测压法和稀释接种法测定BOD_5的比较

Comparison between manometric method and dilution inoculation method to measure BOD_5

介绍仪器测压法原理及测定方法,对测压法的准确度与精密度进行了测试,结果为:准确度相对误差在-6.6%￣7.1%之间,精密度相对偏差在-7.5%￣6.0%之间,均符合国家标准质控要求。通过测压法与稀释接种法对质控样及废水的测试比对,结果表明两种测试方法的相对误差、相对偏差无显著差异,且均符合国家标准质控要求。测压法克服了稀释接种法操作繁琐等缺点,具有测定直接、操作简便等优点,有一定的可用性。

This article introduces the principle of manometric methed and carries on the test townrds the degree of accuracy and sophistication of manometric method. The result is： The comparative error margin is between-6.6% and 7.1% and the comparative deviation of sophistication is between-7.5% and 6.0%. Both of them meet the requirement of our country＇s standard. Through comparison between manometric method and dilution inoculation method, we can see that there is no obvious diference between these two methods in comparative error and deviation, and they also meet the hequirement of our country＇s stundard. The manometric method overcomes the defect of tedious operation used in dilution inoculation method and it has the advantage of direct and easy operation, etc. It has certain availability.