/min. The method is linear in the concentration range of 10-3 - 10-4 mol/L and 10-4 - 10-5 mol/L. The variation coefficient is 1%-5% and the detection limit which can be achieved is 1.0 x 10-5 mol/L.Note de contenu : - EXPERIMENTAL PROCEDURE : Apparatus - Reagents - Preparation of amino acid solution - Mobile phase
- RESULTS : Choice of separation column - Choice of the elution system - Study on the retention time of various kinds of amino acids - Separation experiment - Determination of accuracy - Linear range measurement and linear regression calculation - Determination of detection limits
- Table 1 : Optimum chromatography parameters of amino acid analysis
- Table 2 : Retention times of amino acids
- Table 3 : Result of the accuracy experiment of amino acids analysis by LPIEC and conductivity detection
- Table 4 : Result of linearity experiment of 10-3 - 10-4mol/L amino acids
- Table 5 : Result of linearity experiment of 10-4 - 10-5 mol/L amino acids
- Table 6 : Detection limitsEn ligne : https://drive.google.com/file/d/1YlHj4KHHmjgADuh5nAo71UU0NUWzG8ul/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39624
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 5 (09-10/2004) . - p. 197-201[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Analysis of hydroxyproline in collagen of pigskin tissue by low pressure ion chromatography separation and conductivity detection / Hong Dai in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 4 (07-08/2005)
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Titre : Analysis of hydroxyproline in collagen of pigskin tissue by low pressure ion chromatography separation and conductivity detection Type de document : texte imprimé Auteurs : Hong Dai, Auteur ; Zongcai Zhang, Auteur ; Subo Fan, Auteur ; Zhang Xinshen, Auteur Année de publication : 2005 Article en page(s) : p. 145-148 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides aminés Les acides aminés (ou aminoacides) sont une classe de composés chimiques possédant deux groupes fonctionnels : à la fois un groupe carboxyle –COOH et un groupe amine –NH2. Parmi ceux-ci, les acides α-aminés se définissent par le fait que leur groupe amine est lié à l'atome de carbone adjacent au groupe acide carboxylique (le carbone α), ce qui leur confère la structure générique H2N–CHR–COOH, où R représente la chaîne latérale, qui identifie l'acide α-aminé.
Les acides α-aminés jouent un rôle fondamental en biochimie comme constituants élémentaires des protéines : ils polymérisent en formant des liaisons peptidiques qui aboutissent à de longues chaînes macromoléculaires appelées peptides.
Chlorhydrique, Acide
Chromatographie
Collagène -- Analyse
Cuirs et peaux -- Analyse
Cuirs et peaux de porcs
Hydrolyse
Hydroxyproline
Séparation (technologie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A simplified method has been developed to determine the hydroxyproline concentration in pigskin collagen. The sample was prepared by hydrolyzing pigskin tissue collagen for 24 hours overnight at 110°C in 6M/Lhydrochloride acid followed by determination by low pressure ion chromatography separation and conductivity detection without derivatization.
Hydroxyproline was separated and detected successfully using a 5mm x 100mm long column filled with 25μm-30μm size and 0.02 mmol/g capacity cationic exchange resin. The elution solution was 0.8mmol/L nitric acid solution and the flow rate was 0.6ml/min. The concentration of the hydroxyproline sample was calculated by the five points work curve of standard stock solution. The result shows that the concentration of hyp in the sample was 3.16 ± 0.28 mmol/L. The RSD of the method was 4.63-8.97%. The recovery percentage of hyp added to the sample was 92.5-105.5%.Note de contenu : - EXPERIMENTAL METHODS : Reagents and chemicals - Apparatus - Optimum chromatography parameters
- RESULTS AND DISCUSSION : Determination of amount of hydrochloric acid needed for amino acid hydrolysis - Sample preparation - Standard curve preparation - Determination of hydroxyproline in sample - Recovery test - Determination of accuracy
- Table 1 : Optimum chromatography parameters of amino acid analysis
- Table 2 : Relationship between concentration of hydroxyproline and peak height
- Table 3 : Concentration of hydroxyproline in samples
- Table 4 : Recovery percentage of the determination for Hyp
- Table 5 : Result of accuracy experimentEn ligne : https://drive.google.com/file/d/14NZOFmgg0hcKd7hJDWqB0iiZqROk8HAy/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39245
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 4 (07-08/2005) . - p. 145-148[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Anionic surfactants : determination by flow injection spectrophotometry. Measurement of trace amounts in tannery effluent without liquid-liquid extraction / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 5 (09-10/2009)
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Titre : Anionic surfactants : determination by flow injection spectrophotometry. Measurement of trace amounts in tannery effluent without liquid-liquid extraction Type de document : texte imprimé Auteurs : Yu Lingyun, Auteur ; Zhang Xinshen, Auteur ; Yang Yujie, Auteur ; Yu Lan, Auteur ; Sun Jing, Auteur ; Liu Hongyan, Auteur ; Tong Ling, Auteur ; Sun Dongmei, Auteur Année de publication : 2009 Article en page(s) : p. 183-185 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to control the pollution by anionic surfactants in water, and detect anionic surfactants on-line, a simple, accurate and sensitive flow injection spectrophotometric method for simultaneous determination of anionic surfactant in water is proposed in this paper. The method is based on the ion associate formed between sodium dodecylbenzenesulfonate and ethyl violet. Lthe absorbance of the complex is measured using an optical detector at 587nm. Chemical factors and FIA variables affecting the system are also discussed. Under the optimal conditions, the linear range of this method was 10.00-3000.00µ 1-1 ; the detection limit was 0.25µg 1-1 ; the relative standard deviation was 0.814%. This method is suitable for automatic and continuous analysis, and successfully applied to simultaneously determine the content of anionic surfactant in tannery effluent. En ligne : https://drive.google.com/file/d/1y4ake9Jl4MEGkVFTIY-2waewlzP6J2-9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6277
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 5 (09-10/2009) . - p. 183-185[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011654 - Périodique Bibliothèque principale Documentaires Disponible Biodiesel from waste pigskin oil- a two-step process / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 4 (07-08/2009)
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Titre : Biodiesel from waste pigskin oil- a two-step process Type de document : texte imprimé Auteurs : Yu Lingyun, Auteur ; Zhao Tiantian, Auteur ; Zhang Xinshen, Auteur ; Zhan Wenxue, Auteur Année de publication : 2009 Article en page(s) : p. 149-151 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper provides a general description of a new continuous biodesel production process, where the transesterification reaction is promoted by two catalysts. The process has been applied on a laboratory scale. The acid value of waste pig oil was greater than 100mgKOH/g oil, but the acid value of biodesel was less than 0.80mgKOH/g oil, and the ester conversion rate was more than 80 percent. The density, residual carbon contents, and acid value of biodesel were met the performance standards of 0# diesel - standard road vehicle oil. En ligne : https://drive.google.com/file/d/1fmvww-E9pZoa3GcyVv0oEz7blWEOWyD-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6105
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 4 (07-08/2009) . - p. 149-151[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011502 - Périodique Bibliothèque principale Documentaires Disponible Characterisation of peroxide value in natural oils and fats by Fourier Transform Spectroscopy / Zhou Hualong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 4 (07-08/2002)
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Titre : Characterisation of peroxide value in natural oils and fats by Fourier Transform Spectroscopy Type de document : texte imprimé Auteurs : Zhou Hualong, Auteur ; Minghua Liu, Auteur ; Junshu Zhang, Auteur ; Zhang Xinshen, Auteur Année de publication : 2002 Article en page(s) : p. 153-156 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Fourier, Spectroscopie infrarouge à transformée de
Huile de colza
Huiles et graisses -- Analyse
Huiles et graisses -- Oxydation
Huiles et graisses de poissons
Indice de peroxydeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A primary Fourier transform infrared (FTIR) spectroscopic method was applied here to characterise the peroxide value (PV) in natural oils and fats such as refined rapeseed oil, fish and also rape oil with partial ester exchange so that the changes after the catalysed oxidation of the above three kinds of oils and fats could be studied. It can be concluded that the changes in the oxidised oils and fats can be characterised by FTIR spectroscopy directly and quantitatively. R - OOH which can react with sulphites is the main oxidation product. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Instruments and apparatus - Preparation of samples
- RESULTS AND DISCUSSION : Synthesis mechanism - Spectrum analysis and discussion
- Table 1 : PV of pure rapeseed oil
- Table 2 : PV of rapeseed oil with partial ester exchangeEn ligne : https://drive.google.com/file/d/1bVlxzKL1zRnlKy5AZzxZc3viFQiAV5-O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39905
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 4 (07-08/2002) . - p. 153-156[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Determination of Al2O3 in tanning liquor by flow-injection spectrophotometry / Yuan Dong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 6 (11-12/2007)
PermalinkDetermination of chloride and sulphate ions in leather pickling liquor by low-pressure ion chromatography / Bo Li in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 1 (01-02/2004)
PermalinkDetermination of chromium(III) and chromium(VI) in water by low Pressure ion chromatography coupled with inductively coupled plasma-mass spectrometry / Jin Haochen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 4 (07-08/2016)
PermalinkDetermination of dimethyl fumarate in leather : purge-assisted headspace solid-phase microextraction coupled with GC-MS / Li Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 4 (07-08/2012)
PermalinkDetermination of PO4-P in tannery effluent by reverse reference flow injection / Xie Yonghong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 4 (07-08/2007)
PermalinkDetermination of surfactants in leather wastewater by flow injection spectrophotometry / Yuan Dong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)
PermalinkDetermination of the aluminium content of basic aluminium chloride by FIA / Guohe Chen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 4 (07-08/2004)
PermalinkDetermination of trace chromium (VI) ion chrome tanning agents by flow injection / Zhang Xinshen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 6 (11-12/2000)
PermalinkDetermination of volatile phenol in tannery effluent / Xie Yonghong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 1 (01-02/2008)
PermalinkDirect spectrophotometric determination of formaldehyde in leather wastewater by flow injection analysis with chromotropic acid / Zou Yuquan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 4 (07-08/2007)
PermalinkA fast method for determination of sulfate in tannery waste waster / Xie Yonghong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 6 (11-12/2006)
PermalinkA fast method to determine trace chromium(III) ion in chrome tanning and chrome tanning waste / Zhaoli Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 3 (05-06/2004)
PermalinkFlow injection spectrophotometric determination of chromium(VI) extracted from dyed leather with on-line decolouring / Li Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 4 (07-08/2012)
PermalinkFlow injection spectrophotometric determination of proteins in tannery effluents / Yu Lan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)
PermalinkKinetic spectrophotometric flow injection determination of hyamine cationic surfactants in tannery effluent / Tu Jie in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 3 (05-06/2009)
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