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Appts. for analysing reduced inorganic sulfur

A low-valence, inorganic sulfur technology, applied in analytical materials, chemical method analysis, biological material analysis, etc., can solve problems such as corrosion of concrete and steel bases, inability to be measured, and deterioration of aquatic habitat quality.

Inactive Publication Date: 2005-01-12
RISATEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Oxidation of low-valent inorganic sulfur in acidic sulfate soils is a global environmental concern affecting 12 million hectares of agricultural land worldwide, degrading aquatic habitats, and corroding concrete and steel foundations
However, low-valent inorganic sulfur in the non-pyrite form cannot be determined

Method used

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  • Appts. for analysing reduced inorganic sulfur
  • Appts. for analysing reduced inorganic sulfur
  • Appts. for analysing reduced inorganic sulfur

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Experimental program
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Embodiment Construction

[0035] figure 1 with figure 2 The devices shown are all designed to be fully automated and can be made portable so that they can be used in the field.

[0036] figure 1 The device 11 shown in has a movable reaction vessel 12. The operator can put a certain volume or quality of the sample to be tested into the reaction vessel. Alternatively, the device of the present invention may include a built-in balance to measure the quality of the material in the reaction chamber. The reaction vessel 12 is placed in the heating jacket 13 and is equipped with a magnetic stirrer. When in use, the reaction vessel is connected to the inlet pipes 14, 15 and the outlet pipe 16 with an airtight sealing device. Any suitable device can be used for the sealing connection, such as ground glass joints or O-rings.

[0037] The inlet pipe 14 is connected to a chromium powder feeder 17. The inlet pipe 15 is connected to a nitrogen source 18 and storages 19, 20 of acid, water and ethanol by means of an a...

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Abstract

The invention relates to an apparatus for measuring the reduced inorganic sulfur content of a sample. The apparatus has a reaction chamber (12) and means (14) for introducing a reducing agent that can selectively convert the reduced inorganic sulfur of a sample in the reaction chamber (12) to hydrogen sulfide. The reducing agent can be chromous chloride. The apparatus also includes means for measuring the amount of hydrogen sulfide evolved by reaction of the reducing agent with the sample and a detector for detecting when evolution of the hydrogen sulfide has reduced or ceased. The term ''reduced inorganic sulfur'' refers to sulfur in a form that can undergo oxidation and includes mineral sulphides and elemental sulfur.

Description

Technical field [0001] The invention relates to a method and equipment for quantitatively analyzing low-valence inorganic sulfur. Background technique [0002] Sulfur exists in a variety of valence forms in the natural environment, and is usually divided into organic sulfur and inorganic sulfur. The existence of each form of sulfur has its environmental significance. For example, the combustion of organic sulfur and inorganic sulfur will produce sulfur dioxide, and sulfur dioxide is a greenhouse gas and a source of acid rain. Another important environmental issue is that a class of inorganic sulfur materials called low-valence inorganic sulfur have a tendency to produce acids. When materials containing these compounds are mined, excavated, or discharged, they are exposed to atmospheric oxygen, thereby producing acid. [0003] The term "low-valent inorganic sulfur" refers to the form of sulfur that can undergo oxidation reactions, including mineral disul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/00G01N33/00
CPCG01N31/005G01N33/0044Y10T436/184
Inventor 利·艾伯特·叙利旺戴维·默里·麦康奇理查德·布什
Owner RISATEC