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如何控制实验室试验误差
发表时间:2017-01-11     阅读次数:     字体: С

试验工作中应通过重复试验、比对试验、能力验证等方法来抵消试验误差对试验结果的影响,提高试验室工作质量。
Test work should be through repeated test, the method such as than the ability to test and verify to offset test error influence on test results, improve the quality of laboratory work.

  1.重复性是由同一个试验室在基本相同的情况下,用同一样品试验所得试验结果的误差。如水泥抗压强度试验方法的重复性是由同一个试验室,在相同的操作人员,相同的标准砂,较短时间间隔内,用同一样品所得试验结果的误差来定量表达。对于28天抗压强度的测定,一个合格的试验室在上述条件下的重复性以变异系数表示,要求在1%~3%之间。
Repeatability is by the same laboratory in essentially the same circumstances, with the same sample test error of the test results. Such as cement compressive strength test method repeatability is by the same laboratory, in the same operator, the same standard sand, short time interval, the error of the test results with the same sample to quantify. For the determination of the compressive strength, 28 days a qualified laboratory under the condition of the repetitive with the variation coefficient, said demand is between 1% ~ 3%.
  2.试验室内的比对试验是试验室的不同人员,使用相同的仪器设备,用同一样品试验所得试验结果的比较。试验室内的比对试验具有易操作,且利于提高试验人员的检测能力。
2. The comparative test is the difference between the laboratory test indoor, use the same instruments and equipment, with the same samples from the comparison of experimental results. Test indoor comparative test is easy to operate, and to enhance the detection ability of test.
  3.通过试验室间的比对试验可以消除试验室的系统误差,这一误差是重复试验、同一试验室由不同人员操作的比对无法消除的。通过此比对,找出发生偏差的原因,及时纠正与改进因操作、温湿度环境条件及设备因素等引起的各种偏差。
3. Through the comparative test between the laboratory can eliminate the systematic error of the laboratory, the error is repeated trials, operated by the same laboratory by different staff than cannot eliminate. Through this comparison, find out the cause of the deviation, timely correction and improvement for operation, temperature and humidity environment conditions and equipment factors caused by all kinds of deviation.
4.要真正使试验室内部质量得到有效控制,检测能力上一个台阶,在通过比对改进之后,最好参加国家实验室认证认可机构的能力验证试验,只有通过能力验证,才能了解自己在该检测项目中的真实水平,发现问题,采取措施,及早纠正和整改。
4. To really make the laboratory internal quality control, a higher level detection, after compari

 
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