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A Modified o-Phthalaldehyde Fluorometric Analytical Method for Ultratrace Ammonium in Natural Waters Using EDTA-NaOH as Buffer
المؤلفون المشاركون
Hu, Hongzhi
Liang, Ying
Li, Shuo
Guo, Qing
Wu, Chancui
المصدر
Journal of Analytical Methods in Chemistry
العدد
المجلد 2014، العدد 2014 (31 ديسمبر/كانون الأول 2014)، ص ص. 1-7، 7ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2014-11-11
دولة النشر
مصر
عدد الصفحات
7
التخصصات الرئيسية
الملخص EN
In the existence of appropriate amount of disodium ethylenediaminetetraacetate (EDTA), precipitation would not occur in seawater and other natural waters even if the sample solution was adjusted to strong basicity, and the NH3-OPA-sulfite reaction at the optimal pH range could be used to determine ammonium in natural waters.
Based on this, a modified o-phthalaldehyde fluorometric analytical method has been established to determine ultratrace ammonium in natural waters.
Experimental parameters, including reagent concentration, pH, reaction time, and effect of EDTA, were optimized throughout the experiments based on univariate experimental design.
The results showed that the optimal pH range was between 10.80 and 11.70.
EDTA did not obviously affect the fluorometric intensity.
The linearity range of the proposed method was 0.032–0.500 µmol/L, 0.250–3.00 µmol/L, and 1.00–20.0 µmol/L at the excitation/emission slit of 3 nm/5 nm, 3 nm/3 nm, and 1.5 nm/1.5 nm, respectively.
The method detection limit was 0.0099 µmol/L.
Compared to the classical OPA method, the proposed method had the advantage of being more sensitive and could quantify ultratrace ammonium without enrichment.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Hu, Hongzhi& Liang, Ying& Li, Shuo& Guo, Qing& Wu, Chancui. 2014. A Modified o-Phthalaldehyde Fluorometric Analytical Method for Ultratrace Ammonium in Natural Waters Using EDTA-NaOH as Buffer. Journal of Analytical Methods in Chemistry،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1039837
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Hu, Hongzhi…[et al.]. A Modified o-Phthalaldehyde Fluorometric Analytical Method for Ultratrace Ammonium in Natural Waters Using EDTA-NaOH as Buffer. Journal of Analytical Methods in Chemistry No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-1039837
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Hu, Hongzhi& Liang, Ying& Li, Shuo& Guo, Qing& Wu, Chancui. A Modified o-Phthalaldehyde Fluorometric Analytical Method for Ultratrace Ammonium in Natural Waters Using EDTA-NaOH as Buffer. Journal of Analytical Methods in Chemistry. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1039837
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1039837
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