便携式高油酸花生鉴定仪的研制

高油酸花生以其营养价值高、储藏期长等优点深受消费者和加工企业的喜爱。但是，高油酸花生和普通油酸花生并不能直观区分，必须借助仪器检测油酸含量。其中，气相色谱仪和近红外光谱仪是目前最常用的两类仪器，但是体积大、质量重、造价高，而且需要专业实验室和专业人员操作，限制了其在中小型花生生产和加工企业中的应用。本研究基于花生油折光指数与温度（R²=0.999）和油酸含量（R²=0.802）显著负相关的原理，建立了利用折光指数鉴定高油酸花生的数学模型，并研发了一款便携式高油酸花生鉴定仪。利用该仪器检验了30个花生品系是否为高油酸花生，鉴定结果均与其油酸含量化学值相一致，准确率为100%。该仪器的研制填补了快速、低价、便携式高油酸花生检测仪的空白，为促进高油酸花生产业发展提供了一种简便易行的检测设备。

Development of a portable instrument for identifying high oleate peanut

High oleate peanut is increasingly in favor of peanut customers and processing enterprises, due to its high nutritional value and prolonged shelf-life. However, it is hard to visually distinguish high oleate peanut from normal oleate peanut. Currently, identification of high oleate peanut is mainly dependent on gas chromatograph and near infrared spectrometer, which are normally large-sized, heavy and costly in use. As specialized laboratories and professional technician are needed, so that these facilities are less applicable for small peanut production and processing enterprises. Based on the negative correlation between refractive index of peanut oil and temperature (R²=0.999), as well as oleic acid content (R²=0.802), this study established a model of high oleate peanut identification using refractive index and developed a portable instrument for identifying high oleate peanut. Thirty peanut lines were identified by this instrument, and the result for each line was consistent with its oleic acid content from gas chromatograph. The accuracy of this instrument was 100%. The development of this portable instrument filled the blank market of economic and removable apparatus for identifying high oleate peanut. This portable instrument provided not only a quick, cheap and easy way to identify high oleate peanut, but also a technical support for promoting the development of high oleate peanut industry.