近红外光谱法定量分析白花蛇舌草种子中水分含量
2018-02-13李丹清余驰黄必胜肖艳慧查梦丽曹艳
李丹清 余驰 黄必胜 肖艳慧 查梦丽 曹艳



摘要:应用近红外光谱技术建立白花蛇舌草種子水分含量快速测定的检测方法,用于种植种苗培育和药材储存管理及质量控制。采用干燥加速和加湿加速试验方法处理样品,扩充样品水分分布区间,用烘干法测量水分,然后采用近红外光谱技术结合偏最小二乘法(PLS)建立水分定量分析模型。结果表明,模型的相关系数达到0.991,均方根偏差RMSECV为0.086,内部交叉验证和外部验证中,预测偏差均小于1.0%。建立的白花蛇舌草种子水分定量模型能准确地预测种子中水分的含量,可用于种植种苗培育、药材储存管理及质量控制。
关键词:近红外光谱;白花蛇舌草;水分含量
中图分类号:O65 文献标识码:A
文章编号:0439-8114(2018)22-0128-04
DOI:10.14088/j.cnki.issn0439-8114.2018.22.035 开放科学(资源服务)标识码(OSID):
Abstract: To establish a method for quick determination of moisture content in Oldenlandia diffusa seeds by near infrared spectroscopy,which can be used for planting seedling cultivation and medicine storage management and quality control. The methods of drying and humidifying are used to process samples,which is used to expand the water distribution range of samples and the moisture was measured by the drying method. Near infrared spectroscopy combining partial leastsquares method(PLS) was used to develop the moisture quantitative analysis mode. Results showed that the correlation coefficient of model was 0.991,RMSECV was 0.086,the internal cross validation and the external verification were less than 1.0%. The NIRS model can accurately predict the moisture content in Oldenlandia diffusa seeds,which can be used for planting seedling cultivation、medicine storage management and quality control.
Key words: near infrared spectroscopy; Oldenlandia diffusa; moisture content
白花蛇舌草种子为茜草科植物白花蛇舌草[Oldenlandia diffusa(Willd.) Roxb.]的干燥全草,具有清热解毒、消肿散结、利湿通淋的功效,性微苦、甘、寒,归胃、大肠、小肠经。主治咽喉肿痛,痈肿疮毒,热淋涩痛,毒蛇咬伤[1]。近年来的研究表明白花蛇舌草还具有一定的抗肿瘤活性。李超[2]对治疗恶性肿瘤方剂中解毒类药物的配伍规律进行了研究,表明高频清热解毒类药物中,白花蛇舌草位居第一。白花蛇舌草临床用量的增加,也相应地促进了白花蛇舌草的市场需求,同时也带动了种子栽培技术的发展。而种子的质量是影响白花蛇舌草药材品质的重要指标,在种子的存储和培育过程中,水分含量是决定种子成活率和发芽率的关键因素[3]。……
