Properties of a novel linear sulfur response mode in a multiple flame photometric detector
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- 作者：Adrian G. Clark ; Kevin B. Thurbide
- 关键词：Linear ; Sulfur ; Multiple flame ; Photometric ; Detection
- 刊名：Journal of Chromatography A
- 出版年：24 January, 2014
- 年：2014
- 卷：1326
- 期：Complete
- 页码：103-109
- 全文大小：528 K
文摘
A new linear sulfur response mode was established in the multiple flame photometric detector (mFPD) by monitoring HSO* emission in the red spectral region above 600 nm. Optimal conditions for this mode were found by using a 750 nm interference filter and oxygen flows to the worker flames of this device that were about 10 mL/min larger than those used for monitoring quadratic S2* emission. By employing these parameters, this mode provided a linear response over about 4 orders of magnitude, with a detection limit near 5.8 脳 10鈭?1 gS/s and a selectivity of sulfur over carbon of about 3.5 脳 103. Specifically, the minimum detectable masses for 10 different sulfur analytes investigated ranged from 0.4 to 3.6 ng for peak half-widths spanning 4-6 s. The response toward ten different sulfur compounds was examined and produced an average reproducibility of 1.7% RSD (n = 10) and an average equimolarity value of 1.0 卤 0.1. In contrast to this, a conventional single flame S2* mode comparatively yielded respective values of 6.7% RSD (n = 10) and 1.1 卤 0.4. HSO* emission in the mFPD was also found to be relatively much less affected by response quenching due to hydrocarbons compared to a conventional single flame S2* emission mode. Results indicate that this new alternative linear mFPD response mode could be beneficial for sulfur monitoring applications.