+ Translate
+ Most Popular
Gaucher's disease;thirty-two years experience at Siriraj Hospital
A study of Macrobathra Meyrick from China (Lepidoptera, Cosmopterigidae)
First occurrence in ores of tetragonal chalcocite
Effects of trace element nutrition on sleep patterns in adult women
N.Z. range management guidelines. 2. Design of grazing management systems for tussock country
A case of lipoma of the esophagus
A revision of world Acanthosomatidae (Heteroptera: Pentatomidae): keys to and descriptions of subfamilies, tribes and genera, with designation of types
Life history of the coronate scyphozoan Linuche unguiculata (Swartz, 1788)
Perceptual restoration of obliterated sounds
Mutagenicity studies on two chromium(III) coordination compounds
The formation of the skeleton. I. Growth of a long bone. 1st appearance of a center of calcification
Leucopenia and abnormal liver function in travellers on malaria chemoprophylaxis
The joint commission: four key root causes loom large in sentinel event data
Treatment of vitiligo with topical 15% lactic acid solution in combination with ultra violet-A
Behaviour of dairy cows within three hours after feed supply: I. Influence of housing type and time elapsing after feed supply
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Management and control of patients with type 2 diabetes mellitus in Lebanon: results from the International Diabetes Management Practices Study (IDMPS)
The diet composition and nutritional knowledge of patients with anorexia nervosa
Physoporella croatica Herak, 1958 of the Slovak karst Anisian (Slovakia, the West Carpathians Mts.)
Bright lights, big noise. How effective are vehicle warning systems?
Ein Plesiosaurier-Rest mit Magensteinen aus mittlerem Lias von Quedlinburg
Incidence of Chlamydia trachomatis in patients with sterility
Monster soup: the microscope and Victorian fantasy
Preliminary tests with residual sprays against poultry lice
Duration of the life of plants in phylogeny

Cross contamination of lead and cadmium during dry ashing of food samples

Cross contamination of lead and cadmium during dry ashing of food samples

Analytical and Bioanalytical Chemistry 373(8): 787-791

ISSN/ISBN: 1618-2642

PMID: 12194040

DOI: 10.1007/s00216-002-1440-6

Common white sugar was ashed in a muffle furnace under controlled heating at 450 degrees C. Together with these samples, sugar with added amounts of Pb and Cd (20, 50 micro g) was mineralized in the same furnace. Depending on the absolute amount of Pb and Cd present in the furnace, an increase in the 'blank' values of the unspiked sugar samples was found. The same effect was observed when reference material containing natural amounts of Pb and Cd (TORT-1, Lobster) was present in the furnace. Although the results strongly depend on the blank levels of the muffle furnace, cross contamination effects could be demonstrated for both elements. The investigations demonstrate, that at a temperature of 450 degrees C, both Cd and Pb are lost during ashing of samples. The type of matrix in a sample with high contents of Pb and Cd has no significant effect on the volatility of these elements. The vapor lost from a sample containing high amounts of Pb and Cd will falsify the concentration in low level samples present in the furnace.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 003697254

Download citation: RISBibTeXText

Related references

Quality assessment of the edible part of mussels: determination of lead and cadmium by atomic absorption spectroscopy and voltammetry Food contamination, includes samples from polluted water in Italy. Recent developments in food analysis: proceedings of the First European Conference on Food Chemistry EURO FOOD CHEM I Vienna Austria 17-20 February 1981 edited by W Baltes PB Czedik Eysenbery W Pfannhauser: 376, 1982

Comparison of microwave digestion with conventional wet ashing and dry ashing digestion for analysis of lead, cadmium, chromium, copper, and zinc in shellfish by flame atomic absorption spectroscopy. Journal of the Association of Official Analytical Chemists 74(3): 566-569, 1991

Cadmium and lead contamination in tap water samples from Tokat, Turkey. Bulletin of Environmental Contamination and Toxicology 75(2): 284-289, 2005

Lead and cadmium contamination during acid preservation of water samples. Bulletin of Environmental Contamination and Toxicology 23(1-2): 107-111, 1979

Food contamination with harmful metals. A hygienic analysis. II. Lead, cadmium, zinc and copper in 20 basic food products. Roczniki Panstwowego Zakladu Higieny 29(6): 611-626, 1978

Contamination of the food chain by cadmium and lead. Archives Belges de Medecine Sociale Hygiene Medecine du Travail et Medecine Legale. Belgisch Archief van Sociale Geneeskunde Hygiene Arbeidsgeneeskunde en Gerechtelijke Geneeskunde 38(4): 237-245, 1980

Environmental contamination with lead. Lead content in bones of hares in the Bern canton. Development of new ashing methods for measurement of lead in bones. Schweizer Archiv für Tierheilkunde 123(6): 311-321, 1981

Lead and cadmium contamination of food. I. Wheat analyses. Il Farmaco; Edizione Pratica 36(4): 223-227, 1981

Experimental investigations on the contamination of a food with residues of lead, zinc, cadmium. Ernahrungs Umschau 24(4): 107-109, 1977

Experimental investigations on the contamination of a food with residues of lead, zinc and cadmium. Ernahrungs Umschau 24(4): 107-109, 1977

Contamination of foods and feeds from selected areas of the district of Erfurt with lead and cadmium. 1. Estimation of lead and cadmium in vegetable material by inverse voltammetry. Nahrung 23(7): 739-747, 1979

Determination of lead and cadmium in food samples by the coprecipitation method. Food Chemistry 113(4): 1314-1317, 2009

Contamination of food and feeds from selected areas of the Erfurt district with lead and cadmium. 3. Burden in commercial agricultural stock animals in area of a lead emmitter as compared to a control area. Die Nahrung 27(2): 147-163, 1983

Investigations of food products for their contamination with harmful metals; hygienic analysis. II. Lead, cadmium, zinc and copper in 20 basic food products. Roczniki 9(6): 611-626, 1978

A correction for soil contamination of herbage samples by dry ashing. New Zealand Journal of Agricultural Research 18(1): 69-71, 1975