ether extract formula
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8 Crude Fat (Ether Extract) in Forages
Basic Principles: A dried ground sample is extracted with diethyl ether which dissolves fats oils pigments and other fat soluble substances The ether is then evaporated from the fat solution The resulting residue is weighed and referred to as ether extract or crude fat |
What is ether extract?
Ether extract is a chemical method by which all lipid (fat) soluble compounds are extracted by being dissolved in ether (Figure 1). This technique is of little value in evaluating feed quality except in the cases of comparing feeds with high fat content.
What are ether soluble materials in feed?
Ether-soluble materials in feed include different organic compounds that are soluble in organic solvents. In animal feeds, ether extract may include fats, fatty acid esters, and fat-soluble vitamins and hence are often referred to as crude fat.
How many times can a compound be extracted with diethyl ether?
The extraction is repeated two to three times, or perhaps more times if the compound has a low partition coefficient in the organic solvent. Figure 4.16 shows a diagram of an aqueous solution being extracted twice with diethyl ether.
Ash
Ash is the residue remaining after all the organic nutrients have been burned off or oxidized completely in an oven at 500° to 600° C for two to four hours. Nutritionally, ash values have little importance, although high values may indicate contamination (e.g., soil) or dilution of the feed sample with limestone or salt. Ash values obtained are cum
Crude Fiber
Crude fiber estimates the indigestible fraction of feed or those fractions of the feed that are fermented in the hindgut by microbes. Crude fiber includes different insoluble carbohydrates that are associated with the cell wall of plants and are resistant to the action of digestive enzymes. Crude fiber is made up of plant cell structural components
Nitrogen-Free Extract
The term nitrogen-free extract (NFE) is a misnomer, as there is no nitrogen or extraction process in this procedure. Nitrogen-free extract is not determined analytically in the laboratory, as shown below. NFE supposedly represents the soluble carbohydrates of the feed, such as starch and sugar, and is the difference between the original sample weig
“All Fibers Are Not Created Equal”
Peter J. van Soest (1982) improved methods of crude fiber analyses into the detergent fiber system. The concept behind the detergent fiber system is based on the fermentability or digestibility of fiber. Accordingly, plant cells can be divided into cell walls (which contain hemicellulose, cellulose, and lignin and are less digestible) and cell cont
Ether naming and introduction Organic chemistry Khan Academy
Properties of ethers and crown ethers Organic chemistry Khan Academy
13.2 Synthesis of Ethers Organic Chemistry
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A Study of the Ether Extract of the Materials Estimated as Fat in the
by ether extraction the fat that remaine4 in the acid hydrolysate after the procedure their weight was calculated by formula (2). |
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The Prediction of the Metabolizable Energy Content of Poultry
formulation of poultry diets and the qual- ingredient purchasers and diet formula- ... ether extract +1.1X % starch + % sugar). |
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Evaluation of methods for the quantification of ether extract contents
The objective of this study was to compare the estimates of ether extract The CP and ash recoveries were estimated according to the following equation:. |
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A Method for Determining Total Digestible Nutrients in Grazed Forage
know only the ether extract and organic matter content of the feed and the 100 in formula 1 and the accnracy of this term has been discussed. |
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RECOMMENDED METHODS OF ANALYSIS AND SAMPLING CXS
Gravimetry (ether extraction) AOAC 996.15 and calculation (described in the standard). Gravimetry ... Vitamin D (D3 milk based infant formula). |
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True Metabolizable Energy Values for Poultry of Commercial Diets
The combination "ether extract crude protein |
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Extraction.pdf - Organic Chemistry
Let us consider the extraction of a compound whose solubilities in ether and water are 10 g/100 mL Using this the distribution coefficient equation. |
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8. Crude Fat (Ether Extract) in Forages
15 août 2020 Fat (Crude) or Ether Extract in Animal Feed. (920.29) Official Methods of Analysis. 1990. Association of. Official Analytical Chemists. 15th ... |
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Formulation and Evaluation of Herbal Gel containing Extracts of
containing A. lebbeck Linn. bark extract. The gel formulation was designed by using aqueous ethanolic and petroleum ether extracts in varied concentrations |
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Evaluation of methods for the quantification of ether extract - SciELO
The objective of this study was to compare the estimates of ether extract (EE) The CP and ash recoveries were estimated according to the following equation: |
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A Method for Determining Total Digestible - ScienceDirectcom
factor calculated by the formula: (2) F = M (0 01 + 0 000125 E) where M is the per cent organic matter in the dry matter of the feed and E is the ether extract as |
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Crude Fat Determination in Feed - VELP Scientifica
content by the Randall extraction method Petroleum Ether 40 – 60 °C as solvent The extract percentage calculation is performed by using the following |
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Feed Sampling and Analysis
Ether Extract (EE) - Ether extract is determined by treating the sample with the solvent, ether body weight) can be estimated by the following equation: Intake |
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79 Estimation of ether extracts using Soxtec system - Dairy
Release the cups and dry at 100ºC for 30 minutes • Cool the cups in a desiccator and weigh (W ) Calculate percentage fat/oil according to the formula |
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Estimation of ether extract using Soxhlet apparatus - Dairy
Estimation of ether extract using Soxhlet apparatus Principle The crude fat present in the feed is extracted by petroleum ether using the soxhlet apparatus |
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1 PROXIMATE ANALYSIS OF FEEDSTUFF
The ether extract of a feed represents the fat and oil in the feed Soxhlet formula which becomes N = 14 x NFE is determined by mathematical calculation |
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Organic Matter and Crude Protein Digestibility Predicted from
Better regression equations were found for fescue/ryegrass hybrids High degrees of CPD tion as dry matter (DM), ash, ether extract (EE), crude fibre (CF ) |
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