Test tube assembly for low-temperature quick ashing of organic matter sample

Abstract

The invention relates to a test tube assembly for low-temperature quick ashing of an organic matter sample. The test tube assembly consists of an outer tube, an outer tube sleeve, an inner tube and an inner tube sleeve, wherein a compact sand core with uniform permeability is embedded into the middle lower part of the inner tube; and a gap is reserved at the bottom after the inner tube is inserted into the outer tube. The test tube assembly integrates functions of ashing, cold trapping, dissolving, scaling, homogenizing and the like. The test tube assembly only requires local heating of an area nearby a sample placement area, and is low in energy consumption; the cold trapping can be performed on a volatile element; the test tube assembly can switch between a closed system and an open system according to test condition requirements; all processes are completed in the same vessel; outside pollution and the labor intensity of personnel are reduced; and the accuracy and the precision of the ashing process are improved.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and in particular relates to a test tube assembly for low-temperature rapid ashing of organic matter samples. technical background [0002] The current method for ashing organic samples is to accurately weigh the sample in a crucible, then place the crucible in a muffle furnace, and heat and ash the sample at a set temperature. After the ashing of the sample is completed, transfer the burnt ash to a beaker, add acid to dissolve it, and finally set the volume to a volumetric flask for measurement or subsequent tests. Using this method not only takes a long time for ashing, but also requires a lot of work for the operators, and because the furnace of the muffle furnace is a relatively closed environment, it is difficult for organic samples to come into contact with oxygen in the air during ashing in the muffle furnace, thus causing ash Insufficient. In order to complete ashing, it is necessa...

AI Technical Summary

Problems solved by technology

Using this method not only takes a long time for ashing, but also requires a lot of work for the operators, and because the furnace of the muffle furnace is a relatively closed environment, it is difficult for organic samples to come into contact with oxygen in the air during ashing in the muffle furnace, thus causing ash Insufficient

In order to complete the ashing, it is necessary to increase the heating temperature of the muffle furnace and prolong the ashing time, resulting in the loss of some volatile elements

There will be a lot of tar attached to the top of the furnace in the long-term use of the muffle furnace, which is difficult to clean and easy to contaminate the sample. The transfer of ash between different vessels will increase the system error, easily cause pollution, and affect the final measurement results

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