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A kind of oxygen bottle combustion sample processing method

A technology of sample processing and oxygen cylinder combustion, which is applied in the preparation of test samples, etc., can solve the problems of high background value of chlorine element and low sample processing capacity

Active Publication Date: 2017-09-29
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of oxygen bottle combustion sample processing method in order to solve the problem of low sample processing capacity and high background value of chlorine element in the existing processing method

Method used

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  • A kind of oxygen bottle combustion sample processing method
  • A kind of oxygen bottle combustion sample processing method
  • A kind of oxygen bottle combustion sample processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Determination of Trace Chlorine in High Purity Polyetheretherketone (PEEK) Samples by Ion Chromatography

[0029] Accurately weigh 50 mg of PEEK sample, and use inorganic alumina fiber cloth (4*4cm 2 ) wrap the sample and hang it on a quartz hook, coat 2mg of n-tetradecane on the surface of the inorganic alumina fiber cloth as an ignition agent, select a 500mL combustion bottle to oxygenate 500mL, add 10mL, 60mmol / L sodium hydroxide in the combustion flask The solution was used as the absorption liquid, and the ignition agent was ignited and quickly transferred to the combustion bottle, sealed and absorbed for 2 hours, and then transferred to the ultra-clean bottle after cooling for ion chromatography measurement. The test results are shown in Table 1:

[0030] Table 1

[0031]

Embodiment 2

[0033] Sample Treatment for Determination of Sulfur in Rice (GBW10010) by Ion Chromatography

[0034] Accurately weigh 100mg of rice (GBW10010) sample, and use inorganic zirconia fiber cloth (5*5cm 2 ) wrap the sample and hang it on a quartz hook, coat 10mg of ethylene glycol on the surface of inorganic zirconia fiber cloth as an ignition agent, select a 1000mL combustion bottle to oxygenate 1000mL, add 20mL, 30mmol / L sodium hydroxide solution in the combustion bottle as Absorb liquid, ignite the igniter and quickly transfer it to a combustion bottle, seal it for absorption for 1 hour, and transfer it to an ultra-clean bottle after cooling for ion chromatography measurement. The test results are shown in Table 2

[0035] Table 2

[0036]

Embodiment 3

[0038] Determination of Phosphorus in Apple (GBW10019) Samples by Ion Chromatography Sample Treatment

[0039] Accurately weigh 200mg of apple (GBW10019) sample, and use inorganic silica fiber cloth (8*8cm 2 ) wrap the sample and hang it on the quartz hook, coat 100mg cyclohexanol on the surface of the inorganic silica fiber cloth as the igniter, choose a 1500mL combustion flask to oxygenate 1500mL, add 50mL, 60mmol / L sodium hydroxide solution in the combustion flask as Absorb the liquid, ignite the igniter and quickly transfer it to the combustion bottle, seal it for absorption for 1.5 hours, and transfer it to an ultra-clean bottle after cooling for ion chromatography measurement. The test results are shown in Table 3:

[0040] table 3

[0041]

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Abstract

The invention provides an oxygen bottle combustion sample processing method, which belongs to the field of sample processing methods. In the method, the sample to be tested is placed on the combustion carrier, and the igniter is coated on the combustion carrier; the combustion bottle is oxygenated, and alkaline absorbing liquid is added into the combustion bottle, and then the igniter is ignited and transferred to the combustion bottle for absorption; the combustion bottle After burning and cooling, transfer the absorbing liquid to an ultra-clean bottle for testing. Compared with the prior art, this method abandons the use of platinum wire, and the cost is greatly reduced; and the extra consumption of the minimum oxygen amount in this method increases the sample processing capacity by one order of magnitude; this method uses a high-purity igniter, making The background value of the most easily contaminated chlorine element is reduced by two orders of magnitude; because the combustion carrier is an inorganic medium and is not consumed, it is especially suitable for the treatment of inflammable samples.

Description

technical field [0001] The invention belongs to the field of sample processing methods, and in particular relates to a sample processing method for oxygen bottle combustion. Background technique [0002] The basic principle and operation process of the commonly used oxygen bottle combustion method for sample processing methods for typical volatile non-metallic elements such as halogens, S, and P in organic solid samples are as follows: solid organic samples are wrapped with filter paper and fixed on a bottle cap. Put it on the platinum wire combustion head, ignite it immediately, and put it into the airtight combustion flask filled with oxygen immediately. At this time, the target analyte elements are burned and decomposed into corresponding hydrides such as HCl or oxides such as SO 2 , and the C, H, O in the matrix components are transformed into CO which does not affect the chromatographic detection 2 and H 2 O, together with the analyte, is absorbed by the alkaline abso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 段太成刘平平
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI