| Title: | High-yield UV-photochemical vapor generation of iron for sample introduction with inductively coupled plasma optical emission spectrometry |
| Author(s): | Zheng C; Sturgeon RE; Brophy CS; He S; Hou X; |
| Address: | "College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China" |
| ISSN/ISBN: | 1520-6882 (Electronic) 0003-2700 (Linking) |
| Abstract: | "A novel approach to the generation of volatile iron compounds (likely the pentacarbonyl) with high efficiency is described, wherein solutions containing either Fe(2+) or Fe(3+) and low molecular weight organic acids such as formic, acetic or propionic are exposed to a UV source. An optimum generation efficiency of 60 +/- 2% was achieved in 50% formic acid at pH 2.5 with an irradiation time of 250 s by use of a 17 W low-pressure mercury grid lamp. Compared to conventional solution nebulization, sensitivity and limit of detection were improved 80- and 100-fold, respectively, at the 238.204 nm Fe II emission line. A precision of 0.75% RSD was achieved at a concentration of 100 ng/mL. Photochemical vapor generation sample introduction was used for the determination of trace iron in several environmental Certified Reference Materials, including National Research Council Canada DORM-3 fish muscle tissue, DOLT-3 and DOLT-4 fish liver tissues, and SLRS-5 river water, providing analytical results in excellent agreement with certified values based on a simple external calibration" |
| Keywords: | "Acetic Acid/chemistry Environmental Pollutants/analysis Formates/chemistry Gases/*chemistry Iron/*analysis Photochemical Processes Propionates/chemistry Spectrophotometry, Atomic/*methods *Ultraviolet Rays;" |
| Notes: | "MedlineZheng, Chengbin Sturgeon, Ralph E Brophy, Christine S He, Shaopan Hou, Xiandeng eng Research Support, Non-U.S. Gov't 2010/03/13 Anal Chem. 2010 Apr 1; 82(7):2996-3001. doi: 10.1021/ac100059b" |
