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| Content Provider | Springer Nature Link |
|---|---|
| Author | Farajzadeh, Mir Ali Yadeghari, Adeleh Dehghani, Hamideh Dastmalchi, Siavoush |
| Copyright Year | 2017 |
| Abstract | In this study, a dynamic headspace liquid-phase microextraction method is reported for the extraction and preconcentration of pyridine as a decomposition product in some pharmaceuticals before its determination by gas chromatography–flame ionization detection. In the practical procedure, 5 µL of dimethyl sulfoxide (extraction/collection solvent) containing 1-pentanol (internal standard) is placed into a liner-shaped extraction vessel. The vessel is passed through the septum of a vial containing the sample solution. Then it is placed into a water bath thermostated at 70 °C. After a predetermined time, 1 µL of the extraction/collection solvent is removed and injected into the separation system. The factors influencing the extraction efficiency including extraction/collection solvent kind and its volume, ionic strength, extraction time, extraction temperature, and pH were investigated and optimized. Under optimum extraction conditions, the method showed a wide linear range between 0.012 and 500 mg L−1. Enrichment factor and extraction recovery were obtained as 314 and 94%, respectively. Limit of detection was calculated as 0.004 mg L−1 in solution and 0.08 mg kg−1 in solid. Relative standard deviation for the extraction of 0.05 mg L−1 of the analyte was obtained as 4 and 6% for intra-day (n = 6) and inter–day (n = 4) precisions, respectively. Finally, the target analyte was determined in ceftazidime and mouthwash solution by the proposed method. |
| Starting Page | 497 |
| Ending Page | 502 |
| Page Count | 6 |
| File Format | |
| ISSN | 00095893 |
| Journal | Chromatographia |
| Volume Number | 80 |
| Issue Number | 3 |
| e-ISSN | 16121112 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2017-02-03 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Gas chromatography Dynamic headspace-liquid phase microextraction Pharmaceuticals Pyridine Chromatography Proteomics Pharmacy Laboratory Medicine |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Analytical Chemistry Biochemistry Clinical Biochemistry |
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