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High-capacity quartz combustion tube for oil product analysis

A high-capacity, combustion tube technology, used in chemical analysis by combustion, preparation of samples for testing, etc., can solve the problems of incomplete combustion, small injection volume, troublesome, etc., and achieve the effect of prolonging the combustion time.

Inactive Publication Date: 2014-02-26
江苏东华分析仪器有限公司
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Problems solved by technology

The quartz combustion tubes currently used in the market generally have the problems of short residence time of the sample in the combustion tube and small injection volume. Generally, the injection volume is 10-20 microliters. If the injection volume is slightly larger, it is easy to cause incomplete combustion. Carbon deposits are formed, which will cause optical path pollution, sample chamber pollution, detector pollution, and electrolytic cell pollution. It is very troublesome to deal with. When the carbon deposit is serious, the instrument may even fail to operate and be scrapped directly.
Due to the influence of carbon deposits, the improvement of the injection volume is directly limited, thereby limiting the further improvement of the precision, accuracy, lower detection limit and detection limit of the method when detecting the content of total sulfur, total nitrogen and total chlorine

Method used

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  • High-capacity quartz combustion tube for oil product analysis

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Embodiment Construction

[0014] see figure 1 , the carrier gas inlet 1 at the inlet end of the combustion tube body 13 is connected to the inner end of the injection port 2. The carrier gas is generally high-purity argon or high-purity nitrogen, and the flow rate of the carrier gas is adjusted to 100-150 ml / min. Seal with a silicone gasket. After taking an appropriate amount of sample with a micro-syringe, it is inserted into the sample inlet 2 through a silica gel pad. Under the carrier gas, the sample is preheated in the helical carrier gas preheating tube 5 and then enters the first combustion chamber 3; The inlet 4 and the spiral oxygen preheating pipe 6 enter the first combustion chamber, adjust the oxygen flow to 150-300 ml / min, the oxygen can be preheated to a certain temperature, and the outlet ends of the two preheating pipes are close to the pipe body At the inlet end, the sample can meet the preheated oxygen as soon as it leaves the carrier gas preheating tube 5, and a combustion reaction ...

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Abstract

The invention relates to a high-capacity quartz combustion tube for oil product analysis. The high-capacity quartz combustion tube is characterized by being provided with two combustion chambers, wherein a spiral carrier gas preheating tube and an oxygen preheating tube are arranged inside the first combustion chamber; a spiral combustion-supporting tube is arranged inside the second combustion chamber; the two adjacent combustion chambers are spaced by a partition plate with a through hole; a blowback oxygen inlet is formed at the outlet end of the combustion tube. The quartz combustion tube is mainly used for measuring the contents of total sulfur, total nitrogen and total chlorine in petrochemical products; conventional sample amount of 10-20 microlitres in oil product analysis is prominently improved by 5-10 times so as to be up to 100 microlitres, and carbon deposition is not caused, so that a measurement signal is relatively enhanced, and the low-content total sulfur, total nitrogen total sulfur and total chlorine detection sensitivity is prominently improved; the lower limit of detection is 0.05mg / L, and the detection limit is as low as 0.01mg / L.

Description

technical field [0001] The invention relates to a high-capacity quartz combustion tube for oil product analysis, which is used for the analysis and testing of total sulfur, total nitrogen and total chlorine content in light oil products, and belongs to the technical field of petrochemical analysis. Background technique [0002] During the production, storage, transportation and use of products in the petrochemical industry, the existence of sulfur, chlorine and nitrogen elements in various oil chemicals can cause corrosion of production equipment, catalyst poisoning, poor stability of oil chemicals, and raw chemicals. The detection of sulfur, chlorine and nitrogen in the above-mentioned products has become the most important and common analysis item in the current petrochemical industry. [0003] At present, the determination of total sulfur, total nitrogen and total chlorine content in various petroleum products mainly adopts ultraviolet fluorescence method, chemiluminescen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01N1/44
Inventor 乔涛
Owner 江苏东华分析仪器有限公司
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