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A method for measuring wavelength indication error of ultraviolet-visible spectrophotometer

A spectrophotometer and display value error technology, which is applied in the measurement of color/spectral characteristics, analytical materials, instruments, etc., can solve the problems of inability to display value error measurement, and achieve the effect of significant economic and social benefits and high measurement accuracy.

Inactive Publication Date: 2018-09-28
HENAN PROVINCE INST OF METROLOGY +1
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  • Abstract
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Problems solved by technology

[0004] According to the national standard GB / T 26798-2011 and GB / T 26813-2011, the wavelength indication error of the UV-Vis spectrophotometer can only be based on the reference peak wavelength standard value of the test tool, that is, the indication value of a wavelength point every 100 nm Error measurement, but unable to measure the indication error of any wavelength within the range of 200-900 nm of the UV-Vis spectrophotometer

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  • A method for measuring wavelength indication error of ultraviolet-visible spectrophotometer
  • A method for measuring wavelength indication error of ultraviolet-visible spectrophotometer
  • A method for measuring wavelength indication error of ultraviolet-visible spectrophotometer

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Embodiment Construction

[0017] The specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings and specific conditions.

[0018] In concrete implementation, the present invention is realized by the following steps:

[0019] 1) Wavelength calibration of fiber optic spectrometer:

[0020] The fiber optic spectrometer uses the LIBS 2500 plus fiber optic spectrometer produced by Ocean Optics. The fiber optic spectrometer adopts 7-channel parallel connection mode, the wavelength range is 200-900 nm, and the minimum wavelength resolution is 0.01 nm; Hg lamp, Xe lamp, and Ar lamp are respectively used , The Ne lamp is used as a standard light source, and an average of 1 wavelength point is calibrated every 8-12nm, and the wavelength of the fiber optic spectrometer is calibrated to ensure that the wavelength value of the fiber optic spectrometer is effectively restored;

[0021] 2) Install measuring equipment:

[0022] The measuring equipment...

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Abstract

The invention relates to a measuring method for wavelength indication errors of an ultraviolet and visible spectrophotometer to overcome problems in measurement of any wavelength indication error of the ultraviolet and visible spectrophotometer The method comprises the following steps: calibrating the wavelength of a fiber optic spectrometer and allowing light emitted by the ultraviolet and visible spectrophotometer to converge to light guide inlets of a seven branch-in-one optical fiber via reflection by a reflector lens of a 90-DEG corner lighting device and condensation by a convex lens of the 90-DEG corner lighting device and then to be introduced into the fiber optic spectrometer via the seven branch-in-one optical fiber; and adjusting the location of the 90-DEG corner lighting device in a colorimetric ware groove along a longitudinal direction to allow the spectral energy value of the fiber optic spectrometer to be maximized, fixing a hollow connecting rod into a pressing cap by a tightening a screw, and introducing the light emitted by the ultraviolet and visible spectrophotometer via the 90-DEG corner lighting device and the seven branch-in-one optical fiber into the fiber optic spectrometer for measurement, wherein a difference between the wavelength value of ultraviolet and visible spectrophotometer and a wavelength peak value measured by the fiber optic spectrometer is the wavelength indication error. The method provided by the invention is stable and reliable and has high measuring precision.

Description

technical field [0001] The invention relates to quality measurement, in particular to a method for measuring wavelength indication error of an ultraviolet-visible spectrophotometer. Background technique [0002] GB / T 26798-2011 "Single-beam UV-Vis Spectrophotometer" and GB / T 26813-2011 "Double-Beam UV-Vis Spectrophotometer" stipulate that the spectral range of UV-Vis spectrophotometer is 200-900 nm, and the wavelength can be continuous Adjustment, UV-visible spectrophotometer wavelength indication error measurement can use low-pressure quartz mercury lamp, holmium oxide solution, holmium oxide glass, praseodymium neodymium glass and other test tools, the reference wavelength data of the test tools should be traceable. Select a wavelength point every 100 nm within the entire wavelength range of the UV-Vis spectrophotometer, use a low-pressure quartz mercury lamp as the light source, and make the light of the low-pressure quartz mercury lamp shine on the incident slit of the U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33
CPCG01N21/33G01N2201/06106
Inventor 丁峰元朱茜王书升陈亮孙钦密张书伟孙琳王嘉歌
Owner HENAN PROVINCE INST OF METROLOGY
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