BS EN ISO 7027-1:2016规定了使用光学浊度计或浊度计的两种定量方法 用于测定水的浊度:浊度法，漫辐射测量程序，适用于低浊度水 （例如饮用水）；浊度法，测量辐射通量衰减的程序，更适用于 高度混浊的水（例如废水或其他混浊的水）。根据第一种方法测量的浊度以浊度单位表示 （台大）。结果通常在<0,05 NTU和400 NTU之间。取决于仪器 在设计上，它也适用于浊度较高的水域。这两种方法在数值上是等价的 单位NTU和formazin散射比浊单位（FNU）。第二种方法测得的浊度用甲嗪衰减单位（FAU）表示，结果如下: 通常在40 FAU到4000 FAU之间。交叉引用:CIE第17ISO 5725号出版物- 1ISO 5725-2ISO 3864-1购买本文件时提供的所有现行修改件均包含在购买本文件中。

BS EN ISO 7027-1:2016 specifies two quantitative methods using optical turbidimeters or nephelometers for the determination of turbidity of water:nephelometry, procedure for measurement of diffuse radiation, applicable to water of low turbidity (for example drinking water);turbidimetry, procedure for measurement of the attenuation of a radiant flux, more applicable to highly turbid waters (for example waste waters or other cloudy waters).Turbidities measured according to the first method are presented as nephelometric turbidity units (NTU). The results typically range between <0,05 NTU and 400 NTU. Depending on the instrument design, it can also be applicable to waters of higher turbidity. There is numerical equivalence of the units NTU and formazin nephelometric unit (FNU).Turbidity measured by the second method is expressed in formazin attenuation units (FAU), results typically range between 40 FAU and 4,000 FAU.Cross References:CIE Publication No. 17ISO 5725-1ISO 5725-2ISO 3864-1All current amendments available at time of purchase are included with the purchase of this document.