Front optical system of a plasma atomic emission spectrometer

Abstract

The invention relates to a front optical path system of a plasma atomic emission spectrometer, which solves the technical problems of complex structure and inconvenient operation of the front optical path system of the spectrometer in the prior art, serious pollution of the window plate during use, large optical signal loss and low detection efficiency. . The invention provides a front optical path system of a plasma atomic emission spectrometer, which is provided with a main pipe and an inlet branch pipe, the main pipe is a hollow straight pipe, and its two ends are respectively provided with a lighting port and an air outlet; the lighting port is provided with a window The daylight opening is closed by a window; one end of the air intake branch pipe is provided with an air inlet, and the other end is fixedly connected with the main pipe, and the air intake branch pipe and the main pipe are arranged in a Y-shaped pipeline; the interface between the air intake branch pipe and the main pipe and the air outlet A plasma excitation area is provided on the main pipe between them, and a plasma excitation device is provided on the outer wall of the plasma excitation area to generate plasma in the plasma excitation area. The invention is widely used in the spectrometer field of analytical instruments.

Description

Technical field [0001] The present invention relates to the field of analytical instruments, and more particularly to a front optical path system of a plasma atomic emission spectrometer. Background technique [0002] The existing plasma atomic emission spectrometer is mainly taken in focusing the light through the lens to the optical fiber, and then transmitted to the spectrometer, such as the way Hou Xiang Lantern (Anal.Chem. 2014, 86, 5220-5224) . However, using lens focus and fiber transmission, on the one hand, the collection efficiency of the signal light will be reduced, and the partial energy is lost, and the optical path structure is more complicated on the other hand, in particular, the fiber is difficult to apply to the portable instrument. There are also a lens according to the prior art to replace the spectrometer with a spectrophotometer, saving the fiber. However, there is a difficult to overcome the defect in the outlet end, and when the solid and other liquid sam...

AI Technical Summary

Problems solved by technology

However, there is an insurmountable defect in light collection at the gas outlet. When detecting solids and other high-concentration liquid samples, the atomized sample gas flow will contain a lot of solid impurities, which will easily contaminate the condenser when it exits with the gas flow.

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