Noroozifar Meissam, Khorasani-Motlagh Mozhgan, Akbari Reza
Analytical Research Laboratory, Department of Chemistry, University of Sistan & Baluchestan, P.O. Box 98155-147, Zahedan, Iran.
J Autom Methods Manag Chem. 2007;2007:34373. doi: 10.1155/2007/34373.
In this approach, a pneumatic flow injection-tandem spectrometer system, without a delivery pump, has been developed to study chromium speciation. In this system, suction force of pneumatic nebulizer of a flame atomic absorption spectrometer has been used for solution delivery through the manifold. Cr(VI) and total Cr concentrations were determined using UV-Vis and FAAS spectrometers, respectively. The Cr(III) was determined by difference. The calibration curves were linear up to 10 mug mL-1 and 20 mug mL-1 for Cr(VI) and total Cr with detection limit of 0.12 mug mL-1 and 0.07 mug mL-1 for Cr(VI) and Cr(III), respectively. The midrange precision and accuracy are less than 1.98% and +/- 2.50% for two species, respectively, at a sampling rate of 100 h-1. This system was applied for the determination of the chromium species in spiked and natural waters as well as industrial waters.
在这种方法中，已开发出一种不带输送泵的气动流动注射-串联光谱仪系统来研究铬的形态。在该系统中，火焰原子吸收光谱仪的气动雾化器的吸力被用于通过歧管输送溶液。分别使用紫外可见光谱仪和火焰原子吸收光谱仪测定Cr(VI)和总铬浓度。通过差值法测定Cr(III)。Cr(VI)和总铬的校准曲线在高达10 μg mL-1和20 μg mL-1时呈线性，Cr(VI)和Cr(III)的检测限分别为0.12 μg mL-1和0.07 μg mL-1。在100 h-1的采样率下，两种形态的中等精度和准确度分别小于1.98%和±2.50%。该系统应用于加标水样、天然水样以及工业废水中铬形态的测定。
Zotero 插件
