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  • Tanaka, Aoi  (12)
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  • 1
    Language: Japanese
    In: 食品衛生学雑誌, 2014, Vol.55(2), pp.117-134
    Description: ガラス製,陶磁器製またはホウロウ引きの器具・容器包装,ならびに金属缶のカドミウム(Cd)および鉛(Pb)溶出試験における各測定法の性能を評価するため,試験室間共同試験を行った.当試験には17機関が参加し,濃度非明示の8濃度16検体についてフレーム方式原子吸光光度法(AAS),電気加熱方式原子吸光光度法(GF-AAS),誘導結合プラズマ発光強度測定法(ICP-OES)および誘導結合プラズマ質量分析法(ICP-MS)によりCdおよびPbの定量を行った.その結果,AAS,ICP-OESおよびICP-MS(内標法)では真度が93~105%,併行精度(RSD〈sub〉r〈/sub〉)が0.7~8.4%,室間再現精度(RSD〈sub〉r〈/sub〉)が2.6~19.3%であり,規格試験法として十分な性能を有していることが判明した.一方,GF-AASではいくつかの結果でRSD〈sub〉r〈/sub〉が10%を超えており,適切な精度管理が必要であった.
    Description: An interlaboratory study was performed to evaluate a migration test method of cadmium (Cd) and lead (Pb), based on the Japanese Food Sanitation Law for glassware, ceramicware, enamelware and metal cans. Seventeen laboratories participated, and quantified Cd and Pb in eight test solutions as blind duplicates using flame atomic absorption spectrometry (AAS), 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 (RSD〈sub〉r〈/sub〉) and reproducibility (RSD〈sub〉r〈/sub〉) were 93–105%, 0.7–8.4% and 2.6–19.3% by using AAS, ICP-OES and ICP-MS (internal standard method). The performance of these methods is sufficient for testing specifications. However, some of the RSD〈sub〉r〈/sub〉 values exceeded 10% in GF-AAS, and careful control of accuracy is required.
    Keywords: カドミウム ; 鉛 ; 溶出試験 ; 原子吸光光度法 ; 誘導結合プラズマ発光強度測定法 ; 誘導結合プラズマ質量分析法 ; 試験室間共同試験 ; Cadmium ; Lead ; Migration Test ; Atomic Absorption Spectrometry ; Induced Coupled Plasma-Optical Emission Spectrometry ; Induced Coupled Plasma-Mass Spectrometry ; Interlaboratory Study
    ISSN: 0015-6426
    E-ISSN: 18821006
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  • 2
    Language: English
    In: Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi), 2014, Vol.55(6), pp.269-278
    Description: Based on the Japanese Food Sanitation Law, the performances of official and alternative material test methods for cadmium (Cd) and lead (Pb) in food contact plastics were compared. Nineteen laboratories participated to an interlaboratory study, and quantified Cd and Pb in three PVC pellets. in the official method, a sample is digested with H2SO4, taken up in HCl, and evaporated to dryness on a water bath, then measured by atomic absorption spectrometry (AAS) or inductively coupled plasma-optical emission spectrometry (ICP-OES). Statistical treatment revealed that the trueness, repeatability (RSDr) and reproducibility (RSDr) were 86-95%, 3.1-9.4% and 8.6-22.1%, respectively. The values of the performance parameters fulfilled the requirements , and the performances met the test specifications. The combination of evaporation to dryness on a hot plate and measurement by AAS or ICP-OES is applicable as an alternative method. However, the trueness and RSDr were inferior to those of the official method. The performance parameters obtained by using the microwave digestion method (MW method) to prepare test solution were better than those of the official method. Thus, the MW method is available as an alternative method. Induced coupled plasma-mass spectrometry (ICP-MS) is also available as an alternative method. However, it is necessary to ensure complete digestion of the sample.
    Keywords: Public Health;
    ISSN: 0015-6426
    E-ISSN: 1882-1006
    Source: CrossRef
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  • 3
    Language: English
    In: Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi), 2015, Vol.56(3), pp.123-131
    Description: 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.
    Keywords: Public Health;
    ISSN: 0015-6426
    E-ISSN: 1882-1006
    Source: CrossRef
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  • 4
    Language: Japanese
    In: 食品衛生学雑誌, 2016, Vol.57(5), pp.169-178
    Description: 〈p〉食品衛生法におけるポリスチレン製器具・容器包装の揮発性物質試験の性能を評価するため,ポリスチレン,アクリロニトリル・スチレン共重合樹脂,アクリロニトリル・ブタジエン・スチレン共重合樹脂のペレットを検体として試験室間共同試験を行った.当試験には21機関が参加し,3検体(各2測定)について規制対象であるスチレン,トルエン,エチルベンゼン,イソプロピルベンゼンおよびプロピルベンゼンの含有量をGC-FID,GC-MSおよびヘッドスペース(HS)-GCにより定量した.GC-FIDを用いた方法による併行精度(RSDr)は1.0~2.6%,室間再現精度(RSDr)は2.5~5.8%であり,その性能は目標値を満たしており,規格試験法として十分であった.GC-MSにおけるRSDrは1.4~7.8%,RSDrは4.9~13%,HS-GCにおけるRSDrは2.0~2.6%,RSDrは3.3~6.9%であり,それらの定量値はGC-FIDとほぼ同等であった.そのため,これらは規格試験法の代替法として適用可能であった.〈/p〉
    Description: 〈p〉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.〈/p〉
    Keywords: 器具・容器包装 ; ポリスチレン ; 揮発性物質 ; エチルベンゼン ; スチレン ; ガスクロマトグラフィー ; ヘッドスペースガスクロマトグラフィー ; 試験室間共同試験 ; Food Contact Utensils And Packages ; Polystyrene ; Volatile Substance ; Ethylbenzene ; Styrene ; Gc ; Headspace Gc ; Interlaboratory Study
    ISSN: 0015-6426
    E-ISSN: 18821006
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  • 5
    Language: Japanese
    In: Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 2016, Vol.57(5), pp.169-178
    Description: 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.
    Keywords: Cooking and Eating Utensils ; Food Packaging ; Acrylic Resins -- Chemistry ; Butadienes -- Chemistry ; Gas Chromatography-Mass Spectrometry -- Methods ; Polystyrenes -- Chemistry ; Volatile Organic Compounds -- Analysis
    E-ISSN: 1882-1006
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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  • 6
    Language: Japanese
    In: Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 2015, Vol.56(3), pp.123-31
    Description: 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.
    Keywords: Cooking and Eating Utensils ; Food Packaging ; Food Analysis -- Methods ; Food Contamination -- Analysis ; Hazard Analysis and Critical Control Points -- Methods ; Mass Spectrometry -- Methods ; Rubber -- Chemistry ; Spectrophotometry, Atomic -- Methods ; Zinc -- Analysis
    E-ISSN: 1882-1006
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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  • 7
    Language: Japanese
    In: 食品衛生学雑誌, 2016, Vol.57(6), pp.222-229
    Description: 〈p〉食品衛生法ではナイロン製器具・容器包装からのカプロラクタムの溶出量が規制されている.そこで,公定法であるGC-FID法とその代替法であるGC-MS法の性能を評価するため,20機関で試験室間共同試験を行った.各試験機関は,濃度非明示の20%エタノール溶液(3検体,各2測定)中のカプロラクタムをGC-FIDまたはGC-MSにより定量した.公定法(GC-FIDを用いた絶対検量線による定量)における真度は96~97%,併行精度(RSDr)は3.3~5.4%,室間再現精度(RSDr)は4.0~6.7%であり,これらの値は目標値(真度:80~110%,RSDr: 10%,RSDr: 25%)を満たしていた.さらに,ヘプタラクタムを用いて内標準補正を行うといずれの性能パラメーターも向上した.GC-MS法では,絶対検量線法において一部のRSDrが目標値の10%を超えた.しかし,内標準補正を行うと真度は94~96%,RSDrは2.0~4.4%,RSDrは7.0~9.4%であり,規格試験法の代替法として適用可能であった.〈/p〉
    Description: 〈p〉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.〈/p〉
    Keywords: ナイロン ; カプロラクタム ; ガスクロマトグラフ水素炎イオン化検出器 ; ガスクロマトグラフ質量分析計 ; 試験室間共同試験 ; Nylon ; Caprolactam ; Gc-Fid ; Gc-Ms ; Interlaboratory Study
    ISSN: 0015-6426
    E-ISSN: 18821006
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  • 8
    Language: Japanese
    In: 食品衛生学雑誌, 2018, Vol.59(1), pp.55-63
    Description: 〈p〉水,4%酢酸および20%エタノールの3種類の浸出用液で調製した試験溶液を用い,器具・容器包装の蒸発残留物試験における試験室間共同試験を行い,公定法と公定法変法の性能を評価した.試験には23機関が参加し,濃度非明示の試験溶液9種類の蒸発残留物量を測定した.蒸発乾固の際の加熱装置として,公定法では水浴を,公定法変法ではホットプレートを使用した.ほとんどの試験機関では,蒸発乾固の際,試験溶液を乾固直前まで加熱したのち,余熱で乾固させていた.その結果,加熱装置にかかわらず,両法の性能には大きな差はないことが判明した.それにより,公定法変法は公定法と同様に規格試験法として適用できると判断された.〈/p〉
    Description: 〈p〉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.〈/p〉
    Keywords: 蒸発残留物 ; 器具・容器包装 ; 溶出試験 ; 性能評価 ; 試験室間共同試験 ; Evaporation Residue ; Food Contact Product ; Migration Test ; Performance Evaluation ; Interlaboratory Study
    ISSN: 0015-6426
    E-ISSN: 18821006
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  • 9
    Language: Japanese
    In: Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 2014, Vol.55(6), pp.269-78
    Description: Based on the Japanese Food Sanitation Law, the performances of official and alternative material test methods for cadmium (Cd) and lead (Pb) in food contact plastics were compared. Nineteen laboratories participated to an interlaboratory study, and quantified Cd and Pb in three PVC pellets. in the official method, a sample is digested with H2SO4, taken up in HCl, and evaporated to dryness on a water bath, then measured by atomic absorption spectrometry (AAS) or inductively coupled plasma-optical emission spectrometry (ICP-OES). Statistical treatment revealed that the trueness, repeatability (RSDr) and reproducibility (RSDr) were 86-95%, 3.1-9.4% and 8.6-22.1%, respectively. The values of the performance parameters fulfilled the requirements , and the performances met the test specifications. The combination of evaporation to dryness on a hot plate and measurement by AAS or ICP-OES is applicable as an alternative method. However, the trueness and RSDr were inferior to those of the official method. The performance parameters obtained by using the microwave digestion method (MW method) to prepare test solution were better than those of the official method. Thus, the MW method is available as an alternative method. Induced coupled plasma-mass spectrometry (ICP-MS) is also available as an alternative method. However, it is necessary to ensure complete digestion of the sample.
    Keywords: Cooking and Eating Utensils ; Food Packaging ; Cadmium -- Analysis ; Lead -- Analysis ; Mass Spectrometry -- Methods ; Polyvinyl Chloride -- Analysis ; Spectrophotometry, Atomic -- Methods
    E-ISSN: 1882-1006
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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  • 10
    Language: Japanese
    In: 食品衛生学雑誌, 2015, Vol.56(2), pp.57-67
    Description: ポリエチレンテレフタレート製器具・容器包装のアンチモン(Sb)およびゲルマニウム(Ge)溶出試験における各測定法の性能を評価するため,試験室間共同試験を行った.当試験には18機関が参加し,濃度非明示の3検体(各2測定)について電気加熱方式原子吸光光度法(GF-AAS),誘導結合プラズマ発光強度測定法(ICP-OES)および誘導結合プラズマ質量分析法(ICP-MS)によりSbおよびGeの定量を行った.その結果,GF-AASおよびICP-OESでは,真度が98~107%,併行精度(RSDr)が1.7~7.5%,室間再現精度(RSDr)が2.0~18.8%であり,これらの性能は規格試験法として十分であった.また,ICP-MSでは,真度が99~106%,RSDrが0.7~2.2%,RSDrが2.2~10.5%であり,代替法として適用可能であった.しかし,一部の試験機関ではSbの定量値が添加量よりも高かった.その一因として,検量線溶液中のSbがガラス器具に吸着したためと考えられた.そのため,Sbの試験を行う場合には,検量線溶液の濃度について細心の注意を払う必要があると考えられた.
    Description: 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.
    Keywords: アンチモン ; ゲルマニウム ; 溶出試験 ; 原子吸光光度法 ; 誘導結合プラズマ発光強度測定法 ; 誘導結合プラズマ質量分析法 ; 試験室間共同試験 ; Antimony ; Germanium ; Migration Test ; Atomic Absorption Spectrometry ; Induced Coupled Plasmaoptical Emission Spectrometry ; Induced Coupled Plasma-Mass Spectrometry ; Interlaboratory Study
    ISSN: 0015-6426
    E-ISSN: 18821006
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