作　　者： ; ; ; (郑淑云）; (邱敏敏）; (陈晓翔）;

机构地区： 黄埔出入境检验检疫局

出　　处： 《理化检验（化学分册）》 2009年第9期1035-1037,共3页

摘　　要： 利用数字光栅近红外漫反射技术快速、简便、穿透能力较强的特点建立复合肥中总磷(五氧化二磷)含量的方法,包括定标、建模、验证和应用试验等。结果表明:(1)检测只需几分钟,而且无需称样和消耗化学试剂。(2)与磷钼酸喹啉重量分析法相比,其定标标准偏差为0.13%,定标相关系数为0.995 9;验证标准偏差为0.15,验证相关系数0.994 8;(3)初步应用该法测定52个复合肥样品,预测标准偏差为0.29%,相关系数为0.985 0,与建模和验证结果相近。 Utilizing the peculiarities of strong penetrating ability of NIR diffuse reflectance, conveniency and rapidity of operation, digital grating-NIR diffuse reflectometry was applied to the determination of total phosphorus （expressed as P2O5 ） in the compound fertilizer, nitrophoska, including testings of standardization, establishment of mathematical model, verification and application. As shown by the experimental results, （1） only few minutes were required for a determination without the necessity of weighing of sample and the consumption of chemical reagents; （2） as compared with the quinoline molybdophosphate gravimetric method, value of standard deviation found in calibration was 0. 13%, with correlation coefficient of 0. 995 9; value of standard deviation obtained in verification was 0. 15% with correlation coefficient of 0. 994 8; （3） in the tentative application of the proposed method to the predictive determination of total phosphours in 52 samples of nitrophoska, the predictive standard deviation found was 0. 29% with correlation coefficient of 0. 985 0, which were very close to the values obtained in calibration and in verification.

关 键 词： 近红外漫反射 数字光栅 复合肥 总磷 五氧化二磷

领　　域： [理学] [理学]