| 光电直读光谱仪的优缺点 |
| 添加时间：2020/7/1 15:46:00 浏览次数： |
| 光电直读光谱仪的优点是：分析速度快；准确度高，相对误差约为1%；适用于较宽的波长范围；光电倍增管对信号放大能力强，对强弱不同谱线可用不同的放大倍率，相差可达10000倍，因此它可用同一分析条件对样品中多种含量范围差别很大的元素同时进行分析；线性范围宽，可做高含量分析。缺点为：出射狭缝固定，能分析的元素也固定，也不能利用不同波长的谱线进行分析；受环境影响较大，如温度变化时谱线易漂移，现多采用实验室恒温或仪器的光学系统局部恒温及其他措施；价格昂贵。 photoelectricity The advantages of direct reading spectrometer are: fast analysis speed; high accuracy, relative error of about 1%; suitable for a wide range of wavelengths; photomultiplier tube has strong signal amplification ability, and the difference can reach 10000 times for different spectral lines with different intensities. Therefore, it can be used for the simultaneous analysis of various elements with great difference in content range under the same analytical conditions; linear range It can be used for high content analysis. The disadvantages are: the exit slit is fixed, the elements that can be analyzed are fixed, and the spectral lines of different wavelengths can not be used for analysis; it is greatly affected by the environment, such as the spectral line is easy to drift when the temperature changes, so the laboratory constant temperature or the local constant temperature of the optical system of the instrument and other measures are mostly adopted; the price is expensive. |
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