Headspace generation coupled to gas chromatography–mass spectrometry for the automated determination and quantification of endogenous compounds in urine. Aldehydes as possible markers of oxidative stress
•HS-PTV-GC–MS coupling for determination of five aldehydes in urine samples.•Minimization of sample manipulation and shortening of pre-treatment time.•Simplification due to no derivatization requirement.•External calibration for quantification of analytes in healthy subjects’ urine.•LODs obtained ra...
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| Published in | Journal of Chromatography A Vol. 1367; pp. 9 - 15 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
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Amsterdam
Elsevier B.V
07.11.2014
Elsevier |
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| Abstract | •HS-PTV-GC–MS coupling for determination of five aldehydes in urine samples.•Minimization of sample manipulation and shortening of pre-treatment time.•Simplification due to no derivatization requirement.•External calibration for quantification of analytes in healthy subjects’ urine.•LODs obtained ranged between 0.04 and 0.08μg/L.
A methodology for the determination of five aldehydes in urine has been developed based on the coupling of a headspace generation sampler with a gas chromatography–mass spectrometry system equipped with a programmed temperature vaporizer. This instrumental configuration minimizes sample manipulation and allows the determination of these compounds without the need for a derivatization step so that the methodology is largely shortened and simplified. An experimental design was carried out in order to optimize the headspace sampling. Sample matrix effect was eliminated by means of dilution of urine samples. The calibration models displayed good linearity (0.1–10μg/L) and their validity was checked using ANOVA, and it was observed that they did not exhibit any lack of fit. The LODs obtained ranged between 0.04 and 0.08μg/L and the LOQs between 0.12 and 0.24μg/L. The accuracy of the method was evaluated in terms of apparent recoveries which were between 86 and 120%. The method developed was applied to the analysis of 17 samples of urine from different subjects in order to quantify these endogenous compounds. |
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| AbstractList | A methodology for the determination of five aldehydes in urine has been developed based on the coupling of a headspace generation sampler with a gas chromatography-mass spectrometry system equipped with a programmed temperature vaporizer. This instrumental configuration minimizes sample manipulation and allows the determination of these compounds without the need for a derivatization step so that the methodology is largely shortened and simplified. An experimental design was carried out in order to optimize the headspace sampling. Sample matrix effect was eliminated by means of dilution of urine samples. The calibration models displayed good linearity (0.1-10 mu g/L) and their validity was checked using ANOVA, and it was observed that they did not exhibit any lack of fit. The LODs obtained ranged between 0.04 and 0.08 mu g/L and the LOQs between 0.12 and 0.24 mu g/L. The accuracy of the method was evaluated in terms of apparent recoveries which were between 86 and 120%. The method developed was applied to the analysis of 17 samples of urine from different subjects in order to quantify these endogenous compounds. A methodology for the determination of five aldehydes in urine has been developed based on the coupling of a headspace generation sampler with a gas chromatography–mass spectrometry system equipped with a programmed temperature vaporizer. This instrumental configuration minimizes sample manipulation and allows the determination of these compounds without the need for a derivatization step so that the methodology is largely shortened and simplified. An experimental design was carried out in order to optimize the headspace sampling. Sample matrix effect was eliminated by means of dilution of urine samples. The calibration models displayed good linearity (0.1–10μg/L) and their validity was checked using ANOVA, and it was observed that they did not exhibit any lack of fit. The LODs obtained ranged between 0.04 and 0.08μg/L and the LOQs between 0.12 and 0.24μg/L. The accuracy of the method was evaluated in terms of apparent recoveries which were between 86 and 120%. The method developed was applied to the analysis of 17 samples of urine from different subjects in order to quantify these endogenous compounds. A methodology for the determination of five aldehydes in urine has been developed based on the coupling of a headspace generation sampler with a gas chromatography-mass spectrometry system equipped with a programmed temperature vaporizer. This instrumental configuration minimizes sample manipulation and allows the determination of these compounds without the need for a derivatization step so that the methodology is largely shortened and simplified. An experimental design was carried out in order to optimize the headspace sampling. Sample matrix effect was eliminated by means of dilution of urine samples. The calibration models displayed good linearity (0.1-10 μg/L) and their validity was checked using ANOVA, and it was observed that they did not exhibit any lack of fit. The LODs obtained ranged between 0.04 and 0.08 μg/L and the LOQs between 0.12 and 0.24 μg/L. The accuracy of the method was evaluated in terms of apparent recoveries which were between 86 and 120%. The method developed was applied to the analysis of 17 samples of urine from different subjects in order to quantify these endogenous compounds. •HS-PTV-GC–MS coupling for determination of five aldehydes in urine samples.•Minimization of sample manipulation and shortening of pre-treatment time.•Simplification due to no derivatization requirement.•External calibration for quantification of analytes in healthy subjects’ urine.•LODs obtained ranged between 0.04 and 0.08μg/L. A methodology for the determination of five aldehydes in urine has been developed based on the coupling of a headspace generation sampler with a gas chromatography–mass spectrometry system equipped with a programmed temperature vaporizer. This instrumental configuration minimizes sample manipulation and allows the determination of these compounds without the need for a derivatization step so that the methodology is largely shortened and simplified. An experimental design was carried out in order to optimize the headspace sampling. Sample matrix effect was eliminated by means of dilution of urine samples. The calibration models displayed good linearity (0.1–10μg/L) and their validity was checked using ANOVA, and it was observed that they did not exhibit any lack of fit. The LODs obtained ranged between 0.04 and 0.08μg/L and the LOQs between 0.12 and 0.24μg/L. The accuracy of the method was evaluated in terms of apparent recoveries which were between 86 and 120%. The method developed was applied to the analysis of 17 samples of urine from different subjects in order to quantify these endogenous compounds. |
| Author | Antón, Ana Pérez Pavón, José Luis Pérez Ferreira, Ana María Casas Pinto, Carmelo García Cordero, Bernardo Moreno |
| Author_xml | – sequence: 1 givenname: Ana Pérez surname: Antón fullname: Antón, Ana Pérez – sequence: 2 givenname: Ana María Casas surname: Ferreira fullname: Ferreira, Ana María Casas – sequence: 3 givenname: Carmelo García surname: Pinto fullname: Pinto, Carmelo García – sequence: 4 givenname: Bernardo Moreno surname: Cordero fullname: Cordero, Bernardo Moreno – sequence: 5 givenname: José Luis Pérez surname: Pavón fullname: Pavón, José Luis Pérez email: jlpp@usal.es |
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| Keywords | Urine Oxidative stress Aldehydes Headspace generation Biological fluid Chemical analysis Biological marker Alkanal Optimization Smoker Quantitative analysis Human Automation Healthy subject Coupled method Benzaldehyde Endogenous substance Volatile organic compound Aldehyde Non smoker Gas chromatography Experimental design Headspace Mass spectrometry Chemometrics |
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| Snippet | •HS-PTV-GC–MS coupling for determination of five aldehydes in urine samples.•Minimization of sample manipulation and shortening of pre-treatment... A methodology for the determination of five aldehydes in urine has been developed based on the coupling of a headspace generation sampler with a gas... |
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| SubjectTerms | Adult Aldehydes Aldehydes - analysis Aldehydes - urine Analysis of variance automation Automation, Laboratory Biological and medical sciences Biomarkers - urine Calibration derivatization experimental design Gas chromatography gas chromatography-mass spectrometry Gas Chromatography-Mass Spectrometry - methods headspace analysis Headspace generation Humans Joining Limit of Detection Linearity Mass spectrometry Medical sciences Methodology Middle Aged Oxidative Stress Temperature Tobacco, tobacco smoking Toxicology Urine Young Adult |
| Title | Headspace generation coupled to gas chromatography–mass spectrometry for the automated determination and quantification of endogenous compounds in urine. Aldehydes as possible markers of oxidative stress |
| URI | https://dx.doi.org/10.1016/j.chroma.2014.09.038 https://www.ncbi.nlm.nih.gov/pubmed/25280875 https://www.proquest.com/docview/1635041900 https://www.proquest.com/docview/1800430701 https://www.proquest.com/docview/2101372293 |
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