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目前医院药房在散剂调配中,用托盘天平称量再以估分法分包为最常用。此法简便易行,但误差很大。我们根据随机抽样检查,发现很难符合中国药典1977年版一部附录中有关“散剂装量差异限度”的规定,究其原因,主要是在称量及分包操作中。未注意到下列一些问题:(1)目前托盘天平的最小感量为0.1g,其称量的相对误差,按公式:
At present, the pharmacy in the hospital in the deployment of powder, weighing scales with a pallet and then sub-sub-evaluation method for the most commonly used. This method is simple and easy, but the error is very big. Based on random sampling, we found that it is difficult to comply with the provisions of the appendix of the 1977 edition of the Chinese Pharmacopoeia on the “limit of variation of powder loading”. The reason is mainly in the weighing and subcontracting operations. The following problems have not been noticed: (1) At present, the minimum sense of pallet balance is 0.1g, the relative error of its weighing, according to the formula: