Flow-injection determination of low levels of ammonium ions in natural waters employing preconcentration with a cation-exchange resin

Marina, Menezes Santos Filha; Reis, Boaventura F.; Fo, H. Bergamin; Baccan, Nivaldo

doi:10.1016/0003-2670(92)80211-o

Cited by 18 publications

(2 citation statements)

References 8 publications

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“…is often analyzed by Nessler's reagent spectrophotometry [24,25] and ion chromatography [26], our experiment results show that DEHA interferes with the analysis of NH 4 ? by Nessler's reagent spectrophotometry, so we choose ion chromatography to analyze NH 4 ?…”

Section: Nhmentioning

confidence: 54%

γ-ray damage of N,N-diethyl-hydroxylamine in water and its radiolytic products at lower dose

Wang

et al. 2015

J Radioanal Nucl Chem

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N,N-Diethyl-hydroxylamine (DEHA) is a novel salt-free reductant used in the reprocessing of spent fuel, this paper reports on c-rays damage of 0.1-0.5 mol L -1 DEHA irradiated 5-25 kGy and its radiolytic products. DEHA is relative stable against radiation, its radiolysis rate increases with the dose, but decreases with increasing initial DEHA concentration. The main radiolytic products are hydrogen, ethene, methane, acetaldehyde and ammonium ion, their quantities increase with initial DEHA concentration. Hydrogen and liquid radiolytic products quantities increase with the dose, the dependence of hydrocarbon quantity on dose relates to original DEHA concentration and dose.

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Section: Nhmentioning

confidence: 54%

γ-ray damage of N,N-diethyl-hydroxylamine in water and its radiolytic products at lower dose

Wang

et al. 2015

J Radioanal Nucl Chem

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“…Several methods have been proposed for the analysis of ammonium [10], such as spectrophotometry [11,12,13], ion selective electrode [14], fluorimetry [15,16] or ion chromatography [17]. Primary amines/amino acids are generally analyzed individually by liquid chromatography [18,19], but methods have also been developed to measure the total concentrations of these compounds in order to have a rapid and global assay of these important nitrogen compounds.…”

Section: Introductionmentioning

confidence: 99%

High throughput determination of ammonium and primary amine compounds in environmental and food samples

Robert‐Peillard

Palacio

Ciulu

et al. 2017

Microchemical Journal

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In this paper, an improved spectrofluorimetric method for the simultaneous and direct determination of ammonium and primary amine compounds is presented. The method is based on the derivatization with o-phthaldialdehyde (OPA) / N-acetylcysteine (NAC) reagent using high throughput microplates, and OPA/NAC ratio has been optimized in order to suppress interference of ammonium on primary amine determination. Direct measurement of these two parameters is therefore possible with a global procedure time that does not exceed ten minutes. Excellent limits of detection of 1.32 µM and 0.55 µM have been achieved for ammonium and primary amines, respectively. Reagent stability issues have also been addressed and formulation of reagents solution is described for improved reagents shelf life. The proposed protocol was finally applied and validated on real samples such as wine samples, compost extracts and wastewater.

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Advances in Flow Analysis – Instrumentation and its Application in Environmental Analysis

Berman¹

1995

Quality Assurance in Environmental Monitoring

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Flow-injection determination of low levels of ammonium ions in natural waters employing preconcentration with a cation-exchange resin

Cited by 18 publications

References 8 publications

γ-ray damage of N,N-diethyl-hydroxylamine in water and its radiolytic products at lower dose

γ-ray damage of N,N-diethyl-hydroxylamine in water and its radiolytic products at lower dose

High throughput determination of ammonium and primary amine compounds in environmental and food samples

Advances in Flow Analysis – Instrumentation and its Application in Environmental Analysis

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