Method for measuring ultraviolet ray filtering of different liquids through sunshine ultraviolet spectrum

A technology of ultraviolet spectrum and ultraviolet rays, which is applied in the field of measuring ultraviolet rays filtered by different liquids through solar ultraviolet spectroscopy, achieving the effect of high accuracy and low cost

Inactive Publication Date: 2012-04-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for measuring ultraviolet ray filtering of different liquids through sunshine ultraviolet spectrum
  • Method for measuring ultraviolet ray filtering of different liquids through sunshine ultraviolet spectrum
  • Method for measuring ultraviolet ray filtering of different liquids through sunshine ultraviolet spectrum

Examples

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Effect test

Embodiment 1

[0025] Take the distilled water to be tested and put it in a quartz cuvette, set the scanning wavelength range of the ultraviolet spectrometer at 280nm to 400nm, scan and record the ultraviolet spectrum. The shape of the spectrum is very similar to the ultraviolet spectrum of an empty quartz cuvette. In the 305nm-400nm band, its spectral intensity is lower than that of an empty quartz cuvette; the transmittance of its ultraviolet UVA band increases from 30 % gradually rises to about 80%, and its ultraviolet transmittance is the highest among the four liquids.

Embodiment 2

[0027] Take 5g of green tea leaves and brew them with 250ml of 90°C distilled water. After cooling to room temperature, put the tea into a quartz cuvette, set the scanning wavelength range of the ultraviolet spectrometer at 280nm to 400nm, scan and record the ultraviolet spectrum. In the 305nm-400nm band, its spectral intensity is much lower than that of an empty quartz cuvette; its ultraviolet UVA band transmittance gradually decreases from about 20% to less than 5% with the increase of wavelength, especially at 380nm-400nm band, its UV transmittance is the lowest among the four liquids.

Embodiment 3

[0029] Take about 250g (2 pieces) of commercially available corn, put in 250ml of distilled water and boil until boiling, turn off the heat after boiling for 5 minutes, and after cooling to room temperature, put corn water into a quartz cuvette, set the scanning wavelength range of the ultraviolet spectrometer to Set at 280nm ~ 400nm, scan and record the ultraviolet spectrum. In the 305nm-400nm band, its spectral intensity is much lower than that of an empty quartz cuvette; its ultraviolet UVA band transmittance gradually decreases from about 20% to about 5% with the increase of wavelength.

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Abstract

The invention relates to a method for measuring ultraviolet ray filtering of different liquids through sunshine ultraviolet spectrum. The method comprises steps of: (1) using sunshine as a light source, permeating through an empty quartz colorimetric ware and scanning at 280 nm-400 nm and recording an ultraviolet spectrum; (2) using sunshine as a light source, permeating through a quartz colorimetric ware containing a known liquid, scanning at 280 nm-400 nm and recording an ultraviolet spectrum; (3) comparing an ultra violet radiation intensity obtained from step (2) and an ultra violet radiation intensity obtained from step (1) and establishing a corresponding UVA ultraviolet ray transmissivity spectrum; (4) comparing the UVA transmissivity spectrum of the known liquid and determining capability of filtering UVA of the liquid. The invention uses sunlight as an easily available ultraviolet source on the ground, is at low cost and safe, can carry out rapid and efficient detection with high accuracy, and has strong applicability and good application prospect.

Description

technical field [0001] The invention belongs to the detection field of ultraviolet rays filtered by liquids, in particular to a method for measuring ultraviolet rays filtered by different liquids through sunlight ultraviolet spectrum. Background technique [0002] According to GB / T 18830-2009, solar ultraviolet radiation (UVR) refers to electromagnetic radiation with a wavelength of 280nm to 400nm. Among them, solar ultraviolet UVA refers to solar ultraviolet radiation with a wavelength in the range of 315nm to 400nm; solar ultraviolet UVB refers to solar ultraviolet radiation with a wavelength in the range of 280nm to 315nm. [0003] Solar ultraviolet radiation is solar radiation in the 100nm-400nm band. Due to the absorption of atmospheric ozone, the ultraviolet radiation that can reach the ground is only a part of solar ultraviolet radiation, including only UVA and UVB. A large number of studies have shown that excessive ultraviolet radiation is extremely harmful to the ...

Claims

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Application Information

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IPC IPC(8): G01N21/25
Inventor 唐晓亮
Owner DONGHUA UNIV
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