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1.
Shokuhin Eiseigaku Zasshi ; 59(1): 55-63, 2018.
Artigo em Japonês | MEDLINE | ID: mdl-29743469

RESUMO

An interlaboratory study was performed to evaluate the equivalence between an official method and a modified method of evaporation residue test using three food-simulating solvents (water, 4% acetic acid and 20% ethanol), based on the Japanese Food Sanitation Law for food contact products. Twenty-three laboratories participated, and tested the evaporation residues of nine test solutions as blind duplicates. For evaporation, a water bath was used in the official method, and a hot plate in the modified method. In most laboratories, the test solutions were heated until just prior to evaporation to dryness, and then allowed to dry under residual heat. Statistical analysis revealed that there was no significant difference between the two methods, regardless of the heating equipment used. Accordingly, the modified method provides performance equal to the official method, and is available as an alternative method.


Assuntos
Utensílios de Alimentação e Culinária , Contaminação de Alimentos/análise , Embalagem de Alimentos , Ácido Acético , Etanol , Contaminação de Alimentos/prevenção & controle , Japão , Laboratórios , Soluções , Solventes , Volatilização , Água
2.
Shokuhin Eiseigaku Zasshi ; 59(1): 64-71, 2018.
Artigo em Japonês | MEDLINE | ID: mdl-29743470

RESUMO

An interlaboratory study was performed to evaluate the equivalence between an official method and a modified method of evaporation residue test using heptane as a food-simulating solvent for oily or fatty foods, based on the Japanese Food Sanitation Law for food contact products. Twenty-three laboratories participated, and tested the evaporation residues of nine test solutions as blind duplicates. In the official method, heating for evaporation was done with a water bath. In the modified method, a hot plate was used for evaporation, and/or a vacuum concentration procedure was skipped. In most laboratories, the test solutions were heated until just prior to dryness, and then allowed to dry under residual heat. Statistical analysis revealed that there was no significant difference between the two methods. Accordingly, the modified method provides performance equal to the official method, and is available as an alternative method. Furthermore, an interlaboratory study was performed to evaluate and compare two leaching solutions (95% ethanol and isooctane) used as food-simulating solvents for oily or fatty foods in the EU. The results demonstrated that there was no significant difference between heptane and these two leaching solutions.


Assuntos
Utensílios de Alimentação e Culinária , Contaminação de Alimentos/análise , Embalagem de Alimentos , Etanol , Álcoois Graxos , Contaminação de Alimentos/prevenção & controle , Japão , Laboratórios , Legislação sobre Alimentos , Octanos , Soluções , Volatilização
3.
Shokuhin Eiseigaku Zasshi ; 59(6): 275-281, 2018.
Artigo em Japonês | MEDLINE | ID: mdl-30626785

RESUMO

The aluminium (Al) content of Japanese confectionery and foods containing flour was investigated. Some of these items were investigated in previous studies, which examined foods that made use of baking powder containing aluminium potassium sulfate (Alum). Al was detected in 41 of the 123 samples at levels ranging from 0.01 (limit of quantitation) to 0.40 mg/g. The detection rate of Al in almost all confectionery (except Japanese confectionery) was decreased as compared with previous studies. However, the detection rate of Al in Japanese confectionery and foods containing flour was high. For 4 of the 41 samples tested, consuming one serving once a week would result in an Al intake exceeding the PTWI for young children (body weight=16 kg).


Assuntos
Compostos de Alúmen , Alumínio/análise , Sulfato de Cálcio , Farinha/análise , Contaminação de Alimentos/análise , Bicarbonato de Sódio , Amido , Criança , Humanos
4.
Shokuhin Eiseigaku Zasshi ; 58(3): 166-171, 2017.
Artigo em Japonês | MEDLINE | ID: mdl-28690308

RESUMO

Stainless steel kitchenware and tableware on sale in Japan were investigated. Surface elemental composition ratios of 172 samples were analyzed by the fluorescence X-ray method. High levels of manganese (9.59-20.03%)were detected in 17 samples. This finding was confirmed by ICP analysis. Next, we conducted migration tests. Samples conformed to the Italian Specific Migration Limits. Moreover, lead and antimony were not detected in these samples, in accordance with the Japanese Food Sanitation Law.


Assuntos
Utensílios de Alimentação e Culinária , Legislação sobre Alimentos/normas , Manganês/análise , Aço Inoxidável/química , Antimônio/análise , Cádmio/análise , Cromo/análise , Ferro/análise , Japão , Chumbo/análise , Níquel/análise , Espectrometria por Raios X
5.
Shokuhin Eiseigaku Zasshi ; 57(6): 222-229, 2016.
Artigo em Japonês | MEDLINE | ID: mdl-28025457

RESUMO

The Japanese Food Sanitation Law sets a limit on the migration level of caprolactam for food-contacting nylon products. Here, we carried out an interlaboratory study in twenty laboratories to evaluate the performance of the official GC-FID test method and a GC-MS method as an alternative test method to the official method. Each laboratory quantified caprolactam in three test solutions in 20% ethanol as blind duplicates using GC-FID or GC-MS. The official method (GC-FID with absolute calibration) gave trueness, repeatability (RSDr) and reproducibility (RSDr) values of 96-97%, 3.3-5.4% and 4.0-6.7%, respectively. These values met the target criteria (trueness: 80-110%, RSDr: 10%, RSDr: 25%). The performance of the method was further improved by the introduction of heptalactam as an internal standard. As for GC-MS method, some values of the RSDr exceeded 10% when absolute calibration was used. However, when an internal standard was introduced, the trueness, RSDr and RSDr of GC-MS method were all acceptable at 94-96%, 2.0-4.4% and 7.0-9.4%, respectively. Therefore, GC-MS with an internal standard is available as an alternative test method to the official method.


Assuntos
Caprolactama/análise , Utensílios de Alimentação e Culinária , Análise de Alimentos/métodos , Embalagem de Alimentos , Laboratórios , Nylons/química , Cromatografia Gasosa , Inocuidade dos Alimentos , Cromatografia Gasosa-Espectrometria de Massas , Legislação sobre Alimentos/normas , Espectrometria de Fluorescência
6.
Shokuhin Eiseigaku Zasshi ; 57(5): 169-178, 2016.
Artigo em Japonês | MEDLINE | ID: mdl-27784869

RESUMO

Using polystyrene, acrylonitrile-styrene resin and acrylonitrile-butadiene-styrene resin pellets as samples, an interlaboratory study was performed to evaluate the volatiles test method, based on the specifications described in the Japanese Food Sanitation Law for food-contacting polystyrene products. The study was conducted with the participation of twenty-one laboratories. Each laboratory quantified the contents of styrene, toluene, ethylbenzene, isopropylbenzene and propylbenzene in three test pellets using GC-FID, GC-MS or headspace-GC-FID. Statistical analysis revealed that the repeatability (RSDr) and reproducibility (RSDr) were 1.0-2.6 and 2.5-5.5% for the GC-FID method. The values of the performance parameters fulfilled the requirements (RSDr: 10%, RSDr: 25%), and the performance is sufficient for specifications testing. The RSDr and RSDr of results obtained using the GC-MS and HS-GC methods were 1.4-7.8 and 4.9-13%(GC-MS), and 2.0-2.6 and 3.3-6.9%(HS-GC-FID), respectively. The quantified levels were similar to those obtained with GC-FID. The study suggests that the GC-MS and HS-GC methods can be employed as alternative methods to the GC-FID method.


Assuntos
Resinas Acrílicas/química , Butadienos/química , Utensílios de Alimentação e Culinária , Embalagem de Alimentos , Cromatografia Gasosa-Espectrometria de Massas/métodos , Poliestirenos/química , Compostos Orgânicos Voláteis/análise , Derivados de Benzeno/análise , Japão , Laboratórios , Legislação sobre Alimentos , Reprodutibilidade dos Testes , Espectrometria de Fluorescência/métodos , Estireno/análise , Tolueno/análise
7.
Food Addit Contam Part B Surveill ; 9(3): 185-90, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27092423

RESUMO

Aluminium (Al) levels of 90 food samples were investigated. Nineteen samples contained Al levels exceeding the tolerable weekly intake (TWI) for young children [body weight (bw): 16 kg] when consuming two servings/week. These samples were purchased multiple times at specific intervals and were evaluated for Al levels. Al was detected in 27 of the 90 samples at levels ranging from 0.01 (limit of quantitation) to 1.06 mg/g. Of these, the Al intake levels in two samples (cookie and scone mix, 1.3 and 2 mg/kg bw/week, respectively) exceeded the TWI as established by European Food Safety Authority, although the level in the scone mix was equivalent to the provisional TWI (PTWI) as established by Joint Food and Agriculture Organization of the United Nations/World Health Organization Expert Committee on Food Additives. The Al levels markedly decreased in 14 of the 19 samples with initially high Al levels. These results indicated reductions in the Al levels to below the PTWI limits in all but two previously identified food samples.


Assuntos
Compostos de Alumínio/química , Alumínio/análise , Aditivos Alimentares/química , Análise de Alimentos , Contaminação de Alimentos , Alumínio/toxicidade , Pão/efeitos adversos , Pão/análise , Pão/economia , Pão/normas , Pré-Escolar , Culinária , Dieta/efeitos adversos , Dieta/etnologia , Aditivos Alimentares/efeitos adversos , Aditivos Alimentares/normas , Análise de Alimentos/economia , Inspeção de Alimentos/métodos , Humanos , Hidrólise/efeitos da radiação , Indicadores e Reagentes/química , Internacionalidade , Limite de Detecção , Micro-Ondas , Ácido Nítrico/química , Nível de Efeito Adverso não Observado , Reprodutibilidade dos Testes , Lanches , Espectrofotometria Atômica , Tóquio
8.
Shokuhin Eiseigaku Zasshi ; 56(3): 123-31, 2015.
Artigo em Japonês | MEDLINE | ID: mdl-26156169

RESUMO

Using six kinds of zinc solution in water and 4% acetic acid as samples, an interlaboratory study was performed to evaluate a zinc (Zn) test method for food-contact rubber products, based on the Japanese Food Sanitation Law. Eighteen laboratories participated, and quantified Zn in six test solutions as blind duplicates using flame atomic absorption spectrometry, induced coupled plasma-optical emission spectrometry or induced coupled plasma-mass spectrometry. Statistical analysis revealed that the trueness, repeatability (RSDr) and reproducibility (RSDr) were 97-103%, 0.7-4.9% and 1.7-8.9% by all measuring methods. The values of the performance parameter fulfilled the target value (trueness: 80-110%, RSDr: 10%, RSDr: 25%). The performance of these methods is sufficient for testing the adherence of samples to the specifications.


Assuntos
Utensílios de Alimentação e Culinária , Análise de Alimentos/métodos , Contaminação de Alimentos/análise , Embalagem de Alimentos , Análise de Perigos e Pontos Críticos de Controle/métodos , Espectrometria de Massas/métodos , Borracha/química , Espectrofotometria Atômica/métodos , Zinco/análise , Estudos de Viabilidade , Inocuidade dos Alimentos , Reprodutibilidade dos Testes , Soluções
9.
Shokuhin Eiseigaku Zasshi ; 56(2): 57-67, 2015.
Artigo em Japonês | MEDLINE | ID: mdl-25925077

RESUMO

An interlaboratory study was performed to evaluate a migration test method of antimony (Sb) and germanium (Ge), based on the Japanese Food Sanitation Law for food- contact polyethylene terephthalate. Eighteen laboratories participated, and quantified Sb and Ge in three test solutions as blind duplicates using graphite furnace atomic absorption spectrometry (GF-AAS), inductively coupled plasma-optical emission spectrometry (ICP-OES) or induced coupled plasma-mass spectrometry (ICP-MS). Statistical analysis revealed that the trueness, repeatability and reproducibility were 98-107%, 1.7-7.5% and 2.0-18.8% by using GF-AAS and ICP-OES. The performance of these methods is sufficient for testing the specifications. The performance parameters of ICP-MS were 99-106%, 0.7-2.2% and 2.2-10.5%, respectively. ICP-MS is available as an alternative measuring method. However, in some laboratories, the quantitative values of Sb were higher than the addition levels. We found that Sb in working solutions is absorbed on glass vessels. Careful control of concentration in working solutions is required for Sb analysis.


Assuntos
Antimônio/análise , Utensílios de Alimentação e Culinária , Embalagem de Alimentos , Germânio/análise , Análise de Perigos e Pontos Críticos de Controle/métodos , Laboratórios/normas , Polietilenotereftalatos/química , Inocuidade dos Alimentos , Japão , Legislação sobre Alimentos , Espectrometria de Massas , Reprodutibilidade dos Testes , Soluções , Espectrofotometria Atômica
10.
Shokuhin Eiseigaku Zasshi ; 53(1): 52-6, 2012.
Artigo em Japonês | MEDLINE | ID: mdl-22450670

RESUMO

An improved analysis method for 2-mercaptoimidazoline in rubber products containing chlorine was developed. 2-Mercaptoimidazoline (20 µg/mL) is detected by means of TLC with two developing solvents in the official method. But, this method is not quantitative. Instead, we employed HPLC using water-methanol (9 : 1) as the mobile phase. This procedure decreased interfering peaks, and the quantitation limit was 2 µg/mL of standard solution. 2-Mercaptoimidazoline was confirmed by GC-MS (5 µg/mL) and LC/MS (1 µg/mL) in the scan mode. For preparation of test solution, a soaking extraction method, in which 20 mL of methanol was added to the sample and allowed to stand overnight at about 40°C, was used. This gave similar values to the Soxhlet extraction method (official method) and was more convenient. The results indicate that our procedure is suitable for analysis of 2-mercaptoimidazoline. When 2-mercaptoimidazoline is detected, it is confirmed by either GC/MS or LC/MS.


Assuntos
Cloro/análise , Etilenotioureia/análise , Borracha/análise , Cromatografia Líquida de Alta Pressão/métodos
11.
Shokuhin Eiseigaku Zasshi ; 46(4): 133-8, 2005 Aug.
Artigo em Japonês | MEDLINE | ID: mdl-16180682

RESUMO

Migration from multi-layer laminated film pouches intended for retort foods was investigated through HPLC analysis with a fluorescence detector, and measurements of residue on evaporation, consumption of potassium permanganate and total organic carbon. HPLC analysis revealed that the levels of migrants in oil and the water which were heated in the pouches (121 degrees C, 30 min) were ten times of those in the corresponding official simulants under the official conditions; n-heptane (25 degrees C, 60 min), and water (95 degrees C, 30 min). Bisphenol A diglycidyl ether and related compounds were found in the oil and the water heated in the pouches, as well as in the simulants. These compounds were thought to have been present in the adhesive between the laminated films, and migrated through the food-contact film of the package. Consumption of potassium permanganate and residue on evaporation of the heated water were ten times of those of the water simulant, while the total organic carbon level of the heated water was several-hold greater than that of the water simulant. In addition, migrant levels per surface area of the pouch were one-fourth of the concentrations per content volume of the pouch. Since compliance with the legal limits is evaluated based on the concentration per surface area, real migration into foods would be underestimated by a factor of another four.


Assuntos
Compostos de Epóxi/análise , Análise de Alimentos/métodos , Embalagem de Alimentos , Conservação de Alimentos , Compostos Benzidrílicos , Cromatografia Líquida de Alta Pressão/métodos
12.
Shokuhin Eiseigaku Zasshi ; 45(1): 29-34, 2004 Feb.
Artigo em Japonês | MEDLINE | ID: mdl-15168558

RESUMO

The effect of coexisting metals in a sample on the determination of lead and cadmium in plastics used for food contact materials was investigated. In the official method specified in the Japanese Food Sanitation Law, contents of lead and cadmium are determined by a dry incineration method using sulfuric acid. It was assumed that sometimes, coexisting metals in a sample may form insoluble sulfate and that lead sulfate might be adsorbed into the insoluble sulfate. Therefore, hydrochloric acid was added to the ash, to turn formed insoluble sulfate into soluble compounds (HCl addition method). We found that recoveries of cadmium were not affected in the presence of other metals except when calcium exceeded 20 mg/g in both methods. Recoveries of lead decreased in the presence of barium exceeding 0.1 mg/g or calcium exceeding 10 mg/g in the official method. However, improvement of recoveries was achieved with the HCl addition method and by reducing the sample amount to one-tenth (0.1 g) of that specified in the official method.


Assuntos
Cádmio/análise , Embalagem de Alimentos/legislação & jurisprudência , Chumbo/análise , Metais/análise , Plásticos/análise , Bário/análise , Cálcio/análise , Japão
13.
Shokuhin Eiseigaku Zasshi ; 43(1): 35-8, 2002 Feb.
Artigo em Japonês | MEDLINE | ID: mdl-11998317

RESUMO

A simple method using Florisil cartridges was developed for the determination of dimethylformamide (DMF) in sucrose esters of fatty acids present in sugar esters (SuE) and sucrose acetate isobutyrate (SAIB) used as food additives. SuE was dissolved in acetone and loaded on a Florisil cartridge. SAIB was dissolved in hexane, loaded on a Florisil cartridge and washed with 10% acetone in hexane. The columns were eluted with acetone and DMF in the eluates was determined by GC with an FID detector. Recoveries of DMF at the level of 0.5-100 micrograms/g were 93.3-102.6%. The determination limit was 0.5 microgram/g.


Assuntos
Dimetilformamida/análise , Ácidos Graxos/análise , Aditivos Alimentares/análise , Cromatografia Gasosa , Ésteres/análise , Silicatos de Magnésio
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