共查询到18条相似文献,搜索用时 93 毫秒
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食品中丙烯酰胺含量的分析方法研究 总被引:8,自引:1,他引:8
富含淀粉类食品经高温烹饪会产生较高浓度的丙烯酰胺。丙烯酰胺是一种对人类可能的致癌物质。本文建立了用气相色谱-质谱直接测定食品中丙烯酰胺含量的方法。采用选择离了采集模式,方法的线性范围是0.5~15.5mg/L,线性相关系数为r=0.99943,回收率在94%以上,相对标准偏差小于5.4%,定量检测限25μg/kg。是一种快速、灵敏的测定方法。 相似文献
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丙烯酰胺是一种潜在的致癌因素,产生于淀粉食品焙烤、油炸或烘烤过程中。在2002年,科学家们在瑞典食品管理局首次报道了碳水化合物丰富的食物中,意外发现含有高水平的致癌物质——丙烯酰胺。 相似文献
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面包专用粉试验方法的研究 总被引:2,自引:0,他引:2
烘焙试验是检验面包专用粉操作性能和食用品质最直接、最有效的方法。因此,立足烘焙试验,从面包的制作工艺和品种入手,发现在面包的制作过程中将盐、糖和酵母分别溶解依次加入面粉,对面包的质量及试验结果至关重要。在试验品种方面,主食面包最易区分面包的结构层次;无盖土司最能反映面包的体积和外在质量;圆形面包则可检验面包粉拉力比数的适宜程度,表明面团的耐搅拌、耐醒发及持气能力的大小。 相似文献
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加工条件对油条中丙烯酰胺含量的影响 总被引:1,自引:0,他引:1
油条在油炸温度160~200℃、油炸时间3~5min时,油条可取得最佳感官特征,同时也是丙烯酰胺产生最多的时段。以菜籽油、大豆油、花生油、玉米油作油炸用油,硫酸铝钾作膨松剂,油条中丙烯酰胺的最高含量不超过150μg/kg;而用棕榈油时,丙烯酰胺的最高含量约为250μg/kg。用0.3%的酵母粉作发酵剂,用棕榈油、花生油炸制的油条中丙烯酰胺最高含量分别达到1589.41和953.60μg/kg,是用硫酸铝钾作膨松剂的油条中丙烯酰胺含量的6.29倍和8.13倍。用泡打粉作膨松剂制得的油条,丙烯酰胺含量明显下降,平均约为50μg/kg。以果葡糖浆作甜味剂的油条中丙烯酰胺含量较蔗糖作甜味剂的油条平均增加约10%。因此,油炸温度160~200℃、油炸时间3~5min,以棕榈油作油炸用油,酵母作发酵剂,果葡糖浆作甜味剂可大大增加油炸面制品中丙烯酰胺含量。 相似文献
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N. S. Mohan Kumar Crassina A. Shimray D. Indrani H. K. Manonmani 《Food and Bioprocess Technology》2014,7(3):741-748
Acrylamide, 2-propenamide, has the chemical formula $ \mathrm{CH}2=\mathrm{CH}-\mathrm{CO}-\mathrm{NH}2 $ . It is produced at elevated levels in high temperature fried and baked foods. It has adverse effects on human health and is proven to be neurotoxic, genotoxic, carcinogenic, and toxic to reproductive system. The aim of this paper was to reduce acrylamide formation in bakery products such as sweet bread by enzyme treatment. l-Asparaginase produced from Cladosporium sp. was treated to wheat-based dough at different concentrations (50–300 U). There was no change in the rheological properties of wheat flour and physico-sensory characteristics of bread with l-asparaginase treatment. Moisture, sugars, l-asparagine, acrylamide, and some indicators of Millard reaction (hydroxymethylfurfural (HMF), color, browning) were estimated. With increase in l-asparaginase level the acrylamide formation was reduced. At 300 U, there was 97 % and 73 % reduction of acrylamide formation in the crust and crumb regions of bread, respectively. HMF, a common intermediate product in the Maillard reaction and a genotoxic compound via 5-sulfoxymethylfurfural, also decreased in l-asparaginase-treated bread samples. These results indicated the potential of l-asparaginase enzyme for industrial and domestic applications in reducing harmful Maillard reaction compounds. 相似文献
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研究面包配料中添加甘氨酸和在面团表面涂刷淀粉膜对面包表皮中丙烯酰胺的协同控制作用。甘氨酸对丙烯酰胺的抑制效果非常显著,当甘氨酸的添加量为面粉的0.1%时,对丙烯酰胺的抑制率达到80.5%;当甘氨酸添加量为面粉的3%时,能将丙烯酰胺含量减少到检测限(<1?μg/kg)以下。在对面团进行焙烤前,将面团表面涂刷不同的淀粉膜,能够抑制面包中的丙烯酰胺20%以上;抑制效果由高到低分别为:混合淀粉膜>马铃薯淀粉膜>玉米淀粉膜。将两种方法结合,甘氨酸在低添加量(0.1%)时结合玉米淀粉膜,对丙烯酰胺的抑制率增加到85.1%,同时还能较好地保持面包的外观颜色。甘氨酸与天冬酰胺竞争底物和淀粉膜中限制性前体物质天冬酰胺的大量减少,是面包中丙烯酰胺的生成量显著降低的主要原因。 相似文献
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Seyed Hossein Razavizadegan Jahromi Farideh Tabatabaee Yazdi Mehdi Karimi Seyed Ali Mortazavi Mehdi Ghiafeh Davoodi Amir Pourfarzad Abdollah Hematian Sourki 《Food and Bioprocess Technology》2012,5(6):2381-2391
Glazing is a surface coating method for enhancement of the quality factors of bakery products. This study was intended to investigate the effect of different bakery glazing groups such as natural, polyols, sugars, and hydrocolloids on Barbari flat bread. Some quality attributes of bread such as moisture content, water activity, specific volume and width/height ratio (0 day) and hardness, crumb, and crust moisture (0–12 days) were evaluated. Results showed that vegetable oil treated samples had the lowest water activity and moisture content. Also, xanthan treatment provided the greatest effect on the specific volume of fresh bread, which enhanced it from 3.94 to 5 cm3/g. Vegetable oil, glycerol, dextrose, liquid glucose, and guar treatments had more significant effect on width/height ratio in comparison to nontreated (unglazed) bread. Evaluation of crumb hardness and moisture during 12 days storage implicated water, egg yolk, starch, and propylene glycol treatments were able to diminish the bread staling and these treated samples had the lowest crumb hardness. Crumb moisture of Barbari bread was affected mostly by water and starch treatments at day 12. Finally, our finding approved that using of glazing as a novel method is an effective technique for improvement of overall quality of flat bread and its application is suggested for large-scale production of other bakery products. 相似文献