付文斌 王春兴 孟庆田
摘 要: 牛乳中体细胞含量的快速检测有利于牛乳行业的发展,通过测量荧光的强度反向推出牛乳中体细胞的数目比传统的测量方法更加快捷方便。通对反应环境温度控制模块,试剂加注模块,发光模块,光补偿模块,光电转换模块,光电倍增模块这几个方面的改进,很大程度上提高了牛乳中体细胞含量测量精度。经过计算得到相关系数R为0.981 1,发光值Y和白细胞数X的关系式Y=2.428 5X+10.001,在测量过程上也比传统的测量方法省时省力。在此设计的产品以便携,操作方便,省时省力,价格便宜等优点,具有一定的市场应用价值。
关键字: ATP生物发光; 牛乳体细胞; 白细胞; PMT
中图分类号: TN918?34; TH79 文献标识码: A 文章编号: 1004?373X(2014)12?0110?03
Abstract: Rapid detection of somatic cell content in milk is beneficial to the development of the milk industry. A rapid detection system for somatic cell quantity in milk was designed in this paper. The exprimental results show that the improved detection equipment can improve the measuring accuracy of the somatic cell content in milk much more than that of other market instruments. Since experimental reagents is automatically added, the device simplifies the operation process and is easy to operate. The correlation coefficient R obtained by calculating the experimental data is 0.9811. The relational expression of luminescence value Y and leukocyte number X is Y=2.428 5X+10.001. In the measuring process, the method can save both time and labour much more than those of conventional methods.
Keywords: ATP bioluminescence; milk somatic cell; leukocyte; PMT
牛乳中的体细胞数(Somatic Cell Count,SCC)是指每毫升牛乳中的细胞总数。牛乳中的体细胞主要是白细胞和部分脱落的上皮体细胞。当奶牛受乳腺炎炎性刺激的时候,过量的白细胞就会进入牛乳中,从而牛乳中体细胞数量明显上升,这样就影响了牛乳的品质[1]。传统的体细胞含量检测方法操作繁琐[2]、消耗大量人力物力,普通人员很难操作。本文根据ATP生物发光技术[3],研制了一台专门用于快速测量牛乳中体细胞含量仪器。
1 检测器设计
1.1 检测原理
各种活的体细胞中ATP的含量大致相当,体细胞在体细胞裂解剂的作用下裂解,体细胞内的ATP释放,与荧光素酶发生反应能够产生荧光,通过测量荧光的强度,就可以推算出牛乳中体细胞的含量。
1.2 检测仪器系统结构……p>