磁天平测定微量磁性微球

Magnetic balance determination of trace magnetic microspheres

背景:磁天平具有结构紧凑、性能稳定、实验方便等特点,适用于实验室磁性测量的研究。目的:通过磁天平测定微量样品磁化率原理的探讨,建立微量磁性药物样品磁化率测定方法。方法:磁化率是描述磁性药物的重要指标,用磁天平测定磁化率是一种常规的物理方法;样品管通过抗磁校正,用已知磁化率的标准样品与待测样品,在相同温度及磁场下测定进入磁场前后的质量变化,即可求得所测微量样品磁化率。结果及结论:测定值与理论值相比结果相差1.96%∠2%,符合较好。磁天平具有设备简单,操作容易等特点。但所需样品量大。通过磁天平测定微量样品磁化率原理及方法分析,建立微量磁性药物样品磁化率测定方法。为微量样品采用磁天平测定磁性能提供可能。

BACKGROUND：The characteristics of magnetic balance include compact structure,stable performance,convenient experiment and so on,magnetic balance is suitable for the laboratory research of magnetic determination.OBJECTIVE：To establish determination methods for magnetic susceptibility of trace magnetic drug samples,according to the discussion on the magnetic balance determination of trace sample magnetic susceptibility.METHODS：The magnetic susceptibility is an important index of describing the magnetic drugs,magnetic balance determination is a conventional method for magnetic susceptibility.Sample tube was processed into magnetic resistance correction,the standard samples with known magnetic susceptibility and the test sample were determined the weight changes at the same temperature and magnetic field,magnetic susceptibility of the test trace samples was obtained.RESULTS AND CONCLUSION：Compared the determined value with the theoretical value,the difference is 1.96%∠ 2%.Magnetic balance has advantages such as simple equipment and easy operation,but needs a large number of samples.Through the principle and method analysis of magnetic balance determination for magnetic susceptibility of trace magnetic sample,a determination method of trace samples is established,thus providing possibility for determination of trace samples using magnetic balance.