Ultraviolet irradiation device and analysis device having the ultraviolet irradiation device

An irradiation device, ultraviolet technology, applied to the parts of gas discharge lamps, color/spectral characteristic measurement, etc., to achieve the effect of preventing elution

Inactive Publication Date: 2018-02-27
SHIMADZU SEISAKUSHO CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For example, when reagents such as sodium hydroxide are mixed into the water sample, since the luminous tube is immersed in the alkaline water sample, there is a quartz glass that forms the luminous tube due to the chemical reaction shown in the following reaction formula: eluting such problems

Method used

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  • Ultraviolet irradiation device and analysis device having the ultraviolet irradiation device
  • Ultraviolet irradiation device and analysis device having the ultraviolet irradiation device

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Embodiment Construction

[0037] figure 1 It is a schematic diagram showing a configuration example of an analysis device according to an embodiment of the present invention. The analysis device related to this embodiment is a total nitrogen and total phosphorus measuring instrument capable of measuring the total nitrogen concentration (TN concentration) and the total phosphorus concentration (TP concentration) of the water sample. figure 1 Only a part of its composition is shown.

[0038] Water samples are sewage, river water, or factory effluent, and contain various components such as nitrogen compounds and phosphorus compounds. Nitrogen compounds in water samples exist as, for example, nitrate ions, nitrite ions, ammonium ions, and organic nitrogen. When measuring the total nitrogen concentration of a water sample, the concentration is determined after all the nitrogen compounds in the water sample are oxidized to nitrate ions.

[0039] Also, phosphorus compounds in water samples exist as, for ex...

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Abstract

The present invention provides an ultraviolet irradiation device capable of preventing a luminous tube from being affected by an alkaline atmosphere without adversely affecting measurement, and an analysis device provided with the ultraviolet irradiation device. By forming the first protective film (731) on the outer surface of the luminous tube (71) formed of quartz material, the luminous tube (71) is prevented from being affected by the alkaline atmosphere. Since the first protective film (731) can prevent the chemical reaction of the quartz material in the alkaline atmosphere and prevent the quartz material from eluting, the luminous tube (71) can be prevented from being affected by the alkaline atmosphere. Also, since the first protective film (731) is formed on the outer surface of the arc tube (71), it is possible to prevent a gap from occurring between the outer surface of the arc tube (71) and the first protective film (731). Therefore, the water sample entering the gap between the outer surface of the luminous tube and the first protective film does not mix into the water sample for the next analysis, and it is possible to prevent such mixing of the water sample from adversely affecting the measurement.

Description

technical field [0001] The present invention relates to an ultraviolet irradiation device used in an alkaline atmosphere and an analysis device provided with the ultraviolet irradiation device. Background technique [0002] In analysis devices such as total nitrogen and total phosphorus measuring instruments, for example, the components in the water sample can be oxidized by irradiating ultraviolet rays to the water sample, and the concentration of the oxidized component can be measured by the measuring section (for example, refer to the following patent document 1 ). Ultraviolet rays are irradiated to the water sample from an ultraviolet irradiation device such as a low-pressure mercury lamp. The ultraviolet irradiation device is provided with an arc tube made of, for example, quartz glass, and ultraviolet rays generated inside the arc tube are irradiated to the outside through the arc tube. [0003] Among such analyzers, there are analyzers configured to irradiate ultrav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/02G01N21/33
Inventor 并河信宽能登纪幸中森明兴井上武明
Owner SHIMADZU SEISAKUSHO CO LTD
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