Then the water into the photoelectriccolorimetry seat, instrument by comparing the color depth and ion concentration value.
然后将此水样放入光电比色座内，仪器会通过比较颜色深浅从而得到离子浓度值。
2
On the basis of the relevant theory of colorimetry, a test system is designed for object color appearance measurement and its color-difference evaluation using photoelectric integrating method.