18 Simultaneous Determination of Glycyrrhizinic acid, Stevioside and Rebaudioside A in Food by Solid Phase Extraction and HPLC
|
| Hideki OZAWA, Masako HIROKADO, Nobuo TAGUCHI, Chigusa KOBAYASHI, Yukiko YAMAJIMA and Kazuo SAITO |
| In this study, a simple and efficient method for detecting and determining the natural sweeteners glycyrrhizinic acid (GA), stevioside (Stev) and rebaudioside A (Reb. A) in foods is described. These sweeteners were extracted with a methanol-0.1% ammonium hydroxide (40:60) mixture using a homogenizer. After centrifugation of the homogenate, a part of the supernatant was diluted with water, added to tetrabutylammonium bromide (TBA), and then the mixture was loaded in to a C18 cartridge (Mega Bond Elut C18). The cartridge was washed with 25 % acetone-water (containing 5 mM TBA) and water, and the sweeteners were eluted by acetonitrile-0.1% (v/v) phospholic acid (80:20). The eluate was analyzed by HPLC equipped with an NH2 column and UV detectors (monitored at 254 nm for GA and at 210 nm for Stev and Reb. A). Recoveries of these sweeteners spiked at 10 or 50 µg/g were 82 - 104% (GA), 80 - 104% (Stev) and 84 -101% (Reb. A) (Relative standard deviations (CV values) : below 5%). The detection limits of GA, Stev and Reb. A were 0.0001 g/kg. We applied this method to 16 commercially available foods with indications of both "licorice extracts (GA is dominant component)" and "stevia extracts (Stev and Reb. A are dominant components) "; the sweeteners were detected at levels from 5.1 to 406.7 µg/g (16 out of the 16) for GA, from 5.4 to 160.7 µg/g (14 out of the 16) for Stev and from 4.2 to 170.2 µg/g (14 out of the 16) for Reb. A. |
| natural sweetener, licorice, glycyrrhizinic acid, stevioside, rebaudioside A, solid-phase extraction, HPLC |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,93-98,2003 |
|
| 19 Determination of Thiodipropionic Acid in Edible Oils and Fats
|
| Mitsuo NAKAZATO, Hiroko MATSUMOTO and Kazuo YASUDA |
| A method for the determination of thiodipropionic acid in edible oils and fats by HPLC and GC/MS was developed. Refined oils and fats, except sesame oil and seasoning oil such as cayenne pepper oil, were dissolved in n-hexane and extracted with acetonitrile-water (3:7). The extracts were separated on a Capcell Pak C18 MG column with a mobile phase of acetonitrile-0.02% H3PO4 (8:92) and thiodipropionic acid was determined with a UV detector (210 nm). Sesame oil and seasoning oil were dissolved in n-hexane and extracted with acetonitrile-water (3:7), and the extracts were then treated with a Mega Bond Elut SAX cartridge and analyzed by HPLC under the above conditions. The thiodipropionic acid in the edible fats and oils was confirmed by means of GC/MS. The recoveries of thiodipropionic acid added to various kinds of edible fats and oils were 92.5–95.4%. The determination limit of thiodipropionic acid was 0.5 µg/g. |
| thiodipropionic acid, edible oil, antioxidant, synergist |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,99-103,2003 |
|
| 20 Simultaneous Determination of Preservatives in Foods Using Dialysis on Extraction Step
|
| Yoko KASUYA, Toshiharu MATSUDA, Mitsuo NAKAZATO and Kazuo YASUDA |
| An analytical method for 10 kinds of preservatives, benzoic acid, sorbic acid, dehydroacetic acid, salicylic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, n-propyl p-hydroxybenzoate, isopropyl p-hydroxybenzoate, n-butyl p-hydroxybenzoate and isobutyl p-hydroxybenzoate in foods was developed. Chopped or pulverized samples were packed into cellulose tubing with a small quantity of methanol-water (8:2) and were dialyzed against methanol-water (8:2) for 24 hours. The dialyzate was passed through a OASIS HLB cartridge, and the cartridge was washed with water and methanol-water (1:1). Preservatives were eluted from the cartridge with methanol. Benzoic acid, sorbic acid, dehydroacetic acid and salicylic acid in the eluate were separated on an Inertsil ODS-80A column with a mobile phase of methanol-acetonitrile-5 mmol/L citrate buffer (pH 4.0) (1:2:7), and detected at 230 nm. Six kinds of esters of p-hydroxybenzoic acid in the eluate were separated on an Inertsil ODS-80A column with a mobile phase of methanol-acetonitrile-5 mmol/L citrate buffer (pH 4.0) (6:2:9), and detected at 254 nm. The recoveries of 10 preservatives from various kinds of foods spiked at 100 µg/g ranged from 71.8–109%. The detection limits of the preservatives were 10 µg/g in the samples. The proposed method was especiallyuseful for analysis of esters of p-hydroxybenzoic acid in foods containing oils and fats. |
| preservative, benzoic acid, sorbic acid, dehydroacetic acid, salicylic acid, esters of p-hydroxybenzoic acid, dialysis, HPLC |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,104-108,2003 |
|
| 21 Analysis of Ginkgolic Acids in Health Foods
|
| Junichi NAKAJIMA, Ichiro YASUDA, Tomoko HAMANO, Hiroko SHIODA, Sutemi SHIGEOKA, Keiko MINOWA, Kiyoko KISHIMOTO, Takako MORIYASU and Misako TAKAHASHI |
| Ginkgolic acids (GA) are the major components in the lipid fraction of the fruit pods of Ginkgo biloba L. These substances are also present in ginkgo leaves, which are widely sold as health foods in Japan for improvement of peripheral or cerebral circulatory disorders as well as vascular and Alzheimer-type dementia. GA are said to be allergenic, so there is a fear of causing health damage by taking ginkgo health foods. According to the regulation of the Commission E in Germany, the GA contents in ginkgo extract that is classified as medicine must be below 5 ppm. To meet this severe level of GA contents, an analytical method using LC-MS has been reported in some literatures. LC-MS is certainly very sensitive and accurate in analyzing GA, but it is too expensive and troublesome for routine work. To solve these problems, we isolated five kinds of GA, GA1–5, and developed a new method for the determination of GA by HPLC-fluorescence detector. With this new method, we made an investigation of the total GA contents in commercial samples, and discussed the quality of ginkgo health foods. |
| Ginkgo biloba L., ginkgolic acids, Ginkgo biloba L. leaf, Ginkgo biloba leaf extract, HPLC-FL, health foods |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,109-114,2003 |
|
| 22 Analytical Method for Styrene Dimers and Trimers in Foods by GC/MS
|
| Jin SUZUKI, Setsuko TABATA, Yuki SADAMASU, Toshiko SHIMOI and Kazuo SAITO |
| An analtycal method for 4 styrene dimers and 6 trimers in foods by GC/MS was developed. Dimers and trimers were extracted with acetone and extracted with n-hexane. The exracts were defatted with acetonitrile saturated with n-hexane and then purified using a Floridil columun. Dimers and trimers were analyzed by GC/MS using Fluorene-d12 as the internal standard. The recoveries of dimers and trimers spiked in samples were over 70%. The limit of quantification was 5 ng/g. |
| styrene dimer, styrene trimer, food, GC / MS |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,115-120,2003 |
|
| 23 Determination of Antioxidants in Plastic Products in Contact with Foodstuffs
|
| Nahoko HANEISHI, Reiko KANEKO, Keiichi FUNAYAMA and Shuzo OGINO |
| A determination method of 10 kinds of antioxidants in plastic products in contact with foodstuffs was developed. Decomposition of antioxidants in the process of concentration by decompression was controlled when more than 10 the times amount of dl-α-tocopherol was added to plastic products. The determination limits of the 10 antioxidants were 2 µg/g. Recoveries of antioxidants when added to a polyethylene product were at over 90%. |
| antioxidant, dl-α-tocopherol, plastic product, decomposition |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,121-125,2003 |
|
| 24 Multiresidue Analysis of Organochlorine and Pyrethroid Pesticides in Foods Using Dual-column GC-ECD
|
| Yukinari TATEISHI, Ichiro TAKANO, Maki KOBAYASHI, Yasuhiro TAMURA, Sanae TOMIZAWA, Naoko KIMURA, Kyoko KITAYAMA, Toshihiro NAGAYAMA and Kunihoro KAMATA |
| A multiresidue analytical method was developed for the determination of 32 kinds of organochlorine, 11 kinds of pyrethroid and 3 kinds of other pesticide residues in foods by dual-column GC-ECD. Pesticides were extracted with acetone: n-hexane (2:3), and crude extract was separated with ethylacetate: n-hexane (1:4). Pesticide eluate was passed through a Florisil mini-column for cleanup and separated to 2 fractions. The first fraction was eluted with 15 mL of dietylether: n-hexane (3:2), and the second fraction was eluted with 10 mL of acetone: n-hexane (1:9). The eluate was subjected to dual-column GC with dual ECD detectors. Recoveries of 46 pesticides from strawberry, tomato and pumpkin determined by GC-ECD were 70–120%. This method was useful for multiresidue analysis of pesticides in foods. |
| pesticide residue, multiresidue analysis, organochlorine pesticide, pyrethroid pesticide, dual-column, solid phase extraction, GC-ECD, vegetables and fruits |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,126-131,2003 |
|
| 25 Case Study on Detection of Dieldrin in Cucumbers Cultivated in Tama Region, Tokyo
|
| Harumi KONDO, Eiko AMAKAWA, Hirosi SATO , Kazuo YASUDA, Kenichi ONUKI, Michiko AKIBA and Kazuaki KANAYA |
| cucumber, pesticide residue, Dieldrin, Endrin,Tama region ,Tokyo |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,132-135,2003 |
|
| 26 A Detection Methods of Recombinant DNA from Processed Foods of Soybean
|
| Kimio MONMA, Fumiko NAKAZATO, Tomoyuki MATSUMOTO, Kazue SATOH, Takashi TOBE, Hisatsugu ICHIKAWA, Takeshi MATSUOKA, Akihiro HINO and Kazuo SAITO |
| genetically modified organism, soybean, processed food, tofu, recombinant DNA, CTAB-extraction, extraction method |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,136-141,2003 |
|
| 27 Microbiological Method for the Detection of Aminoglycoside Antibiotic Residues in Meat
|
| Tomoko KUSANO, Maki KANDA, Yumiko YAMAKI, Akihiko HIRAI and Kunihiro KAMATA |
| aminoglycoside antibiotic residue, meat, microbiological method, classifying and estimating method |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,142-145,2003 |
|
| 28 Radioactive Contamination in Imported Foods (XII)
- Apr. 2002 - Mar. 2003 -
|
| Kimiko KAN, Hirofumi USHIYAMA, Tetsuya SHINDO and Kazuo SAITO |
| Chernobyl reactor accident, radioactive contamination, imported foods, survey, cesium, mushroom, NaI(Tl) scintillation detector |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,146-150,2003 |
|
| 29 The Contents of Cadmium,Copper and Arsenic in Rice Carried into Tokyo (III) - An Analysis of Examination Results from 1999 to 2002 -
|
| Harukichi ONOZUKA, Takashi AMEMIYA, Kazuko MIZUISHI, Yasushi ONO, Koichi ITO and Toshio MAKI |
| rice, pollution, cadmium, copper, arsenic, permissible value, content distribution, agricultural soil pollution |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,151-155,2003 |
|
| 30 Survey of Preservatives in Domestic and Imported Cheese
|
| Miho SAKAMOTO, Kazue TAKEBA, Kenji FUJINUMA and Kunihiro KAMATA |
| A survey of preservatives in domestic and imported cheese was carried out from 1998 to 2003. Cheese from 475 samples marketed in Tokyo were examined. Sorbic acid was detected at a level of 0.01-1.70 g/kg in 7 samples. Dehydroacetic acid was detected at a level of 0.07 g/kg in one sample. The detected levels of these preservatives were within the standards for use in Japan. Propionic acid was detected at a level of 0.1-5.0 g/kg in 39 samples. The detected levels of propionic acid exceeded the standards for use in Japan. Benzoic acid was detected at a level of 1-65 mg/kg in 212 samples. It was speculated that the propionic acid and benzoic acid detected in the cheese were generated in the process of fermentation. Natamycin, which is not allowed for use in Japan, was detected at a level of 2.1-9.5 mg/kg in 8 samples. |
| cheese, preservatives, sorbic acid, dehydroacetic acid, propionic acid, benzoic acid, natamycin |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,156-161,2003 |
|
| 31 New Quinolone Series Antimicrobial Medicine Detected of an Import Broiled Eel
|
| Keiko USHIYAMA, Kyoko IGUSA, Maki KANDA, Tomoko KUSANO and Kunihiro KAMATA |
| antimicrobial medicine, broiled eel, enrofloxacin |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,162-164,2003 |
|
| 32 The Annual Changes of Organochlorine Pesticide Residues in Cow's Milk (1983.4 - 2003.3)
|
| Kenji FUJINUMA, Kazue TAKEBA, Miho SAKAMOTO, Kazuo Saito and Tomoyuki MIYAZAKI |
| cow's milk, organochlorine pesticides, pesticide residues |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,165-170,2003 |
|
| 33 Survey of Organochlorine Pesticide Residues in Meat and Egg
|
| Tsuneo HASHIMOTO, Naoki SAGI, Takeo SASAMOTO, Shozo HORII, Kimitaka TAIRA, Uno TATEYAMA, Hirokazu KAKI, Kunihiro KAMATA and Tomoyuki MIYAZAKI |
| organochlorine pesticides, residues, meat, pork, chicken, egg, endocrine disrupting chemicals, GPC, GC/MS, selected ion monitoring (SIM) |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,171-173,2003 |
|
| 34 Survey of Total Bromide in Existing Food Additives And Ingredients for Health Foods
|
| Kenji IIDA, Keiko HIRATA, Yoko UEMATSU, Kumi SUZUKI, Yosikazu NAITO, Tetsuo SAITO, Katuji FUKAWA and Kunihiro KAMATA |
| Total bromide levels in 129 samples of existing food additives and ingredients for health foods was determined by gas chromatography with an electron capture detector (ECD-GC). The total bromide level in 79 samples out of the 129 existing food additives exceeded 1 µg/g. In particular, total bromide in Mannentake extract and Rakanka extract was 680 and 570 µg/g, respectively. A follow-up examination was carried out on Mannentake extract. Consequently, it was suggested that existing food additives containing bromide above 1 µg/g were mostly manufactured using extraction of water. |
| bromide, existing food additives, ingredients for health foods, GC-ECD |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,174-178,2003 |
|
| 35 Application of the Quick Analytical Method for Pesticide Residues to Natural Food Additives
|
| Teruhiko HAGIWARA, Tetsuko YASUNO, Yoko UEMATSU, Junichiro KABASHIMA, Kumi SUZUKI and Shuzo OGINO |
| natural food additives, pesticide residues, organochlorine pesticides, organophosphorus pesticides quick analytical method for pesticide residues |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,179-182,2003 |
|
| 36 Survey of Pesticide Residues in Imported Crops (Organophosphorus and Organonitrogen Pesticides) - 2002.4 - 2003.3 -
|
| Yasuhiro TAMURA, Ichiro TAKANO, Maki KOBAYASHI, Sanae TOMIZAWA, Naoko KIMURA, Kyoko KITAYAMA, Toshihiro NAGAYAMA and Kunihiro KAMATA |
| Organophosphorus and organonitrogen pesticide residues in 279 imported crops were investigated. In 24 types of crops, residues of 19 organophosphorus pesticides and 3 organonitrogen pesticides were detected. Concentrations of organophosphorus pesticides and organonitrogen pesticides were between a trace and 2.5 ppm in 22 crops and between 0.04 and 0.13 ppm in 3 crops, respectively. Chlorpyrifos in three spinaches produced in China exceeded the maximum limit of the tolerance for pesticide residues of the Japanese Food Sanitation Law. |
| pesticide residues, imported crops, organophosphorus pesticides, organonitrogen pesticides, postharvest application |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,183-188,2003 |
|
| 37 Survey of Pesticide Residues in Imported Crops (Organochlorine, N-Methyl Carbamate and the Other Pesticides ) (2002.4 - 2003. 3)
|
| Naoko KIMURA, Ichiro TAKANO, Maki KOBAYASHI, Yasuhiro TAMURA, Sanae TOMIZAWA, Yukinari TATEISHI, Kyoko KITAYAMA, Toshihiro NAGAYANA and Kunihiro KAMATA |
| Pesticide residues in 279 imported crops on the Tokyo market in the fiscal year 2002 were inve-stigated. As for the organochlorine pesticides, 4 insecticides (Chlorfenapyr, Endosulfans, Dicofol and Total DDT) and 4 fungicides (Captan, Chlorothalonil (TPN), Iprodione and Procymidone) were detected between trace (below 0.01 ppm) and 2.9 ppm. As for the carbamate pesticides, 2 insecticides (Carbaryl (NAC) and Methomyl) were detected between 0.03 and 0.10 ppm. As for the pyrethroid pestcides, 7 insecticides (Halfenprox, Cypermethin, Fenvalerate, etc.) were detected between trace and 0.67 ppm. As for other pe-sticides, 1 insecticide (Bromopropylate), 3 fungicides (Imazalil, 2-Pheylphenol (OPP) and Thiabendazole (TBZ)) and 1 herbicide (2,4-D) were detected between 0.01 ppm and 4.7 ppm. Residues of these pesticid-es were at levels lower than the tolerance for pesticides residues in Japan, the tolerance for pesticide residues in their origin countries, and the CODEX maximum residues limits for pesticides. |
| pesticide redsidues, imported crops, organochlorine pesticides, carbamate pesticides, pyrethroid pesticides, insecticides, fungicides, herbicides, postharvest appliction |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,189-194,2003 |
|
| 38 Survey of Pesticide Residues in Domestic Vegetables and Fruits (2002.4 - 2003.3)
|
| Sanae TOMIZAWA, Ichiro TAKANO, Maki KOBAYASHI, Yasuhiro TAMURA, Yukinari TATEISHI, Naoko KIMURA, Kyoko KITAYAMA, Toshihiro NAGAYAMA and Kunihiro KAMATA |
| Pesticide residues in 106 samples of 26 kinds of domestic vegetables and fruits on the Tokyo market in the fiscal year 2002 were investigated. Ten kinds of organophosphorous, organochlorine, carbamate, organonitrogen, pyrethroid and other pesticides were detected in 13 samples of 10 kinds of domestic vegetables (detection rate: 24%). Their concentrations were between tr. (below 0.01 ppm) and 0.23 ppm. There was a potato with an indication of "organic cultivated" in which fosthiazate exceeded the tolerance for pesticide residues in the Japanese Food Sanitation Law. Twenty-nine kinds of pesticides were detected in 28 samples of 7 kinds of domestic fruits (detection rate: 54%). Their concentrations were between tr. and 1.4 ppm. Residues of these pesticides were at levels lower than the tolerance for pesticide residues in Japan. |
| pesticide residues, domestic crops, vegetables, fruits, organic agricultural product, organophosphorus pesticides, organochlorine pesticides, carbamate pesticides, organonitrogen pesticides, pyrethroid pesticides |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,195-200,2003 |
|
| 39 Survey of Pesticides Residues in Frozen Vegetables Imported from China
|
| Hiroshi SATOH, Eiko AMAKAWA, Harumi KONDO, Yoko AOYAGI, Michiko MIYAKODA, Yoko YAMADA, Tsutomu OGIWARA and Kazuo YASUDA |
| pestcide residue, frozen vegetable imported from China, chlorpyrifos |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,201-203,2003 |
|
| 40 Survey of Non-registered Pesticides in Japanese Pears producted in Tama Area , Tokyo
|
| Hiroshi SATOH, Eiko AMAKAWA, Harumi KONDO, Yoko AOYAGI, Michiko MIYAKODA, Yoko YAMADA, Tsutomu OGIWARA and Kazuo YASUDA |
| pestcide residue, non-registered pesticide, captafol, cyhexatin |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,204-207,2003 |
|
| 41 Survey of Pesticide Residues in Agricultural Products Cultivated in Tama Region in Tokyo - 2001.4 - 2003.3 -
|
| Harumi KONDO, Eiko AMAKAWA, Hiroshi SATO, Yoko AOYAGI, Michiko MIYAKODA, Yoko YAMADA, Tsutomu OGIWARA and Kazuo YASUDA |
| pesticide residue, aguricultural products cultivated in Tama region, organophosphorus pesticide, organochlorine pesticide, carbamate pesticide, pyrethroid pesticide, nitrogen-containing pesticide |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,208-213,2003 |
|
| 42 Outbreaks of Food Poisoning by Chemical and Naturally Occurring Toxicants in Tokyo (XX) - 2002 -
|
| Hirofumi USHIYAMA, Kimiko KAN, Tetsuya SHINDO and Kazuo SAITO |
| chemical food poisoning, ethyl acetate, tetramine, Aconitum L., histamine, benzalkonium chloride, Lampteromyces japonicus, Alocasia odora |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,214-219,2003 |
|
| 43 Case Studies on Complaints against Food - Apr. 2002 - Mar. 2003 -
|
| Nobuo TAGUCHI, Chigusa KOBAYASHI, Hideki OZAWA, Yukiko YAMAJIMA, Setsuko TABATA, Jjn SUZUKI, Yuki SADAMASU, Toshiko SHIMOI, Mitsuo OISHI, Fusako ISHIKAWA, Keisuke KIMURA, Akiko YASUI, Yasuhiro SHIMAMURA, Kazuo NAKAJIMA, Keiko SUZUKI, Hiroyuki MIYAKAWA, Akihiro IBE and Kazuo SAITO |
| food, complaint, foreign substance, bread, starch, blood vessel, paper, scale, glass, bone |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,220-226,2003 |
|
| 44 A Case Study on Complaint about Glazed Adzuki Beans Contaminated by Chlorophenol Compounds
|
| Tsutomu OGIWARA, Harumi KONDO, Michiko MIYAKODA, Yoko YAMADA, Yoko AOYAHGI, Hiroshi SATO, Eiko AMAKAWA, Hiroko MATSUMOTO, Yoko KASUYA Mitsuo NAKAZATO and Kazuo YASUDA |
| glazed adzuki beans, complaint, chlorophenol compounds |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,227-230,2003 |
|
| 45 Some Consumer Complaints Related to Food Products in Tama Area, Tokyo (II)
|
| Yoko KASUYA, Hiroko MATSUMOTO, Toshiharu MATSUDA, Mitsuo NAKAZATO and Kazuo YASUDA |
| food-related complaint, foreign substance, discoloration of food, degeneration of food, pork meat, japanese muffin containing sweet potato jam, cannned black tea drink, solder, egg beater, amino-carbonyl reaction |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,231-234,2003 |
|
| 46 Survey of Amount of Styrene Dimers and Trimers in Instant-noodles Contained in Polystyrene Cups
|
| Reiko KANEKO, Keiichi FUNAYAMA, Nahoko HANEISHI, Yuji WATANABE and Shuzo OGINO |
| styrene dimer, styrene trimer, styrene oligomer, polystyrene, container, migration |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,235-241,2003 |
|
| 47 Nonylphenol and Octylphenol Contents in Plastic Products for Food and Dissolution Tests
|
| Keiichi FUNAYAMA, Reiko KANEKO, Nahoko HANEISHI, Hideto ARAI, Jun KATAOKA, Yoshitada KIMURA, Takaki KOJIMA, Yuji WATANABE and Shuzo OGINO |
| nonylphenol, octylphenol, plastic, content, dissolution test, food |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,242-246,2003 |
|
| 48 Determination of Hinokitiol in Kitchen Ware by HPLC
|
| Kayo HAGINO, Hiroko MATSUMOTO, Narue SAKAMAKI, Mitsuo NAKAZATO and Kazuo YASUDA |
| hinokitiol, natural antimicrobial agent, kitchen ware, bath ware, distillation, photo diode array detecter (PDA), HPLC |
| Ann.Rep.Tokyo Metr.Inst.P.H., 54,247-250,2003 |