Detection of insect fragments in wheat flour by near-infrared spectroscopy
Detection of insect fragments in wheat flour by near-infrared spectroscopy
复制标题
DOI：
10.1016/s0022-474x(02)00021-8
复制
发表时间：
2003-01-01
影响因子：
2.7
通讯作者：
Baker, JE
中科院分区：
文献类型：
--
作者：
Perez-Mendoza, J;Throne, JE;Baker, JE
商业小麦面粉中的昆虫碎片是制粉行业的主要担忧，因为消费者期望零售层面的高质量和健康的产品。因此，美国食品和药物管理局(FDA)已经确定了每50克面粉75个昆虫碎片的缺陷行动水平。磨坊经常测试他们的小麦面粉，以符合这一联邦要求，并向他们的消费者提供健康的面粉。目前检测面粉中碎屑的标准浮选方法价格昂贵，劳动强度大。因此，我们研究了一种快速、近红外光谱(NIRS)方法检测小麦面粉中昆虫碎片的可能性。并与现行标准浮选方法的灵敏度和准确度进行了比较。这两种技术的碎片计数与面粉样品中存在的实际碎片数量显著相关。然而，浮选法比近红外光谱法更灵敏，碎片计数低于FDA缺陷作用水平。使用我们的近红外光谱仪器，我们无法预测样本中的碎片数量是否超过FDA的行动水平。然而，我们能够准确地预测面粉样本是否含有少于或超过130个碎片。尽管目前的近红外光谱仪器无法在FDA的行动水平上检测到昆虫碎片，但这种方法未来应该重新检查，因为近红外光谱技术正在迅速改进。爱思唯尔科学有限公司出版。
Insect fragments in commercial wheat flour are a major concern to the milling industry because consumers expect high quality and wholesome products at the retail level. Thus, the US Food and Drug Administration (FDA) has established a defect action level of 75 insect fragments per 50 g of flour. Millers routinely test their wheat flour to comply with this federal requirement and to deliver sound flour to their consumers. The current standard flotation method for detecting fragments in flour is expensive and labor intensive. Therefore, we examined the possible use of a rapid, near-infrared spectroscopy (NIRS) method for detecting insect fragments in wheat flour. We also compared the sensitivity and accuracy of the NIRS method with that of the current standard flotation method. Fragment counts with both techniques were significantly correlated with the actual number of fragments present in flour samples. However, the flotation method was more sensitive than the NIRS method with fragment counts below the FDA defect action level. We were unable to predict whether the number of fragments in a sample exceeded the FDA action level with our NIRS instrumentation. However, we were able to predict accurately whether flour samples contained less than or more than 130 fragments. Although current NIRS instruments are unable to detect insect fragments at the FDA action level, this method should be re-examined in the future because NIRS technology is rapidly improving. Published by Elsevier Science Ltd.