乌鲁木齐市售大米几项品质指标的初步分析

Preliminary analysis on the quality index of rice sold in Urumqi market

中文关键词:  微量元素  红外光谱  大米  品质

英文关键词:trace element  infrared spectroscopy  rice  quality

中文摘要:

      目的 了解乌鲁木齐市售大米的品质状况，为市民购买大米提供参考依据。方法 在市场调研基础上，选取乌鲁木齐市市售的不同产地、等级的15种代表性大米, 通过原子吸收分光光度法(atomic absorption spectrometry, AAS)和近红外光谱法(near-infrared spectroscopy), 检测大米的微量元素、蛋白质、脂肪、糖类等营养成分含量, 对乌鲁木齐市场销售大米的品质进行初步研究; 结果 乌鲁木齐市场销售大米产地以东北和新疆为主; 市场销售的东北一级大米价格比二级大米贵1.16 元/kg, 但其微量元素总含量差异不大, 其他指标无显著差异; 泰国香米微量元素含量、蛋白质、含糖量均高于新疆地产大米, 但泰国香米的价格大约是新疆大米的4倍。因此, 从性价比上考虑应该首选新疆地产大米。结论 总体来看, 新疆地产大米品质略低于东北产大米, 但其具备价格优势。

英文摘要:

      Objective To study the status of quality of rice sold in Urumqi and then to provide reference for the public. Methods On the basis of market research, 15 kinds of different origins and levels of typical rice were selected, which were sold in Urumqi market. The nutrient content of trace element, protein, fat, car-bohydrates and others in rice were determined by atomic absorption spectrometry and near-infrared spectroscopy. Results The results showed that in Urumqi market, origins of rice were mainly from northeast of China and Xinjiang, price of the first class rice from northeast of China was more expensive than that of the second class rice by 1.16 yuan/kg, but there was no obvious difference in total content of trace elements and other indicators with 2 kinds of northeast rice. The content of trace elements, protein and sugar in Thailand rice were higher than that of Xinjiang, but the price of Thailand rice was about 4 times than Xinjiang rice. Therefore, Consumers should choose Xinjiang rice firstly from the point of cost performance. Conclusion On the whole, the quality of Xinjiang rice is slightly lower than that of rice from northeast of China, but it has a price advantage.