Filter, return the sample to the flask, and repeat the extraction with an identical volume of water.

The extraction of the water contained in the must may be very simply carried out by azotropic distillation using toluene.

Evaporation of water from a known mass of butter, extraction of the fat with light petroleum and weighing of the residue.

This means the concentrated product obtained by extraction from roasted chicory using only water as the medium of extraction and excluding any process of hydrolysis involving the addition of an acid or a base.

This means the concentrated product obtained by extraction from roasted coffee beans using only water as the medium of extraction and excluding any process of hydrolysis involving the addition of an acid or a base.

Absorb 200 il of undiluted oil in a silica column for liquid-solid extraction (type SEP PAC silica cartridge-waters part. No 51900).

Discard the collected fractions and elute the compounds with 25 ml of a mixture of extraction solvent (3.12) and water, 80 + 20 (V + V).

Place the tube for five minutes in a waterbath (5.1) kept at 60 °C ± 1 °C to facilitate the extraction of the preservatives into the ethanol phase.

Pet foods containing a high content of water may need to be mixed with anhydrous sodium sulfate prior to hydrolysis and extraction as per Procedure B.

Propyl carbamate is added to a sample as an internal standard, the solution is diluted with water and placed in a 50 ml solid phase extraction column.

Weigh accurately to 0,1 mg about 50 mg (CM mg) vanillin (4.5) in a 100 ml volumetric flask, add 25 ml extraction solution (4.4) and make up with water.

The solution/extraction behaviour of polymers in an aqueous medium is determined using the flask method (see A.6 water solubility, flask method) with the modifications described below.

Transfer by decantation the saponification solution quantitatively by rinsing with a total volume of 250 ml water to a 1000 ml separating funnel (4.2.3) or to the extraction apparatus (4.8).

The reference method of measurement to be used for determining HCBD in effluents and waters is gas chromatography with electron-capture detection after extraction by means of an appropriate solvent.

information on the treatment of fish and water samples, including details of preparation, storage, extraction and analytical procedures (and precision) for the test substance and lipid content (if measured).

'(e) adequate ventilation and, where necessary, good steam and water-vapour extraction facilities in order to eliminate as far as possible condensation on surfaces such as walls and ceilings or roof linings;'

The reference method of measurement to be used for determining the presence of HCB in effluents and waters is gas chromatography with electron-capture detection after extraction by means of an appropriate solvent.

Retain 50 ml of sample of must or sulphur dioxide treated must or concentrated must or rectified concentrated must with a view to the possible extraction of the water and the determination of its isotope ratio (D/H)WQ.

Water, to which substances regulating acidity or alkalinity may have been added, other food substances which possess solvent properties and ethanol are authorized as extraction solvent the manufacture of foodstuffs or food ingredients.

there is no deleterious effect on boating, fishing, leisure activities, the extraction of raw materials, desalination, fish and shellfish breeding, on regions of special scientific importance or on other legitimate uses of the waters in question.

The reference method of measurement to be used for determining the presence of trichlorobenzene (TCB) in effluents and the water environment is gas chromatography with electron capture detection after extraction by means of an appropriate solvent.

The reference method of measurement to be used for determining the presence of trichloroethylene (TRI) in effluents and the water environment is gas chromatography with electron capture detection after extraction by means of an appropriate solvent.

The reference method of measurement to be used for determining the presence of perchloroethylene (PER) in effluents and the water environment is gas chromatography with electron capture detection after extraction by means of an appropriate solvent.

The reference method of analysis for determining the concentration of the substances in question in discharges and in waters will be gas chromotography with electron capture detection after extraction by means of an appropriate solvent and purification.

if discharge or dumping produces a deleterious effect on boating, fishing, leisure activities, the extraction of raw materials, desalination, fish and shellfish breeding, on regions of special scientific importance or on other legitimate uses of the waters in question, or

AT THE SAME TIME AS THE DETERMINATION OF THE FAT CONTENT OF THE SAMPLE , CARRY OUT A BLANK DETERMINATION ON 10 ML OF WATER USING THE SAME TYPE OF EXTRACTION APPARATUS , THE SAME REAGENTS IN THE SAME AMOUNTS AND THE SAME PROCEDURE AS DESCRIBED HEREAFTER , EXCLUDING CLAUSE 6.2.2.

injection of water containing substances resulting from the operations for exploration and extraction of hydrocarbons or mining activities, and injection of water for technical reasons, into geological formations from which hydrocarbons or other substances have been extracted or into geological formations which for natural reasons are permanently unsuitable for other purposes.

ACCURATELY WEIGH , TO THE NEAREST 1 MG , DIRECTLY IN , OR BY DIFFERENCE INTO , THE EXTRACTION APPARATUS (5.2) ABOUT 1 G OF WHOLE MILK POWDER OR ABOUT 1.5 G OF PARTLY SKIMMED OR SKIMMED-MILK POWDER. ADD 10 ML WATER AND SHAKE GENTLY UNTIL THE MILK POWDER IS COMPLETELY DISPERSED (HEAT MAY BE NECESSARY FOR SOME SAMPLES).

STIR THE PREPARED SAMPLE AND IMMEDIATELY WEIGH , TO THE NEAREST 1 MG , 2 TO 2.5 G OF THE SAMPLE IF SWEETENED OR 4 TO 5 G OF THE SAMPLE IF UNSWEETENED DIRECTLY IN , OR BY DIFFERENCE INTO , THE EXTRACTION APPARATUS (5.2). ADD WATER TO 10.5 ML AND SHAKE GENTLY WITH SLIGHT WARMING (40 TO 50 C) UNTIL THE PRODUCT IS COMPLETELY DISPERSED.

If normal pre-treatment by extraction with light petroleum and water is applied, correction factors b1 and b2 may generally be ignored, except in the case of unbleached cotton, unbleached flax and unbleached hemp, where the loss due to the pre-treatment is conventionally taken as 4 %, and in the case of polypropylene, where it is taken as 1 %.

The solution/extraction behaviour of polymers in water at 37 °C at pH 2 and pH 9 may be determined in the same way as described for the conduct of the experiment at 20 °C. The pH values can be achieved by the addition of either suitable buffers or appropriate acids or bases such as hydrochloric acid, acetic acid, analytical grade sodium or potassium hydroxide or NH3.

The reference method of measurement to be used for determining the presence of 1,2-dichloroethane in effluents and the water environment is gas chromatography with electron capture detection after extraction by means of an appropriate solvent or gas chromatography following isolation by means of the "purge and trap" process and trapping by using a cryogenically cooled capillary trap.

DNA extraction and purification has to be accomplished by either using conventional procedures(3), ready-to-use kits (based on the principle: solubilisation of the meat sample in lysis buffer which contain surfactants, detergents and proteinase K, application of the solubilised sample to a DNA-binding resin, removal of non-DNA compounds by repeated washing steps, and finally elution of purified DNA in water or low-salt buffer), or extracting the DNA in sodium hydroxide solution.

Extracts obtained by a water method of extraction from roasted coffee, put up in powder form, granulated, in grains, in tablets or in a similar solid form