Determination of copper, nickel, zinc, cobalt and manganese in seawater by chelation ion chromatography

Caprioli, Raffaela; Torcini, S.

doi:10.1016/0021-9673(93)80204-l

Cited by 35 publications

(8 citation statements)

References 6 publications

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“…Chelation ion chromatography (CIC) (Caprioli & Torcini, 1993; Cardellicchio et al, 1993; Challenger et al, 1993; Siriraks et al, 1990) is available as a stand‐alone technique for overcoming problems with the detection of low and ultralow levels of trace metals in a variety of complex matrixes. CIC's major advantage is that it allows for selective preconcentration of trace analytes from a complex matrix so that they can be quantified by subsequent conventional ion chromatography (IC) or other atom‐specific isolation and detection techniques that allow for the separation of individual analytes.…”

Section: Methods For the Analysis Of Impuritiesmentioning

confidence: 99%

Measurement and Effect of Trace Element Contaminants in Alum

Eyring¹,

Weinberg²,

Singer³

2002

Journal AWWA

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Analytical methods were developed to accurately determine the levels of the most prevalent trace metal contaminants in a variety of alum feedstocks used in the coagulation process of drinking water treatment. A combination of chelation ion chromatography, chelation extraction–atomic absorption spectrometry, and hydride generation atomic fluorescence allowed for the selective isolation of trace metals from the alum matrix with a high degree of precision and sensitivity. Trace levels of arsenic, cadmium, chromium, copper, manganese, nickel, lead, and zinc were found in the range of 20–330 μg/g aluminum (Al); iron, recognized as a co‐contaminant in the raw material, was present at 20 mg/g Al. By extrapolating these measured levels to an upper yet realistic applied dosage of alum in drinking water treatment, the authors could predict the contaminants' concentrations (under a worst‐case scenario) in both the finished water and alum sludge. For finished water even if it was assumed that none of the trace metals was removed during coagulation, the contaminants' concentrations did not exceed drinking water standards, and their contribution reached only a small fraction of the permitted maximum contaminant level. In a scenario in which the trace metals were assumed to be removed during the coagulation process, levels that would accumulate in the alum sludge would not be significant enough to heavily influence decisions to apply alum sludge to land for agricultural uses.

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Section: Methods For the Analysis Of Impuritiesmentioning

confidence: 99%

Measurement and Effect of Trace Element Contaminants in Alum

Eyring¹,

Weinberg²,

Singer³

2002

Journal AWWA

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“…water, plants, animals, and soils can provide important information for the control of food and water, and environmental monitoring 2,3 . At present, several techniques such as ions chromatography 4 , liquid-liquid extraction with atomic absorption spectrometry 5 , atomic fluorescence spectrometry 6 , X-ray fluorescence spectrometry 7,8 and inductively coupled plasma atomic emission spectrometry 9 , show good sensitivity but is limited because of expensive instrumentation and high cost for routine analysis. In this study, we wish to report this reagent as a selective reagent in spectrophotometric determination of micro amounts of nickle(II).…”

Section: Research Articlementioning

confidence: 99%

Preparation, Characterization, Analytical and Thermodynamic Studies of Complex of Ni(II) with Antipyriyl azo-1-nitrozo-2-naphthol as a Complexing Reagent

2015

Chem Sci Trans

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A new, simple, sensitive and rapid spectrophotometric method is proposed for the determination of trace amount of nickle(II). The method is based on the formation of a 2:1 complex with 3-(4 ′-antipyriyl azo) 1-nitroso-2-naphthol (APANN) as a new reagent is developed. The complex has a maximum absorption at 469 nm and ε max of 0.6x10 5 L. mol-1 cm-1. A linear correlation (0.1-1.8 μg. mL-1) was found between absorbance at λ max and concentration. The accuracy and reproducibility of the determination method for various known amounts of nickle (II) were tested. The results obtained are both precise (RSD was better than 0.11%) and accurate (relative error was better than 0.97%). The effect of diverse ions on the determination of nickle(II) to investigate the selectivity of the method were also studied. The stability constant of the product was 0.1x10 7 L. mol-1. The proposed method was successfully applied to the analysis of synthetic mixtures and raw milk without any preliminary concentration or separation, The apparent thermodynamic parameters were estimated and the obtained results concluded that. The thermodynamic Parameters like ΔGº, ΔHº and ΔSº have been calculated from the effect of temperature on reaction process,its found from these process is Endothermic and spontaneous.

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“…At pH 5.2-5.6 polyvalent metal ions are selectively concentrated into MetPac CC-1, alkali metals and anions are not retained, and a selective elution of alkali earth metals can be achieved using ammonium acetate. The procedure was successfully used for metal ion determination in seawater from the Venice Lagoon, and with 60 ml sample preconcentration the detection limits for Cu, Ni, Zn, Co and Mn were lowered to 0.05-0.1 flg rl (Caprioli and Torcini 1993). UV-VIS spectrophotometric detection is accomplished after post-column derivatization (PAR), and detection limits (Fe, Cu, Ni, Zn, Co, Mn, Cd, Pb) range from 0.2 to 1 flg rl (Siriraks et al 1990;Dionex 1990).…”

Section: Analytical Applicationsmentioning

confidence: 99%