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Oxygen bottle burning sample treatment method

A technology of sample processing and oxygen bottle combustion, 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: 2015-08-19
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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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 ) to 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, and add 10mL, 60mmol / L sodium hydroxide in the combustion flask The solution was used as the absorption liquid, and the igniter was ignited and quickly transferred to the combustion bottle, sealed and absorbed for 2 hours, and then transferred to the ultra-clean bottle for ion chromatography measurement after cooling. 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 the 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 flask 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. 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 burning sample treatment method, belongs to the field of sample treatment methods. The method comprises the steps of arranging a sample under test on a burning carrier, and coating the burning carrier with an igniting agent; performing oxygenation on a burning bottle, adding alkali absorption liquid into the burning bottle, then igniting the igniting agent and transferring to the inside of the burning bottle for absorbing; after burning of the burning bottle is completed and cooling, transferring the absorption liquid into an ultra-clean bottle to be under test. Compared with the prior art, the method has the advantages that using of platinum wires is given up, so the cost is greatly lowered; the amount of additionally consumed oxygen is minimal, so that the sample treating amount is increased by 1 order of magnitude; the high-purity igniting agent is used, so that the background value of a chlorine element being mostly easy to pollute is lowered by 2 orders of magnitude; the burning carrier is an inorganic medium and is not consumed, so that the method is particularly suitable for treating fire-retardant 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 Applications(China)
IPC IPC(8): G01N1/28
Inventor 段太成刘平平
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI