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在临床生化检验工作中,吸取标本和试液都离不开吸量管,其容量是否准确将直接影响实验结果的可靠性。因此吸量管的检定目前已列为临床生化检验质量控制的重要措施之一。常用的检定方法有二种:一是容量比较法,操作简便,适用于大量的产品检定,但要有一套专用的标准量器装置,一般的临床生化实验室缺乏这些设备。二是称量法,系将纯水或水银的密度,通过天平称量及温度校正后再换算成容积。本法设备虽然要求不高,但效率较低。最近我们创用相对比较法,对本科600多支不同规格的吸量管作了检定,同时抽样与称量法作了比较,取得较满意的结果,兹介绍如下。一、检定方法 (一)首先以称量法选择一支标准的1ml吸量管(方法略),然后配制10NH_2SO_4及N/(25)NaOH溶液(酸碱浓度基本准确即可)。
In the clinical biochemical tests, the specimen and test fluid are inseparable from the pipette, the accuracy of its capacity will directly affect the reliability of experimental results. Therefore, the pipette test has now been listed as one of the important measures for the quality control of clinical biochemical tests. Commonly used test methods are two: First, the capacity comparison method, easy to operate, suitable for a large number of product testing, but to have a dedicated standard measuring device, the general lack of clinical biochemical laboratory these devices. The second is weighing method, the Department of pure water or mercury density, weighing and temperature balance by weighing and then converted into volume. Although the requirements of this device is not high, but less efficient. Recently, we have used relative comparative method to test more than 600 different types of pipettes of different specifications in our undergraduate department. At the same time, we compared the sampling with the weighing method to obtain more satisfactory results. First, the test method (A) First weighing method to select a standard 1ml pipette (method omitted), and then preparation of 10NH_2SO_4 and N / (25) NaOH solution (acid-base concentration can be accurate).