论文部分内容阅读
石油产品色度测定采用常规目视比色法和比色计法，因是直接观察，准确度低，且标准比色液和标准色片不易长期保存和使用，提出了一种新的石油产品色度测定的方法，即分光光度法。该方法通过对２５种标准比色液的吸光度的测定，发现其最大吸收波长不在仪器的可测范围内，为此将其吸光度控制在０２～０８的范围内，选一个适当的波长为入射光波长，配以合适的比色皿，最后绘制出５种不同类型的吸光度色号标准曲线。对实际样品进行测试，相对误差由目视比色法的８％提高到２％左右。
Colorimetric determination of petroleum products using conventional visual colorimetry and colorimeter method, because of direct observation, low accuracy, and standard colorimetric and standard color film is not easy to long-term preservation and use of a new petroleum products Colorimetric method, ie spectrophotometry. The method through the determination of 25 standard colorimetric liquid absorbance and found that the maximum absorption wavelength is not within the measurable range of the instrument, for which the absorbance is controlled in the range of 0 2 ~ 0 8, select an appropriate Wavelength of the incident light wavelength, with a suitable cuvette, and finally draw 5 different types of absorbance color standard curve. The actual samples tested, the relative error by visual colorimetric method increased from 8% to 2%.