公开(公告)号：US4180327A

公开(公告)日：1979-12-25

申请号：US843790

申请日：1977-10-20

申请人： Yoshio Maeda ,  Koichi Matsumoto ,  Seigo Kamitake

发明人： Yoshio Maeda ,  Koichi Matsumoto ,  Seigo Kamitake

IPC分类号： G01J3/08 ,  G01J3/42

CPC分类号： G01J3/42 ,  G01J3/08

摘要： Monochromatic light emitted from a monochromator is split into two light beams. These light beams are detected by a photodetector and converted into corresponding electric signals after having been transmitted, respectively, through a sample to be analyzed and a reference placed in the respective beam paths. The signal corresponding to the light beam transmitted through the sample and the signal corresponding to the light beam transmitted through the reference are converted into digital signals which are subsequently stored in respective digital storages or memories. The signal corresponding to the light beam transmitted through the reference is compared with a value in a predetermined range. The resultant value is then converted into an analog signal for operating a sensitivity regulator thereby to adjust the sensitivity of the photodetector. Thus, the signal corresponding to the light beam transmitted through the reference (reference light signal) is so controlled as to lie in a predetermined range. From the digital signals stored in the digital memory, ratio between the sample light signal and the reference light signal is arithmetically calculated by a digital processor unit for determining the transmittance of the sample. Since the reference light signal is prevented from significant variation and the calculation of the signal ratio is effected on the basis of digital technique, the measurement accuracy is remarkably enhanced.

摘要翻译： 从单色仪发射的单色光被分成两束光束。 这些光束被光电检测器检测，并且在分别通过要分析的样本和放置在各个光束路径中的参考之后被转换成相应的电信号。 对应于通过样本传输的光束的信号和对应于通过参考的光束的信号被转换成数字信号，随后将其存储在相应的数字存储器或存储器中。 将与通过参考的光束相对应的信号与预定范围内的值进行比较。 然后将所得到的值转换成用于操作灵敏度调节器的模拟信号，从而调节光电检测器的灵敏度。 因此，通过参考（参考光信号）传输的光束对应的信号被控制在预定范围内。 从存储在数字存储器中的数字信号，采样光信号和参考光信号之间的比例由用于确定样品的透射率的数字处理器单元算术计算。 由于参考光信号被防止显着变化，并且基于数字技术来实现信号比的计算，所以测量精度显着提高。

公开(公告)号：US4728189A

公开(公告)日：1988-03-01

申请号：US6170

申请日：1987-01-23

申请人： Konosuke Oishi ,  Koichi Uchino ,  Hideo Yamada ,  Seigo Kamitake ,  Masao Hashimoto

发明人： Konosuke Oishi ,  Koichi Uchino ,  Hideo Yamada ,  Seigo Kamitake ,  Masao Hashimoto

IPC分类号： G01N21/31 ,  G01J3/42 ,  G01N21/74

CPC分类号： G01N21/3103

摘要： An absorption profile indicative of a relation in atomic absorption spectroscopy between the absorbance of a desired element and time has a constant half-width independent of the concentration of the desired element in a sample, and hence the half-width of absorption profile with respect to the desired element can be previously determined from data which is obtained by the measurement of a standard sample. In an atomic absorption spectrophotometer herein disclosed, the half-width of absorption profile is previously determined in the above-mentioned manner, and the true peak value of an absorption profile obtained by measuring a sample which contains the desired element at a high concentration, is calculated using the time width of this absorption profile at a predetermined absorbance and the previously-determined half-width.

摘要翻译： 指示所需元素的吸光度与时间之间的原子吸收光谱中的关系的吸收曲线具有与样品中期望元素的浓度无关的恒定半宽，因此吸收曲线的半宽相对于 可以从通过测量标准样品获得的数据预先确定所需要的元素。 在本文公开的原子吸收分光光度计中，预先按照上述方式确定吸收曲线的半宽度，通过以高浓度测量含有所需元素的样品而获得的吸收曲线的真实峰值为 使用该吸收曲线的时间宽度以预定吸光度和预先确定的半宽度计算。