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| Titel: |
An Inexpensive Autosampler to Maximize Throughput for an Ion Source that Samples Surfaces in Open Air |
| Auteur: |
Grange, Andrew H. |
| Verschenen in: |
Environmental forensics |
| Paginering: | Jaargang 9 (2008) nr. 2-3 pagina's 127-136 |
| Jaar: |
2008-04 |
| Inhoud: |
Rapid analysis of hundreds of wipe samples after a chemical dispersion event is essential for quickly characterizing the hazard posed to the public. An autosampler was built to pull 76 cotton swabs mounted along a 91-cm (3-foot) long, square aluminum rod in open air, through the ionizing beam of a direct analysis in real time (DART1) ion source interfaced to a time-of-flight mass spectrometer. The rod and swabs mounted on N-scale model railroad flat cars were pulled through the ion source in 7.5 min by a 7-rpm motor. Percent relative standard deviations (%RSDs) of 18.5% to 21.3% were obtained for the chromatographic peak areas of the protonated molecule. Maximum-to-minimum ratios of the areas were between 2.22 and 2.71. Measured exact masses of analyte ions were always accurate to within 1 mDa. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 1 van 21 gevonden artikelen
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