کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1243884 | 969673 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reversed flow injection spectrophotometric determination of chlorate
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An interfacing has been developed to connect a spectrophotometer with a personal computer and used as a readout system for development of a simple, rapid and sensitive reversed flow injection (rFI) procedure for chlorate determination. The method is based on the oxidation of indigo carmine by chlorate ions in an acidic solution (dil. HCl) leading to the decrease in absorbance at 610 nm. The decrease in absorbance is directly related to the chlorate concentration present in the sample solutions. Optimum conditions for chlorate were examined. A linear calibration graph over the range of 0.1-0.5 mg Lâ1 chlorate was established with the regression equation of Y = 104.5X + 1.0, r2 = 0.9961 (n = 6). The detection limit (3Ï) of 0.03 mg Lâ1, the limit of quantitation (10Ï) of 0.10 mg Lâ1 and the RSD of 3.2% for 0.3 mg Lâ1 chlorate (n = 11) together with a sample throughput of 92 hâ1 were obtained. The recovery of the added chlorate in spiked water samples was 98.5 ± 3.1%. Major interferences for chlorate determination were found to be BrO3â, ClO2â, ClOâ and IO3â which were overcome by using SO32â (as Na2SO3) as masking agent. The method has been successfully applied for the determination of chlorate in spiked water samples with the minimum reagent consumption of 14.0 mL hâ1. Good agreement between the proposed rFIA and the reference methods was found verified by Student's t-test at 95% confidence level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 79, Issue 4, 15 September 2009, Pages 1181-1187
Journal: Talanta - Volume 79, Issue 4, 15 September 2009, Pages 1181-1187
نویسندگان
Thanyarat Chuesaard, Tharinee Wonganan, Teerapol Wongchanapiboon, Saisunee Liawruangrath,