摘要:

This monitoring study of 192 samples of cow's milk collected from the central region of Veracruz state was conducted to determine the contamination levels of organochlorine pesticides. The results obtained for mean DDT and HCH levels were 0057 and 0098 mg/ kg respectively expressed on fat basis and are within FAO tolerances and similar to those found in other tropical countries.

ISSN:0265-203X    

DOI:10.1080/02652039609374401

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

This paper describes the results of investigations into the concentrations of lead and cadmium in tissues of pigs and cattle from slaughterhouses in Slovenia in the period between 1989 and 1993. Analyses were performed by flame atomic absorption spectrometry. Quality assurance was carried out by analysis of certified reference materials and recovery tests. The mean concentrations of lead in bovine meat, liver and kidney were 0.05, 0.10 and 0.14 mg/kg wet weight and those in the corresponding pig tissues were <0.05, 0.06 and 0.06 mg/kg wet weight. The mean cadmium concentrations in bovine meat, liver and kidney were 0004, 0094 and 0.373 mg/kg wet weight, respectively, while those in the corresponding pig tissues were 0.010, 0.088 and 0.393 mg/kg wet weight. The majority of tissues analysed corresponded to our valid tolerances for both elements, which had not been the case in the previous 5 year period. The agreement with tolerances was to be expected because in 1990 the Veterinary Directorate of Slovenia prescribed a directive on the basis of which kidneys of cattle older than 5 years and pigs older then 2 years should be regarded as unfit for human consumption.

ISSN:0265-203X    

DOI:10.1080/02652039609374402

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Two different films, low density polyethylene (LDPE) and an ethylene‐viny1 acetate copolymer (EVA), used as agricultural soil covers were studied. The films were recycled five and ten times respectively, and both the tensile strength and the content of Chimassorb 81, a UV‐stabilizer, were analysed in each cycle. Losses of 17.44% in tensile strength and 23.69% (Thermic film) and 13.22% (EVA) in the concentration of Chimassorb 81 were found after five recycling cycles. The extraction of Chimassorb 81 from the film is optimized. As these films can be recycled for the same application or even for use as food‐contact materials, the standard migration tests with established simulants have been carried out. The results obtained are discussed.

ISSN:0265-203X    

DOI:10.1080/02652039609374403

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

ISSN:0265-203X    

DOI:10.1080/02652039609374404

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Guidelines for Achieving Quality in Trace Analysis.Edited by M. Sargent and G. MacKay (Royal Society of Chemistry, Cambridge, 1995). [Pp. viii + 48]. Price £12.50. ISBN 0–85404–402–7.

ISSN:0265-203X    

DOI:10.1080/02652039609374405

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

ISSN:0265-203X    

DOI:10.1080/02652039609374406

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

ISSN:0265-203X    

DOI:10.1080/02652039609374390

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor