Sequential determination of lead and cobalt in tap water and foods samples by fluorescence

Talio, María Carolina; Alesso, Magdalena; Acosta, María Gimena; Acosta, Mariano; Fernández, Liliana Patricia

doi:10.1016/j.talanta.2014.04.020

Cited by 23 publications

(11 citation statements)

References 17 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to researchers, the preconcentration and separation of metals by solid-phase extraction (with paper filter) can be followed by spectrofluorimetric determination. Detection limits have been found to be 0.043 and 0.0219 μg/l (signal/noise = 3) for Pb(II) and Co(II) ions, respectively, [12]. The new methodology has obtained satisfactory results when speaking of the determination of trace amounts of Pb and Co in foods samples (milk powder, express coffee and cocoa powder) and tap waters from different regions of Argentina [12].…”

Section: Methodsmentioning

confidence: 96%

“…333/2007 [11]. Pb and Co contamination in tap water and food samples can be also detected with a new procedure based on the formation of complexes of metal ions with 8-hydroxyquinolein in aqueous solution [12]. According to researchers, the preconcentration and separation of metals by solid-phase extraction (with paper filter) can be followed by spectrofluorimetric determination.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Inorganic Contaminants of Food as a Function of Packaging Features

Montanari

2015

Food Packaging Hygiene

View full text Add to dashboard Cite

Metals are the most abundant group of chemical elements on the earth's crust and can be found in all foods. Some of them are essential to the diet, within certain specific tolerances, while others are present as contaminants and pose a risk to the human health. The knowledge of the risk by metal contamination in foodstuffs is an argument of great importance. Along the production chain, foods may come in contact with metals at different stages of the production process: parts of industrial plants, storage tanks, tools and mainly primary packaging. Some packaging materials are metallic; in other situations (plastics, etc.), metals are only one of components with a specific role. After an introduction on the international legislation, this chapter examines the main types of food containers-from metallic to plastic ones-considering the function of the metal, both as structural material or additive. For each material and packaging, factors affecting the related risk of contamination are analysed. Some case studies are examined referring to stainless steel, tinplate, aluminium, plastics and innovative packaging. The chapter concludes with a critical review with relation to some examples of metal concentration found in preserved foods, with a particular focus on heavy metals.

show abstract

Section: Methodsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Inorganic Contaminants of Food as a Function of Packaging Features

Montanari

2015

Food Packaging Hygiene

View full text Add to dashboard Cite

show abstract

“…The main way of contamination is through the consumption of contaminated food and water [80]. Lead poisoning affects the function of the brain and nervous system, reduces the level of intelligence, observation and memory.…”

Section: (2) (2017) 84-95mentioning

confidence: 99%

A review of the presence of some food contaminants on the territory of the Republic of Serbia

Danilović¹,

Potić²,

Stamenković³

et al. 2017

Adv Techol

View full text Add to dashboard Cite

Food contamination is one of the major problems in food distribution. Microorganisms and their metabolites are the most common food contaminants. This review consolidates the reported food contamination cases in the Republic of Serbia. Mycotoxins were stated as the most common contaminants in various foods. Among them mycotoxins like zearalenone, aflatoxins, fumonisins, and deoxynivalenol were the most frequently detected. Also, the contamination caused by the presence of various microorganisms like L. monocytogenes, E. coli, Salmonella spp. and S. aureus was reported in high frequency. The microbial contamination was usually detected in meat and dairy products. Although heavy metals were detected in some products, in most cases their concentrations were in accordance with the legislation. A higher level of Pb and Hg was stated only in a few samples of tea, milk and fish. The constant analysis, control and prevention are needed at all levels of the production in order to compile the safety requirements and international legislation.

show abstract

“…Therefore, analytical methodologies to determine trace levels of this element are required 7 . Consequently, many analytical methods have been developed to determine Pb (II): atomic absorption spectrometry (AAS) 8,9 , inductively coupled plasma mass spectrometry (ICP-MS) [10][11][12][13] , and atomic fluorescence spectrometry (AFS) 14,15 . Although these techniques are selective and have high sensitivity, they are somewhat time-consuming, expensive and not allow in situ measurement.…”

Section: Introductionmentioning

confidence: 99%

Anodic Stripping Voltammetric Determination of Lead Using a Chemically Modified Electrode Based on Aza Crown Ether

Segura

Díaz

Pìzarro

et al. 2017

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

A glassy carbon electrode was modified by drop-coating technique using 1,4,10,13-Tetraoxa-7,16-diazaciclooctadecano (diaza-18-crown-6 or DA18C6) and Nafion (NF) for the determination of Pb (II) by square wave anodic stripping voltammetric (SWASV). The new electrode exhibits an increase in due to major pre-concentration of aza crown ether and ionic exchange of NF with metal cations. Optimal conditions were: 3 mmol L-1 DA18C6, 3 wt % NF, 10 mmol L-1 HCl as supporting electrolyte, a frequency of 15 Hz , an accumulation time of 300 s and an accumulation potential of-0.80 V. The detection limit was 0.09 µg L-1 and linear range was 10-50 µg L-1. Interference from metal ions such us Fe (II), Pb (II), Cd (II) and Cu (II) was also studied. The method is sensitive, selective and simple with a relative standard deviation of 11%.

show abstract

Sequential determination of lead and cobalt in tap water and foods samples by fluorescence

Cited by 23 publications

References 17 publications

Inorganic Contaminants of Food as a Function of Packaging Features

Inorganic Contaminants of Food as a Function of Packaging Features

A review of the presence of some food contaminants on the territory of the Republic of Serbia

Anodic Stripping Voltammetric Determination of Lead Using a Chemically Modified Electrode Based on Aza Crown Ether

Contact Info

Product

Resources

About