What are the advantages and disadvantages of the high-temperature electric furnace ashing method in the processing of samples

The advantages and disadvantages of the high-temperature electric furnace ashing method are that it is easy to operate and suitable for processing and determining a large number of samples without the need to add other unnecessary reagents during the process, which can effectively avoid sample contamination. The disadvantage of this method is that it can easily cause volatilization during the ashing process, resulting in varying degrees of loss of the sample. The tested elements may stick to the wall or remain on acid-soluble ash particles, resulting in loss of the sample. Selenium and mercury are also volatile elements. If the volatilization loss during treatment is severe, it is not recommended to use this method to treat the sample.
According to the condition of the sample, it is necessary to discharge the sample again in the furnace at a low temperature of around 370-590 ℃ to achieve complete ashing of the sample. The furnace temperature and operating time for different ashing of the sample are different. After cooling, the ash is washed out with inorganic acids and diluted with deionized water to a specific volume before being measured by atomic absorption spectrometry.
The high-temperature box electric furnace ashing method uses thermal energy to decompose its organic samples during the treatment process. To make the elements to be tested soluble and accurately weigh 0.5-1.0g, except for the samples that must be pre-treated. Generally, crucible type porcelain crucibles, platinum crucibles or quartz crucibles, are used when placed in matching utensils. The low-temperature carbonization operation is carried out in the box electric furnace furnace furnace until the smoke is almost exhausted.

The above content is organized by Superb heater Company, super heater. Mainly professional production: industrial heating elements, temperature measuring elements, production equipment, accessories, and raw materials such as tubular heaters, tubular heaters, belt heaters, ceramic heaters, silicone rubber heaters, thermocouples, etc.

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