影响水质检测仪器浊度检测的四大因素

2020-04-01
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摘要 一般情况下,浊度通常与气候或地表水条件密切相关,因此要想知道湖泊,河流和河流的环境状况是否发生变化,我们可以通过测量水质的浊度来判断。但大家需要明白一点,浊度并不是测量水体中悬浮颗粒的总量,而是测量水体中悬浮颗粒物的透光量或者是折射量。

大家都知道使用水质检测仪器测量自然环境的水质时浊度是最重要的参数之一,但是很多人关于浊度的测量细节并不完全了解,而今天我们就给大家介绍一些关于浊度方面的知识。大家都知道自然环境中的水质很容易受到一些悬浮颗粒物的影响,而这些悬浮的颗粒物可以通过浊度计检测出具体的数据。一般情况下浊度通常与气候或地表水条件密切相关,因此要想知道湖泊,河流和河流的环境状况是否发生变化,我们可以通过测量水质的浊度来判断。但大家需要明白一点,浊度并不是测量水体中悬浮颗粒的总量,而是测量水体中悬浮颗粒物的透光量或者是折射量。


但熟悉浊度的人都知道浊度是一种光学特性,可以用分光光度计来检测,常用的水质检测仪可通过光波的折射光度计来分析水体中固体物质的参数,而水中的悬浮颗粒妨碍透光率经过计算,就能得到准确的水质浊度数据,但只要是测量就会有干扰,而浊度的干扰主要来源于光源的波长范围、水中的气泡以及光线散射的角度等。

现代测量浊度的方法有三种,其中有两种是测量总悬浮固体,最常用的是浊度计和多普勒,这两种的优势在于浊度测量的范围和准确性。 一般通过水质检测仪得到的浊度参数,可以用于水质或水体过滤过程的效率评价。浊度测量是很多行业和应用的重要指标,它不仅直接影响工业生产的产量而且检测造成的制度性因素。

在水质检测过程中每个参数都非常重要,但在实际操作中确相反,有一部水质参数并得不到大家的重视,而浊度就是其中最具有代表性的检测项目。其实作为水的光学特性,浊度是比较难测量的参数之一。想要得到准确的浊度就必须借助专业的水质检测仪,并不是依靠视觉的主观测量。当然浊度在测量时也会受到一些外界因素的干扰,今天给大家介绍一下影响水质浊度检测的4点因素。

1. 水质检测仪检测浊度的过程,就是确定悬浮颗粒在液体介质中的散射光率。而散射取决于粒子的浓度高低和粒子的散光效果。其次粒子的形状和大小:颗粒小于1/10波长的可见光,散射光对称。较大的颗粒(通常直径大于可见光的波长)光散射不对称,所以测量浊度,散射的角度必须考虑。

2. 还有就是光的波长:如上所述散射光的强度依赖于粒子的大小。以及液体颜色的是否会减少光量,这样也会对浊度的参数产生影响。

3. 我们在进行浊度测量方法时,可以参照一个检测范围。比如许多啤酒厂需要检测测液体淡黄颜色水体中含有酵母的颗粒。所以在检测时就要考虑角度以及光源吸收的问题。虽然检测浊度时,水质中一些存在的吸光收物质或者是一些荧光会产生影响。但这种干扰在操作时可以通过其它的比可见光波长的光线(比如<860 nm近红外)最小化。

4. 在线检测水质浊度时气泡同样会出现干扰,对于这种情况我们可以选择一个合适的安装点来降低气泡的干扰。

从以上就是可以影响到浊度测量的因素。因此在使用水质检测仪测定浊度时一定要注意这些干扰问题,保证浊度参数的准确性。

  • 水质检测
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