Standard substance for calibrating wavelength in ultraviolet visible region as well as preparation method and application of standard substance

A standard substance and ultraviolet technology, applied in the field of standard substances, can solve problems such as poor absorption peak shape of optical filters, inaccurate control of absorbance, unsatisfactory uncertainty, etc., to save calibration steps, wide wavelength coverage, The effect of low uncertainty

Inactive Publication Date: 2021-07-09
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the wavelength indication error in the ultraviolet-visible region needs to be calibrated by combining the holmium oxide solution / holmium oxide filter and the praseodymium-neodymium filter, but the peak shape of the absorption peak of the filter is not good, and the absorbance cannot be accurately controlled. Uncertainty cannot meet the requirements of high-end UV-Vis spectrophotometers
[0003] CN105911008B discloses a method for measuring the wavelength indication error of an ultraviolet-visible spectrophotometer, which can effectively solve the measurement problem of any wavelength indication error of the ultraviolet-visible spectrophotometer
[0004] Due to the current calibration of UV-Vis spectrophotometers, different filters need to be used in combination, and the calibration effect is not good.

Method used

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  • Standard substance for calibrating wavelength in ultraviolet visible region as well as preparation method and application of standard substance
  • Standard substance for calibrating wavelength in ultraviolet visible region as well as preparation method and application of standard substance
  • Standard substance for calibrating wavelength in ultraviolet visible region as well as preparation method and application of standard substance

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a standard substance for wavelength calibration in the ultraviolet-visible region, and the preparation method is as follows:

[0039] Dissolve 40 g of holmium oxide and 12 g of neodymium oxide in a perchloric acid solution with a mass fraction of 10%, and after complete dissolution, the volume is adjusted to 1 L to obtain the standard substance for wavelength calibration in the ultraviolet-visible region.

Embodiment 2

[0041] The present embodiment provides a standard substance for wavelength calibration in the ultraviolet-visible region, and the preparation method is as follows:

[0042] Dissolve 50 g of holmium oxide and 10 g of neodymium oxide in a perchloric acid solution with a mass fraction of 8%, and after complete dissolution, the volume is adjusted to 1 L to obtain the standard substance for wavelength calibration in the ultraviolet-visible region.

Embodiment 3

[0044] The present embodiment provides a standard substance for wavelength calibration in the ultraviolet-visible region, and the preparation method is as follows:

[0045] Dissolve 30 g of holmium oxide and 14 g of neodymium oxide in a perchloric acid solution with a mass fraction of 12%, and after complete dissolution, the volume is adjusted to 1 L to obtain the standard substance for wavelength calibration in the ultraviolet-visible region.

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Abstract

The invention provides a standard substance for wavelength calibration in an ultraviolet-visible region as well as a preparation method and application of the standard substance. The standard substance for wavelength calibration in the ultraviolet-visible region comprises the following components in parts by weight, 20-80 parts of holmium oxide, 6-24 parts of neodymium oxide and an acid solution. The standard substance for ultraviolet visible region wavelength calibration provided by the invention is wide in application range, wide in wavelength coverage range, narrower in half width of an absorption peak, more accurate in peak positioning and convenient in absorbance adjustment.

Description

technical field [0001] The invention belongs to the field of reference materials, in particular to a reference material for wavelength calibration in the ultraviolet-visible region, a preparation method and application thereof, and in particular to a standard material for wavelength calibration in the ultraviolet-visible region with a wide application range, and a preparation method and application thereof. Background technique [0002] At present, the wavelength indication error in the UV-visible region needs to be calibrated by combining holmium oxide solution / holmium oxide filter and praseodymium neodymium filter, but the peak shape of the absorption peak of the filter is not good, the absorbance cannot be accurately controlled, and Uncertainty cannot meet the requirements of high-end UV-Vis spectrophotometers. [0003] CN105911008B discloses a wavelength indication error measurement method of an ultraviolet-visible spectrophotometer, which can effectively solve the measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N1/28
CPCG01N21/33G01N1/28G01N2201/127G01N2001/2893
Inventor 蒋磊李硕孟娇然徐昊晟丁敏石玮
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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