Application of chromaticity coordinates for solution turbidity measurement
Application of chromaticity coordinates for solution turbidity measurement
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DOI：
10.1016/j.measurement.2018.07.081
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发表时间：
2018-12-01
期刊：
影响因子：
5.6
通讯作者：
Wang, Xiaoping
中科院分区：
文献类型：
--
作者：
Wen, Yizhang;Mao, Yuanfang;Wang, Xiaoping
提出了一种基于色度坐标测量的浊度传感新方法。新方法使用透射法测量浊度，但省略了原始光强参考通道。给定溶液的吸光度表示未溶解物质对入射光的吸收和散射，其表示溶液浊度。由于吸收曲线的梯度在较短的波长处增加，并且对于不同的浊度溶液不同，因此溶液的色度坐标随着浊度的变化而移动。实验结果表明，在较宽的浊度值范围内，色度坐标与浊度之间存在良好的线性关系。对于x、y和z色度坐标，线性拟合的斜率分别为0.00037、0.00034和-0.00071/NTU。此外，浊度几乎不受光强度或暗光谱的变化的影响，这允许省略原始光强度参考通道。因此，在长期测量中，没有必要考虑光强度和探测器响应的漂移。该方法适用于有色水样，只要选择合适的色度坐标。此外，利用该方法对真实的水样进行了浊度测量，结果表明了该方法的可行性。(C)2018爱思唯尔有限公司版权所有。
In this paper, we describe a new turbidity sensing method based on the measurement of chromaticity coordinates. The new method measures turbidity using the transmission method, but omits the original light-intensity reference channel. The absorbance of a given solution, which is indicative of the absorption and scattering of the incident light by the undissolved matter, indicates the solution turbidity. Because the gradients of the absorbance curves increase at shorter wavelengths and differ for different turbidity solutions, the chromaticity coordinates of the solution shift with varying turbidity. The experimental results indicate that a good linear relationship exists between the chromaticity coordinates and the turbidity for a wide range of turbidity values. The slopes of the linear fits are 0.00037, 0.00034, and -0.00071/NTU for the x, y, and z chromaticity coordinates, respectively. Further, the turbidity is almost not affected by a change in the light intensity or the dark spectrum, which allows the omission of the original light-intensity reference channel. Therefore, it is not necessary to take into account the shift of light intensity and detector response in long-term measurement. The proposed method is suitable for colored water samples, provided the appropriate chromaticity coordinates are selected. In addition, the turbidity of real water samples is measured using the proposed method, and the results indicate the technique applicability. (C) 2018 Elsevier Ltd. All rights reserved.