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[PDF] Top 20 Comparison of quantification methods in gas chromatography: an experiment for chemistry courses.

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Comparison of quantification methods in gas chromatography: an experiment for chemistry courses.

Comparison of quantification methods in gas chromatography: an experiment for chemistry courses.

... COMPARISON OF QUANTIFICATION METHODS IN GAS CHROMATOGRAPHY: AN EXPERIMENT FOR CHEMISTRY ...describes an experiment designed to teach ... See full document

4

Didactic experiment on gas chromatography: an environmental and analytical approach.

Didactic experiment on gas chromatography: an environmental and analytical approach.

... DIDACTIC EXPERIMENT ON GAS CHROMATOGRAPHY: AN ENVIRONMENTAL AND ANALYTICAL ...describes an experiment to teach the principles of gas chromatography exploring ... See full document

4

Comparison of High Performance Liquid Chromatography with Fluorescence Detector and with Tandem Mass Spectrometry Methods for Detection and Quantification of Ochratoxin A in Green and Roasted Coffee Beans

Comparison of High Performance Liquid Chromatography with Fluorescence Detector and with Tandem Mass Spectrometry Methods for Detection and Quantification of Ochratoxin A in Green and Roasted Coffee Beans

... rate of 0.3 mL min -1 at 25°C in an isocratic ...conditioning of the column to the initial conditions was 10 ...with an electrospray (ESI) ionization operating in the positive ... See full document

10

Synthesis and esterification reactions of isobutylene: an undergratuate organic chemistry experiment.

Synthesis and esterification reactions of isobutylene: an undergratuate organic chemistry experiment.

... a in- corporar a noção de que substâncias orgânicas gasosas não são mui- to utilizadas em síntese orgânica, a não ser como combustíveis no bico de ...orgânica in- dustrial, onde vários gases orgânicos são ... See full document

3

Assessment Of NPK In Human Male And Female Urine For Its Fertilising Potential In Agriculture

Assessment Of NPK In Human Male And Female Urine For Its Fertilising Potential In Agriculture

... irrespective of the type of treatment ...likelihood of cross-contamination with the use of urine separating (Ecosan) toilets ...part of the total nutrients in normal sewage; 80% ... See full document

9

Development and validation of a portable gas phase standard generation and calibration system for volatile organic compounds

Development and validation of a portable gas phase standard generation and calibration system for volatile organic compounds

... gas-chromatography (Rappengluck et al., 2006) or PTR-MS (de Gouw and Warneke, 2007) rely on the accuracy of the calibration methods used. For many VOCs, but es- pecially for “sticky” compounds ... See full document

25

In vivo quantification methods: PET

In vivo quantification methods: PET

... use of the same imaging and quantification techniques in small animals and clinical studies presents the opportunity for direct translational research in drug discovery and development, ... See full document

19

Studies of corrosion behaviour in acid environment of binary Mg-Li alloys for plastic forming

Studies of corrosion behaviour in acid environment of binary Mg-Li alloys for plastic forming

... principle of the method consisted in subjecting the samples of M g-Li alloys to the effect of a solution prepared in a ...conducted in 5% aqueous solution of ...duration ... See full document

4

Application of time-series analysis for prediction of molding sand properties in production cycle

Application of time-series analysis for prediction of molding sand properties in production cycle

... The basic model used for residual data was simple linear mul- tivariate regression. However, for the 10 cases with largest pre- diction errors, also a regression tree model, based on the C&RT algorithm [8], was ... See full document

5

Quantification of levoglucosan and its isomers by High Performance Liquid Chromatography – Electrospray Ionization tandem Mass Spectrometry and its applications to atmospheric and soil samples

Quantification of levoglucosan and its isomers by High Performance Liquid Chromatography – Electrospray Ionization tandem Mass Spectrometry and its applications to atmospheric and soil samples

... analysis of aqueous samples. Recently, other analytical methods without derivatization step were developed for monosaccharide anhydrides quantification us- ing High Performance Liquid ... See full document

22

3 ∗ 1 Laboratório de Produtos Naturais, PN3, Far-Manguinhos, FIOCRUZ Rua Sizenando Nabuco, 100, 21041-250 Rio de Janeiro, RJ, Brasil

3 ∗ 1 Laboratório de Produtos Naturais, PN3, Far-Manguinhos, FIOCRUZ Rua Sizenando Nabuco, 100, 21041-250 Rio de Janeiro, RJ, Brasil

... This analysis was carried out using a Hewlett- Packard 6890 gas chromatograph equipped with a fused silica capillary column (HP-5, 30m × 0.25mm, 0.25µm film thickness), helium as carrier gas with a flow ... See full document

6

Technologies for green revolution are precarious in public education institution

Technologies for green revolution are precarious in public education institution

... achieved in the domain of International Environmental Education Programme (PIEA), coordinated by the United Nations for Education, Scientific and Cultural Organization (UNESCO) and United Nations ... See full document

8

Model of knowledge representation about materials in the form of a relational database for CAPCAST system

Model of knowledge representation about materials in the form of a relational database for CAPCAST system

... rage of all available data on materials, not just of those specified attributes that are necessary for the currently implemented model of reasoning, as at later stages of the system execution, ... See full document

6

Extraction of pigments from seeds of Bixa orellana L.: an alternative for experimental courses in organic chemistry.

Extraction of pigments from seeds of Bixa orellana L.: an alternative for experimental courses in organic chemistry.

... EXTRACTION OF PIGMENTS FROM SEEDS OF Bixa orellana L.: AN ALTERNATIVE FOR EXPERIMENTAL COURSES IN ORGANIC ...NMR of bixin from Bixa orellana ...for an experimental Organic ... See full document

4

The Concept of Early Vascular Ageing – An Update in 2015

The Concept of Early Vascular Ageing – An Update in 2015

... markers of glucose metabolism and dyslipidaemia (elevated triglycerides, low HDL cholesterol levels) as well as waist circumference (a marker of active abdominal fat tissue with inlammatory action) are ... See full document

7

SCIENTIFIC COMMUNICATION IN UNDERGRADUATE CHEMISTRY COURSES: A REVIEW.

SCIENTIFIC COMMUNICATION IN UNDERGRADUATE CHEMISTRY COURSES: A REVIEW.

... Journal of Chemical Education (JCE) e Journal of College Science Teaching (JCST), no período de 1991 a 2010, e The Chemical Educator (CE), no período de 1996 (primeiro ano de sua publicação) a ... See full document

10

Identification of the main components of guazatine fungicide by gas chromatography and gas chromatography-mass spectrometry.

Identification of the main components of guazatine fungicide by gas chromatography and gas chromatography-mass spectrometry.

... É grande a dificuldade de se obter padrões para a maioria dos componentes do fungicida guazatine. Há ainda grande in- teresse em identificá-los, principalmente para estudos de de- senvolvimento de métodos de ... See full document

3

PHYSICAL METHODS IN CHEMISTRY INVESTIGATIONS OF THE CHEMISTRY INSTITUTE OF ASM

PHYSICAL METHODS IN CHEMISTRY INVESTIGATIONS OF THE CHEMISTRY INSTITUTE OF ASM

... physical methods are widely used for an ample characterization of new chemical substances synthesized in Institute of Chemistry of the ...these methods have been ... See full document

10

THERMAL CRACKING OF CRUDE GLYCERIN: AN UNDERGRADUATE ORGANIC CHEMISTRY EXPERIMENT.

THERMAL CRACKING OF CRUDE GLYCERIN: AN UNDERGRADUATE ORGANIC CHEMISTRY EXPERIMENT.

... Os experimentos aqui propostos abrangem diversas técnicas experimentais abordadas em disciplina experimental de química orgânica, tais como craqueamento e determinação de ponto de fusã[r] ... See full document

5

Fast Ephedrine Quantification by Gas Chromatography Mass Spectrometry

Fast Ephedrine Quantification by Gas Chromatography Mass Spectrometry

... derivatization of dried urine was a straightforward method for ephedrine quantification based on ...indicated in order to avoid creatinine ...performed, an optimization using multivariate ... See full document

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