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Analysis of some metals in wine by means of capillary electrophoresis. Application to the differentiation of Ribeira Sacra Spanish red wines 毛细管电泳法分析葡萄酒中部分金属。应用于西班牙圣里贝拉红葡萄酒的鉴别
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000129
M. Núñez, R. Peña, C. Herrero, S. García-Martín
{"title":"Analysis of some metals in wine by means of capillary electrophoresis. Application to the differentiation of Ribeira Sacra Spanish red wines","authors":"M. Núñez, R. Peña, C. Herrero, S. García-Martín","doi":"10.1051/ANALUSIS:2000129","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000129","url":null,"abstract":"The content of some metals (Na, K, Ca, Mg, Mn and Li) in a variety of red wines produced in different geographi- cal zones of Galicia was determined in a single analysis by capillary electrophoresis. Data were processed using multivariate supervised and non-supervised chemometric techniques involving cluster analysis, principal component analysis (PCA), linear dis - criminant analysis (LDA), K nearest neighbours (KNN) and soft independent modelling of class analogy (SIMCA). The results obtained have allowed for the categorisation of wine samples according to their origin; the wines with Ribeira Sacra Certified Brand of Origin (CBO) can be differentiated from the wines of two other CBO from Galicia: Ribeiro and Valdeorras. The latter two types of wine are made with the same or similar grape varieties; hence, due to their similar organoleptic properties they a re possible substitutes for the falsification of Ribeira Sacra wines.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"64 1","pages":"432-437"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79665494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 37
Non-invasive confirmation of the identity of tablets by near-infrared spectroscopy 近红外光谱法无创鉴别片剂
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000124
M. Ulmschneider, E. Penigault
{"title":"Non-invasive confirmation of the identity of tablets by near-infrared spectroscopy","authors":"M. Ulmschneider, E. Penigault","doi":"10.1051/ANALUSIS:2000124","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000124","url":null,"abstract":"Calibration of non-invasive near-infrared (NIR) analysis for measurements in diffuse reflectance and transmittance was conducted to confirm the identity of different film-coated and uncoated tablets. NIR-spectra of both sides of the intact tablet s were recorded in diffuse reflectance. The second derivation of the spectra was computed and spectral matching was calibrated. A restricted wavelength range was proposed to recognize the tablets independently of the presentation over the NIR-light beam. For transmittance measurement, the tablets were arranged in groups according to their similarities. All calibrations were teste d against an independent set of sample spectra. The NIR-method proved to be fast and effective. Key-words. Fourier transform near-infrared spectroscopy - diffuse reflectance - transmittance - non-invasive tablets analysis - identity testing.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"123 1","pages":"336-346"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76767770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Simultaneous determination of nitrite, nitrate, sulphate and phenolic compounds, by sequential injection analysis, in wastewaters 污水中亚硝酸盐、硝酸盐、硫酸盐和酚类化合物的顺序注射分析同时测定
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000118
R. Lapa, J. Lima, Ivone V. O. S. Pinto
{"title":"Simultaneous determination of nitrite, nitrate, sulphate and phenolic compounds, by sequential injection analysis, in wastewaters","authors":"R. Lapa, J. Lima, Ivone V. O. S. Pinto","doi":"10.1051/ANALUSIS:2000118","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000118","url":null,"abstract":"A sequential injection analysis (SIA) system for the simultaneous determination of nitrite, nitrate, sulphate and phenolic compounds, in wastewaters has been developed. The nitrite determination is based on the Griess-Llosvay reaction. Nitrate is previously reduced to nitrite in a copperized cadmium column and analyzed as nitrite. The sulphate determination is based on the turbidimetric determination using barium chloride as reagent. The phenolic compounds determination is based on oxidative coupling with 4-aminoantipyrine (4-AAP) in alkaline solution. The resulting products of each reaction were spectrophotometrically measured at 540 nm. The proposed system is fully automatized and is able to monitor nitrite, nitrate, sulphate and phenolic compounds, simultaneously, in samples at a frequency of about 12 samples per hour with a relative standard deviation (RSD) better than 2.0 %, 0.7 %, 1.5 % and 2.2%, respectively. The calibration graph is linear between 0.05 and 25 mg.dm -3 for nitrite, 0.05 and 15 mg.dm -3 for nitrate, 5 and 200 mg.dm -3 for sulphate and, finally, between 0.5 and 25 mg.dm -3 for phenolic compounds.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"1 1","pages":"295-301"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75720258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Rapid on-line sampler-injector : a reliable tool for HT-HP sampling and on-line GC analysis 快速在线进样-进样器:高温高压采样和在线气相色谱分析的可靠工具
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000128
P. Guilbot, A. Valtz, Herve Legendre, D. Richon
{"title":"Rapid on-line sampler-injector : a reliable tool for HT-HP sampling and on-line GC analysis","authors":"P. Guilbot, A. Valtz, Herve Legendre, D. Richon","doi":"10.1051/ANALUSIS:2000128","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000128","url":null,"abstract":"Withdrawing of representative and reliable microsamples down to 1/100th mg is far from trivial, especially for extreme conditions such as high temperature and high pressure conditions or very corrosive media. The new Rapid On-Line Sampler- Injector presented herein was designed and set-up to largely extend sampling capabilities in hazardous media. It is largely use d in our laboratory to measure vapour-liquid equilibria. It has a lot of applications, both in production (process control in pet ro- leum, chemical, nuclear plants, etc.) and academic and industrial researches and development (laboratory instruments, pilot plants…).","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"1 1","pages":"426-431"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91093143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 180
Gas and liquid chromatography-mass spectrometry of aldehydic products from lipid peroxidation 脂质过氧化醛产物的气相和液相色谱-质谱分析
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000280285
M. Enoiu, M. Wellman, P. Leroy, J. Ziegler, N. Mitrea, G. Siest
{"title":"Gas and liquid chromatography-mass spectrometry of aldehydic products from lipid peroxidation","authors":"M. Enoiu, M. Wellman, P. Leroy, J. Ziegler, N. Mitrea, G. Siest","doi":"10.1051/ANALUSIS:2000280285","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000280285","url":null,"abstract":"The present report describes the identification of aldehydic products of lipid peroxidation by two chromatographic methods coupled to mass spectrometry, GC/EI-MS and LC/ESI-MS. The easy detection of molecular ions in LC/ESI-MS and fragmentation pattern in GC/EI-MS illustrate the complementarity of these two techniques. Several carbonyl compounds, other than the usual reported breakdown products of lipid peroxidation, e.g. malondialdehyde and 4-hydroxynonenal, were identified as 2,4-dinitrophenylnonenal, derivatives in the Fe 2+ /ascorbate-catalyzed peroxidation of linoleic and linolenic acids.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"33 1","pages":"285-290"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87150081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Investigation of the in vitro metabolism of 17b-estradiol by LC-MS/MS using ESI and APC hplc -MS/MS ESI和APC法研究17b-雌二醇体外代谢
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000280273
E. Rathahao, A. Hillenweck, A. Paris, L. Debrauwer
{"title":"Investigation of the in vitro metabolism of 17b-estradiol by LC-MS/MS using ESI and APC","authors":"E. Rathahao, A. Hillenweck, A. Paris, L. Debrauwer","doi":"10.1051/ANALUSIS:2000280273","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000280273","url":null,"abstract":"Liquid chromatography coupled to tandem mass spectrometry with electrospray ionisation (ESI) and atmospheric pressure chemical ionisation (APCI) were used for the investigation of the in vitro metabolism of 17β-estradiol on rat isolated hepatocytes. The catechol estrogens corresponding to 17β-estradiol and estrone were identified by ESI, together with their glutathione and glucoronide conjugates, whereas more apolar compounds such as methoxylated catechol estrogens were characterised using APCI.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"2 1","pages":"273-279"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80914255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Metallothioneins and diseases with special reference to cadmium poisoning 金属硫蛋白与镉中毒的疾病
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000280396
G. Nordberg, T. Jin, P. Leffler, Mona Svensson, T. Zhou, M. Nordberg
{"title":"Metallothioneins and diseases with special reference to cadmium poisoning","authors":"G. Nordberg, T. Jin, P. Leffler, Mona Svensson, T. Zhou, M. Nordberg","doi":"10.1051/ANALUSIS:2000280396","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000280396","url":null,"abstract":"Metallothionein (MT) a low molecular weight metal binding protein, is involved in several human diseases. Brain tissue from Alzheimers patients contains lower concentrations of Growth Inhibitory Factor or MT-3. Induction of MT by bismuth increases resistance to renal toxicity of cis-platinum and may be advantageous in can- cer therapy. Cadmium exposure induces MT-syn- thesis in liver, binding Cd and protecting against acute toxicity. Cd-MT is released from liver into plasma, filtered in renal glomerulus and absor- bed in tubules. Lysosomal breakdown of MT releases toxic Cd. This mechanism explains renal tubular damage after long-term exposure to Cd. Impaired tubular regulation of calcium and vita- min D metabolism contributes to the develop- ment of the adverse effects on the skeleton. Quantitative, specific polymerase chain reaction (PCR) studies showed increased expression of mRNA of MT in testicles after Cd exposure, sup- porting the notion that MT increases cellular resistance to metals and protects from Cd toxi- city. This idea was advanced by one of the pre- sent authors thirty years ago.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"09 1","pages":"396-400"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86224371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Unusual behavior of gem-diamino peptides in fast atom bombardment and electrospray ionization mass spectrometry 宝石二氨基肽在快速原子轰击和电喷雾电离质谱分析中的异常行为
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000280268
B. Vivet, F. Cavelier, C. Enjalbal, J. Martinez, P. Sanchez, J. Aubagnac
{"title":"Unusual behavior of gem-diamino peptides in fast atom bombardment and electrospray ionization mass spectrometry","authors":"B. Vivet, F. Cavelier, C. Enjalbal, J. Martinez, P. Sanchez, J. Aubagnac","doi":"10.1051/ANALUSIS:2000280268","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000280268","url":null,"abstract":"Gem-diamino peptides were studied by fast atom bombardment (FAB) and electrospray ionization (ESI) mass spectrometry to evidence specific fragmentations involving the labile modified bonds. Base peaks recorded in the positive mode were attributed to fragment ions even with soft atmospheric pressure ionization. The criterion that one ion corresponds to one molecule in ESI mass spectra commonly encountered in high throughput analysis of combinatorial libraries must be considered with caution when fragile structures are analyzed.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"16 1","pages":"268-272"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82649756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
■ ESI-MS for the measurement of bovine and porcine somatotropins ESI-MS用于测定牛和猪的生长激素
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000280280
N. Rochut, B. Bizec, F. Monteau, F. André
{"title":"■ ESI-MS for the measurement of bovine and porcine somatotropins","authors":"N. Rochut, B. Bizec, F. Monteau, F. André","doi":"10.1051/ANALUSIS:2000280280","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000280280","url":null,"abstract":"Somatotropins are proteins naturally produced by the pituitary gland in cattle. Recombinant somatotropins, which differ from their native form by several amino acids, have been synthesised in order to increase milk production in dairy cows. As their use is forbidden in Europe, control has to be performed. Until now, radioimmunoassay methods were generally used for quantification, but none is able to distinguish endogenous from recombinant somatotropins. Herein, a sensitive method based on liquid chromatography‐mass spectrometry (LC-MS) and electrospray ionisation (ESI) is presented in view to identify and quantify somatotropins in milk and plasma. Accuracy of the technique should allow the molecular mass differentiation between pituitary and recombinant somatotropins. The detection limit was measured at the nanogram level. As a second approach an enzymatic digestion was performed on recombinant somatotropin. A N-terminal digest proved to be specific and would allow to differentiate recombinant and endogenous proteins. Separation and detection of peptide fragments by ESI-LC-MS appear to be promising.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"28 1","pages":"280-284"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73658632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Additional considerations for trace element analysis of environmental matrices using inductively coupled plasma atomic emission spectrometry with ultrasonic nebulization 使用超声雾化电感耦合等离子体原子发射光谱法分析环境基质中微量元素的附加考虑
Analusis Pub Date : 2000-06-01 DOI: 10.1051/ANALUSIS:2000127
M. Hoenig, H. Dočekalová, H. Baeten
{"title":"Additional considerations for trace element analysis of environmental matrices using inductively coupled plasma atomic emission spectrometry with ultrasonic nebulization","authors":"M. Hoenig, H. Dočekalová, H. Baeten","doi":"10.1051/ANALUSIS:2000127","DOIUrl":"https://doi.org/10.1051/ANALUSIS:2000127","url":null,"abstract":"This work compares efficiencies of pneumatic and ultrasonic nebulizers and discusses drawbacks observed in trace ele- ment analyses of environmental matrices using ICP-AES with ultrasonic nebulization. The interference observed is mainly due to variable calcium content in samples; in most cases the excessive plasma loading by Ca is responsible for signal suppression of analyte elements. Such matrix effect may be managed to a certain extent using a classical internal standardisation that is d is- cussed in details. Under well defined conditions, the ICP-AES-USN analysis of most trace elements leads to accurate results for matrices usually studied. However, due to chemical reactions occurring in the condensation stage of the ultrasonic nebulizer an d subsequent analyte losses to the waste, the ICP-AES-USN analysis of copper and particularly of boron has to be avoided because it leads unavoidably to erroneous results. This drawback cannot be resolved by usual means of correction but may be overcome by using conventional pneumatic nebulizers.","PeriodicalId":8221,"journal":{"name":"Analusis","volume":"42 1","pages":"419-425"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78692739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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