Food additives and contaminants最新文献_第2页

Detection of dehydroepiandrosterone and androsterone in a traditional Chinese herbal product. 中药产品中脱氢表雄酮和雄酮的检测。

Food additives and contaminants Pub Date : 2007-12-01 DOI: 10.1080/02652030701422473

Peng Zou, Ping Chen, Sharon Sze-Yin Oh, Kin-Har Kiang, Min-Yong Low

{"title":"Detection of dehydroepiandrosterone and androsterone in a traditional Chinese herbal product.","authors":"Peng Zou, Ping Chen, Sharon Sze-Yin Oh, Kin-Har Kiang, Min-Yong Low","doi":"10.1080/02652030701422473","DOIUrl":"https://doi.org/10.1080/02652030701422473","url":null,"abstract":"Dehydroepiandrosterone (DHEA) and androsterone (ADT) were detected in a traditional Chinese herbal product by gas chromatography-mass spectrometry (GC-MS) and liquid chromatography tandem mass spectrometry (LC-MS/MS). DHEA and ADT were tentatively identified by comparing their electron ionization (EI) mass spectra with those in the GC-MS Wiley database. A multiple reaction monitoring (MRM) scan was performed in LC-MS/MS to confirm the presence of the DHEA and ADT in the herbal product extract. Both the [M + H]+ and the [M + NH4]+ of DHEA and ADT were selected as the precursor ions. DHEA was detected with ion transitions m/z 306.4 --> 271.2, 306.4 --> 253.3, 289.2 --> 270.9, 289.3 --> 253.1 while ADT was detected with ion transitions m/z 308.5 --> 273.6, 308.5 --> 255.3, 291.5 --> 273.5, 291.5 --> 255.2, which confirmed the presence of the two steroid hormones in the herbal product. Limits of detection (LODs) of 0.2 microg ml(-1) for DHEA and 0.3 microg ml(-1) for ADT were found in methanolic standard solutions when [M +NH4]+ of DHEA and ADT were selected as the precursor ions, which allowed the detection of DHEA and ADT at trace level without time-consuming derivatization.","PeriodicalId":12138,"journal":{"name":"Food additives and contaminants","volume":" ","pages":"1326-33"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/02652030701422473","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40959932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Sorption of aroma compounds in PET and PVC during the storage of a strawberry syrup. 草莓糖浆贮存过程中PET和PVC中芳香化合物的吸附。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701361283

V Ducruet, O Vitrac, P Saillard, E Guichard, A Feigenbaum, N Fournier

{"title":"Sorption of aroma compounds in PET and PVC during the storage of a strawberry syrup.","authors":"V Ducruet, O Vitrac, P Saillard, E Guichard, A Feigenbaum, N Fournier","doi":"10.1080/02652030701361283","DOIUrl":"https://doi.org/10.1080/02652030701361283","url":null,"abstract":"The sorption of 14 aroma compounds into PET and PVC was monitored during storage of a strawberry syrup for 1 year. Concentrations in the syrup and in the polymer were determined during storage and compared with previously published results obtained with glass bottles. Apparent partition coefficients between the polymer and the syrup (noted K app) were estimated from experimental kinetics without reaching equilibrium K app values and optimally identified from the kinetic data obtained between 30 and 90 days. They exhibited a similar behaviour for both polymers with values were between 2 x 10(-5) and 2 x 10(-3), 4 x 10(-5) and 3 x 10(-2), respectively, for PET and PVC. The variation of K app values in PET was mainly correlated to the polarity of tested compounds as assessed by their log P values. By contrast, the variations in K app values for PVC were mainly related to their chain lengths. Due to slightly higher partition coefficients and diffusion coefficients in PVC compared with PET, the amount of absorbed aroma was four times higher in PVC than in PET; however, the amount of absorbed aroma compounds was less than 0.1% of the initial amount present into the syrup, except for octyl butanoate. The variation in concentration in the syrup was interpreted as a combination of a degradation process and a transport process into the packaging material. Both effects were particularly noticeable for both PET and unstable aroma compounds.","PeriodicalId":12138,"journal":{"name":"Food additives and contaminants","volume":"24 11","pages":"1306-17"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/02652030701361283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40960374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Public information campaign on aflatoxin contamination of maize grains in market stores in Benin, Ghana and Togo. 关于贝宁、加纳和多哥市场商店中玉米谷物黄曲霉毒素污染的公众宣传活动。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701416558

B James, C Adda, K Cardwell, D Annang, K Hell, S Korie, M Edorh, F Gbeassor, K Nagatey, G Houenou

{"title":"Public information campaign on aflatoxin contamination of maize grains in market stores in Benin, Ghana and Togo.","authors":"B James, C Adda, K Cardwell, D Annang, K Hell, S Korie, M Edorh, F Gbeassor, K Nagatey, G Houenou","doi":"10.1080/02652030701416558","DOIUrl":"https://doi.org/10.1080/02652030701416558","url":null,"abstract":"Rotary International with the International Institute of Tropical Agriculture (IITA) conducted an information campaign from 2000 to 2004 to increase public awareness of aflatoxin in Benin, Ghana and Togo. Key informant interviews with 2416 respondents showed poor baseline knowledge of aflatoxin and its health risks. The campaign included monitoring of aflatoxin contamination in maize grains from market stores in 38 cities and towns. Aflatoxin concentration in contaminated samples ranged from 24 to 117.5 ng g−1 in Benin, from 0.4 to 490.6 ng g−1 in Ghana, and from 0.7 to 108.8 ng g−1 in Togo. The campaign significantly increased public awareness that populations were exposed to high levels of aflatoxin. The number of maize traders who were informed about the toxin increased 10.3 and 3.2 times in Togo and Benin, respectively; at least 33% more traders believed the information in each of Benin and Togo; 11.4 and 28.4% more consumers sorted out and discarded bad grains in Benin and Ghana, respectively. This paper concludes that sustained public education can help reduce aflatoxin contamination.","PeriodicalId":12138,"journal":{"name":"Food additives and contaminants","volume":"24 11","pages":"1283-91"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/02652030701416558","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41034495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 80

Trace analysis of perchlorate anion in selected food products by reverse-phase liquid chromatography-tandem mass spectrometry. 反相液相色谱-串联质谱法分析食品中痕量高氯酸盐阴离子。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701393120

S Tefera, S Ehling, I P Ho

引用次数: 15

Exposure to patulin from consumption of apple-based products. 因食用苹果类产品而接触到感冒素。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701361556

L González-Osnaya, J M Soriano, J C Moltó, J Mañes

引用次数: 61

Assessment of the stability of pesticides during the cryogenic processing of fruits and vegetables. 果蔬深加工过程中农药稳定性的评价。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701317319

R J Fussell, M T Hetmanski, A Colyer, M Caldow, F Smith, D Findlay

{"title":"Assessment of the stability of pesticides during the cryogenic processing of fruits and vegetables.","authors":"R J Fussell, M T Hetmanski, A Colyer, M Caldow, F Smith, D Findlay","doi":"10.1080/02652030701317319","DOIUrl":"https://doi.org/10.1080/02652030701317319","url":null,"abstract":"An evaluation of the stability of pesticides in fruit and vegetables during cryogenic sample processing (comminution of samples in the presence of dry ice) is reported. Pesticides were spiked onto the undamaged surface of individual units of fruit before freezing and comminution. The mean recoveries of pesticides spiked before and after comminution of the sample were compared to determine the relative stability of the individual pesticides during cryogenic sample processing. A stable internal deposition standard (IDS) was used to correct for physical losses and volumetric errors. Mean recovery results together with associated standard errors were obtained using restricted maximum likelihood (REML) analysis. A total of 134 pesticides in four commodities (apples, grapes, lettuce and oranges) were evaluated. The results demonstrated that 120 pesticides were stable (i.e. the mean difference in recovery of pesticides spiked pre- and post-processing was <20%) during cryogenic sample processing. Fourteen pesticides showed some instability or loss (i.e. the mean difference in recovery of pesticides spiked pre- and post-processing was >20%) during cryogenic sample processing: biphenyl, cadusafos, captan, chlorothalonil, dichlorvos, disulfoton, ethoxyquin, etridiazole, heptenophos, malaoxon, phorate, tebuconazole, tecnazene and trifluralin.","PeriodicalId":12138,"journal":{"name":"Food additives and contaminants","volume":"24 11","pages":"1247-56"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/02652030701317319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40960316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Determination of ochratoxin A in grapes of Greek origin by immunoaffinity and high-performance liquid chromatography. 免疫亲和高效液相色谱法测定希腊葡萄中赭曲霉毒素A的含量。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701413852

Konstantinos Meletis, Sofia Meniades-Meimaroglou, Panagiota Markaki

{"title":"Determination of ochratoxin A in grapes of Greek origin by immunoaffinity and high-performance liquid chromatography.","authors":"Konstantinos Meletis, Sofia Meniades-Meimaroglou, Panagiota Markaki","doi":"10.1080/02652030701413852","DOIUrl":"https://doi.org/10.1080/02652030701413852","url":null,"abstract":"A simple analytical method for ochratoxin A (OTA) determination in grapes is described, using aqueous methanolic extraction, an immunoaffinity column clean-up step and high-performance liquid chromatography with fluorescence detection. Mean recovery was 94% (RSD = 4.0%) with a detection limit of 0.4 ng g(-1) and quantification limit of 1.20 ng g(-1). Repeatability (r) and reproducibility (R) were 1.17 and 1.34, respectively. OTA determinations were applied to 50 grape samples (23 different varieties) originating from representative regions of Greece. Results showed the presence of OTA in 86% of samples tested (n = 50). Traces were found in 56% of samples but OTA was not detectable in 14% of samples. Traces were also found in 4% of red, organically grown samples. The most contaminated were three samples of red grapes, two from Central Greece (2.69 and 1.41 ng g(-1)), both table and wine-making grapes. The third sample (1.46 ng g(-1)), originating from the island of Samos, was used only in wine-making. Mean (1.06 ng g(-1)) and median (0.76 ng g(-1)) OTA concentrations in red grapes were slightly higher compared to the mean (0.82 ng g(-1)) and median (0.65 ng g(-1)) concentrations in white grape samples. The study shows that the potential risk for a person of 60 kg ranged from 0.9 to 9 ng kg(-1) bw day(-1) and is dependent on the quantity of grapes consumed daily.","PeriodicalId":12138,"journal":{"name":"Food additives and contaminants","volume":"24 11","pages":"1275-82"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/02652030701413852","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41034497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

FTIR-ATR infrared spectroscopy for the detection of ochratoxin A in dried vine fruit. FTIR-ATR红外光谱法检测葡萄干果中赭曲霉毒素A。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701452108

Andrea C Galvis-Sánchez, Antonio Barros, Ivonne Delgadillo

引用次数: 24

Validation of an analytical method for the determination of carbadox and olaquindox in feedstuff by liquid chromatography coupled to UV and/or diode array detection. 液相色谱耦合紫外和/或二极管阵列检测法测定饲料中卡巴多和喹啉的分析方法的验证。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701405544

G Gizzi, U Vincent, C von Holst, J de Jong, C Genouel

{"title":"Validation of an analytical method for the determination of carbadox and olaquindox in feedstuff by liquid chromatography coupled to UV and/or diode array detection.","authors":"G Gizzi, U Vincent, C von Holst, J de Jong, C Genouel","doi":"10.1080/02652030701405544","DOIUrl":"https://doi.org/10.1080/02652030701405544","url":null,"abstract":"The performance characteristics of an analytical method based on high-performance liquid chromatography (HPLC) for the detection of the banned growth promoters, carbadox and olaquindox, in feedstuff were determined via a collaborative study. The relative standard deviation of repeatability (RSDr) ranged 1.1-5.5% for carbadox and 2.5-6.2% for olaquindox. The relative standard deviation of reproducibility (RSDR) ranged 6.4-10.7% for carbadox and 12.8-20.0% for olaquindox. In all cases, the HORRAT values were equal or below the critical value of 1.5. Moreover, trueness in all cases was between the acceptance limits of 80 and 110%. Consequently, it was concluded that the method is suitable for quantitative evaluation. The method was also qualitatively assessed in terms of correct identification of the target analytes by examination of the UV spectrum when the more specific diode array detector was coupled to HPLC. In all cases, the percentage of correct identifications was >or=94% for olaquindox and carbadox, while the percentage of false negatives was <or=6%, suggesting the extended utilization of the HPLC method from quantitative to confirmatory status with a diode array detector.","PeriodicalId":12138,"journal":{"name":"Food additives and contaminants","volume":"24 11","pages":"1226-35"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/02652030701405544","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40960376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Solid-phase micro-extraction (SPME-GC) and sensors as rapid methods for monitoring lipid oxidation in nuts. 固相微萃取(SPME-GC)和传感器作为快速监测坚果脂质氧化的方法。

Food additives and contaminants Pub Date : 2007-11-01 DOI: 10.1080/02652030701426987

S Pastorelli, L Torri, A Rodriguez, S Valzacchi, S Limbo, C Simoneau

引用次数: 42