Ether measures crude fat in a Socter extractor.

related topicscrude fat refers to the general term for fat-soluble substances such as fat, free lipid acid, la, phospholipid, sterol and pigment. These substances are generally soluble in ethers, petroleum ethers, benzene and chloroform, etc., insoluble in water or slightly soluble in water. In this experiment, ether was used to extract and determine crude fat in the Soc extractor.Extractor extractorSauer extractor consists of three parts: the extraction bottle, the extraction tube and the condenser. When extracted, wrap the sample to be tested in
filter
and put it in the extraction tube. Add waterless ether to the extraction tube.
heating
extraction bottle, waterless ether gasification, from the connecting tube rose into the condenser, condensed into a liquid drip into the extraction tube, immersed in the sample of lipid substances.
the aqueous ether liquid surface in the tube to be extracted reaches a certain height, and the waterless ether dissolved with coarse fat flows through the rainbow
straw
into the extraction bottle. The waterless ether flowing into the extraction bottle continues to be heated to gasify, rise, condense, drip into the extraction tube, and cycle back and forth until the extraction is complete. This method uses ether to extract the fat in the sample in the Soshi extractor, and then evaporates to remove the ether,
dyring
, weighing, you can get the sample of the percentage of crude fat.,
reagents
and materials waterless ether, peanut kernels II, equipment Soth extractor (50mL); analysis of
balance
;
oven
, electric heating plate, skimmed filter paper, skimmed cotton, tweezers;
beech
., operating method 1. Sample processing put clean peanut kernels in an oven 80 to 100 degrees C baked for 4 hours. After cooling, accurately weigh 2g, put in the research grinding fine, the sample and wipe the research of skimmed cotton with skimmed filter paper wrapped, do not let the sample leak out..2. Thewill be washed in the Soshi extract bottle, dried in the oven at 105 degrees C to constant weight, record weight. Add a waterless ether to the extraction bottle about 1/2 to 2/3 of the bottle volume. Place the sample pack in the extraction tube. After connecting the parts of the extractor, the interface must not leak. Use the electric heat plate to heat it back up for 2 to 4 hours. It is advisable to control the temperature of the electric plate and re-distill 3 to 5 times per hour.
until the ether fluid in the extraction tube is oil-free with filter paper. After extraction, take out the filter paper bag, re-distill once, wash the extraction tube. When the waterless ether liquid surface in the extraction tube approaches the siphon port, pour out the waterless ether. If ether is still in the extraction bottle, continue to distill until the waterless ether in the extraction bottle is completely steamed. Remove the extract bottle, blow the remaining ether out of the airtable cabinet with a hairdryer, and place it in a 105C oven to dry, constant weight, and record the weight., calculate theof crude fat in the sample by pressing the button.: W0: receive bottle weight; W: Receive the bottle weight after extracting the fat to dry. , note that 1. Ether is flammable and explosive, should pay attention to the standard operation. . 2. If the sample to be tested is liquid, a certain volume of sample should be dried on the skimmed filter paper, dried in an oven from 60 to 80 degrees C, put into the extraction tube.
.