作　　者： ; ; ; ; (赵国鹏）; (刘建平）;

机构地区： 广州大学生物与化学工程学院

出　　处： 《材料保护》 2005年第5期72-74,共3页

摘　　要： 为了快速、准确测定出溶液中纳米微粒的含量,提供了一种采用紫外可见分光光度计测定水溶液中纳米粒子含量的测定方法。结果表明,在所研究的4种不同pH值的纳米Al2O3、纳米SiO2体系中均存在空白液吸光度很低,工作液吸光度较高的较宽波长区间,是分光光度分析法中理想的测定体系;所对应的标准曲线相关系数均大于0.98;测定纳米Al2O3、纳米SiO2的平均相对误差分别为2.33%和1.052%,远远小于重量分析法的(分别为20.7%和16.2%),且比重量分析法(2d)省时(1h)。 A method based on an ultravioletvisible spectrophotometer was established to measure the content of nanometer particles in an aqueous solution. The results showed that there existed a wide wavelength range for the nanoparticlecontaining solutions with different pH values, in which the blank solution had a small absorbency while the working solution had a high absorbency, and the linear correlation coefficients of the corresponding standard curves were all above 0.98. Therefore, the nanoparticlecontaining solutions with different pH values were ideal determination systems for the spectrophotometric analysis. Moreover, it cost much less time (1 h) to determine the nanoparticles using the spectrophotometric method than using the gravimetric method ((2 d)). And it was able to determine nanometer Al_2O_3 and SiO_2 at much smaller relative errors using the spectrophotometric method (2.33% and 1.05%, respectively) than using the gravimetric method (20.7% and 16.2%, respectively).

关 键 词： 纳米 分光光度法测定 紫外 纳米 可见分光光度计 分光光度分析法 重量分析法 纳米微粒 准确测定 测定方法 粒子含量 测定体系 相关系数 标准曲线 吸光度 水溶液 值 宽波长 工作液 中理想 区间

领　　域： [理学] [理学] [一般工业技术]