High-precision spectrophotometer

Abstract

The invention discloses a high-precision spectrophotometer and relates to the field of chemical analysis. According to the technical scheme, the high-precision spectrophotometer is characterized by comprising a housing, a light source arranged in the housing, a colorimetric rack, and a detector; a partition that divides the colorimetric rack and the light source is arranged in the housing; the partition is provided with a light hole that allows passing of a light path; a sliding rack is slidably arranged on one side, opposite to the colorimetric rack, of the partition in the housing; a plurality of monochromators are arranged on the sliding rack and can slide along the sliding rack to close the light hole. The sliding rack and the multiple monochromators are provided, the monochromators that are damped are convenient to switch, and therefore, the influence upon detection precision is relieved; the monochromators rarely abrade during switching at the premise that the monochromators reliably abut to the light hole; a specimen rarely splashes into the housing or to the outer wall of a colorimetric cell; the high-precision spectrophotometer is applicable to the measurement of ammonia nitrogen content in water.

Description

technical field [0001] The invention relates to the field of chemical analysis, in particular to a high-precision spectrophotometer. Background technique [0002] The principle of the visible spectrophotometer is that the ultraviolet-visible absorption spectrum of a molecule is the absorption spectrum generated by the electronic energy level transition after certain groups in the molecule absorb the ultraviolet-visible radiation. Since various substances have different molecules, atoms and different molecular space structures, their absorption of light energy will not be the same. Therefore, each substance has its own unique and fixed absorption spectrum curve, which can be determined according to the absorption The absorbance at certain characteristic wavelengths on the spectrum can be used to judge or determine the content of the substance, which is the basis of spectrophotometric qualitative and quantitative analysis. [0003] The Chinese utility model patent with the ex...

AI Technical Summary

Problems solved by technology

[0004] The monochromator is equipped with a transparent monochromator. Since the sample in the working chamber is generally an aqueous solution, if the sample is placed in the photometer for a long time, or if water spills out of the cuvette, the monochromator is prone to moisture. Problem, the wet monochromator will affect the detection accuracy of the photometer

Images