کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7642322 | 1494870 | 2016 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An adapted flow injection analysis method of phosphate for estuarine samples avoiding matrix effects
ترجمه فارسی عنوان
یک روش تجزیه و تحلیل جریان تزریق جریان فسفات برای نمونه های استوایی از اجتناب از اثرات ماتریس
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کلمات کلیدی
فسفات، اسستارین، تجزیه و تحلیل تزریق جریان، محدودیت تشخیص،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
A flow injection analysis (FIA) method, based on the molybdenum blue formation, has been adapted and successfully optimized in order to use it to measure phosphate in estuarine water samples. Matrix effects have been avoided using the highest peak, and the Schlieren effect (common in FIA analysis) has been minimized by injecting the ascorbic acid with the same sulphuric acid concentration as the molybdate reagent. The concentrations of the reagents have been optimized by a Central Composite Design. The measuring range used was 0.02-0.2 mg Lâ 1 phosphate and both univariate and multivariate regressions have been compared using a random sample, reaching the same concentration (0.065 ± 0.002 mg Lâ 1). However, the univariate regression showed lower LODs, 7 μg Lâ 1 (74 nM) in front of the 10 μg Lâ 1 (105 nM) reached by the multivariate one. The effectiveness of the developed method was tested with real samples. For this, low-cost conventional equipment easily available to most laboratories has been used, with a LOD low enough to measure estuary samples, and high repeatability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 124, January 2016, Pages 416-421
Journal: Microchemical Journal - Volume 124, January 2016, Pages 416-421
نویسندگان
Leire Kortazar, Sara Alberdi, Eithne Tynan, Luis Angel Fernández,