加工精度对大米矿物元素指纹信息影响研究

Effects of Processing Precision on the Mineral Elements Fingerprint Information in Rice

矿物元素指纹分析技术已逐渐被应用到农产品的产地溯源中,大米中的矿质元素指纹信息的稳定性不仅与环境(地域和年际)密切相关,还受品种和加工精度的影响。研究农产品矿物元素指纹信息在不同加工等级与不同品种间的稳定性,解析品种、加工精度及其交互作用对各元素含量变异的贡献率,筛选出受品种、加工精度影响较小的元素作为产地溯源的指纹信息。可为农产品产地矿物元素指纹溯源技术的应用提供理论参考。本研究以水稻作为模式生物,于2013年收获期在黑龙江同一地市的3个品种的水稻样品,加工成5个不同等级,利用电感耦合等离子体质谱仪(ICP-MS)测定不同等级大米中49种矿物元素的含量。对数据进行单因素方差分析、多因素方差分析。大米中元素Na、Mg、Al、K、Ca、Cr、Mn、Fe、Co、Cu、Zn、Rb、Sr和Ba含量与加工精度密切相关;元素Na、Mg、Al、K、Ca、Cr、Mn、Cu、Zn、Rb和Mo含量与品种密切相关;在今后产地溯源技术筛选溯源指标时应考虑这些元素。

Minerals fingerprinting technology has been widely applied to the geographical traceability of agricultural products. The stability of fingerprinting of minerals in the rice is closed related to environment（ territory and interannual） and influenced by variety and working accuracy The research studyed the stability of mineral elements fingerprint information between different processing levels,different genotypes,which provide a theoretical basis for the application of agricultural produce minerals elements fingerprint traceability technology application. In this study,rice was used as a model organism. Three varieties of rice samples were gathered in the same city in Heilongjiang in2013,then processed according to five different levels. Determinate the content of 48 kinds of mineral elements using inductively coupled plasma mass spectrometry（ ICP- MS）,analyzed the impact of different processing level to fingerprint information of mineral elements in rice combined ANOVA. The content of Na,Mg,Al,K,Ca,Cr,Mn,Fe,Co,Cu,Zn,Rb,Sr,Ba is closely related to the processing precision. The content of Na,Mg,Al,K,Ca,Cr,Mn,Cu,Zn,Rb,Mo is closely related to the varieties. For the presence of different levels of processing of agricultural products,samples should be kept level consistency in sample handling and processing when minerals fingerprinting techniques was applied to traceability indicators screening.