The Effect of Drying Time on the Weighing of Extraction Thimbles
In this article, we will talk about the effect of drying time at 105℃-110℃ on the weighing of extraction thimbles. In actual smoke and dust monitoring, the wet weight of extraction thimbles increases significantly when the humidity of flue gas is relatively high.
When the extraction thimble is dried at 105℃-110℃ for one hour according to the specifications, and then it will be taken out and put into the dryer and cooled to room temperature and weighed. At this time, the drying degree of extraction thimble before and after sampling is inconsistent, and the results will often give a positive error.
Based on the above situation, standard blank extraction thimbles can be used to eliminate errors and control the accuracy of weighing. The prepared standard blank extraction thimble is slightly wetted with deionized water or distilled water is dried with sampling extraction thimble at 105℃-110℃. And record the experimental data. If the difference between the weighing value of the standard blank extraction thimble before and after is not less or more than 0.0005g, the result is considered reliable. And otherwise, the result is suspicious.
The cellulose extraction thimble is made of high-quality cotton linters with high mechanical strength and good retention efficiency. The standard single-layer cellulose filter cartridge has a wall thickness of about 1 mm (liquid particle size is about 10.0 μm). The double-layer extraction thimble has a wall thickness of approximately 2 mm (liquid particle size of approximately 6.0 μm) and can be used in applications requiring high rejection, high dry and wet strength, and high stiffness.
The high purity of the material helps to ensure the reliability and reproducible behavior of the analysis results. Used in Soxhlet extractors for fat extraction. The fat extraction has good durability and can control the fat content in 0.1% fat and oil. Various sizes are available.
Cellulose Extraction Thimble Soxhlet Extraction Sleeve
Cellulose extraction thimble: It is made of high-quality cellulose long-fiber or cotton-wool fiber. It is made of a highly homogenized mold. It contains no impurities and the product has a uniform pore size. The filter paper tube is called a filter cartridge, which is often used in Soxhlet extraction, rapid solvent extraction or other phase extraction applications are widely used in Soxhlet extractors, which is a safe, convenient and effective method for solid and semi-solid material extraction.
Soxhlet extraction is a widely used technique for the analysis of lipids and other solid-liquid extractions in food and soil materials – often used to analyze fats and pesticide residues in food and soil samples, or in oil cement slurries for the determination of crude oil. Oil content (different from 1PS phase separation paper for determination of oil content in oilfield wastewater).
Use in Soxhlet extractor:
There are siphon tubes and connecting tubes on both sides of the extraction tube, and the joints of each part should be tightly sealed. When extracting, the sample to be tested is placed in a cellulose extraction thimble and placed in an extraction tube.
The extraction bottle is filled with petroleum ether, the extraction bottle is heated, the petroleum ether is vaporized, the connecting tube is raised into the condenser, and the liquid is dripped into the extraction tube to extract the lipid substance in the sample.
The petroleum ether liquid level in the pipe to be extracted reaches a certain height, and the petroleum ether in which the crude fat is dissolved flows into the extraction bottle through the siphon.