After a time this mixture is to be filtered, and the filtrate well washed with boiling distilled water, and the filtered fluid subjected to evaporation.
The acetate may be dissolved out of the mass in dilute alcohol (it is not soluble in ether), again filtered, the filtrate being finally evaporated to dryness and tested.
The vapor generated from the filtrate contained in the flask passes through the coil in the cooler, as shown in the illustration.
This clear filtrateis placed in a beaker and heated in a water bath to the boiling point.
In lieu of a cooler as shown, one can be constructed by leading the tube of the filtrate flask into a somewhat wider and longer glass tube, which is connected with a second bottle.
Place the clear filtrate in an evaporating dish and drive off the moisture by placing the dish in a steam bath.
When all connections have been made tight, heat the filtrate over an alcohol lamp to a boiling point, the flask having been placed on a piece of wire gauze to equalize the heat.
Place the clear filtrate in a clean flask, stop it with a perforated rubber cork, and connect it by means of a bent glass tube with a cooling apparatus.
The filtrate is to be preserved in a well-stopped bottle.
Alcoholic extract of Cocculus indicus is exhausted with the smallest possible quantity of water, and the mixed liquors filtered; to the filtrate hydrochloric acid is added, and the whole set aside to crystallise.
The filtrate from the precipitate produced by the carbonic acid is, after the addition of 15 c.
This alcoholicfiltrate is then distilled, or evaporated on a water bath, to about 1000 gr.
Cool the liquid, filter, neutralise the filtrate with carbonate of sodium, and again filter.
This filtrate is freed from alcohol by evaporation over a water bath, the approximate quantity of a solution of caustic soda then added, and the whole shaken up with ether.
The several washings are collected and precipitated with basic lead acetate, the precipitate filtered off, and the lead in the filtrateremoved by sulphureted hydrogen.
The precipitates are filtered off, and the filtrate concentrated; nerianthin, after a while, separates in light flocks, and the filtrate from this contains some of the other products.
A very convenient method, applicable in many cases, is to throw out the silver by hydrochloric acid, alkalise the filtrate by bicarbonate of soda, and titrate with iodine solution.
If all the silver is precipitated by hydrochloric acid, carefully filtered off, and the filtrate evaporated to dryness, any residue will denote adulteration or impurity.
The filtrate is distilled alcohol-free, or nearly so, but a small amount of alcohol remaining is not objectionable.
The filtrate containing, it may be, nitrates of lead, copper and cadmium is evaporated nearly to dryness and taken up in a very little water.
In the majority of cases there is not even a true precipitation, for on throwing the milky-looking mixture upon a filter, I found that almost nothing remained behind, and the filtrate was nearly as white as the original liquid.
Filter, and to the clean filtrate add a few drops of perchloride of iron, devoid of free acid.
The filtrate is evaporated to dryness, decomposed with hydrochloric acid, washed with water, and then extracted with alcohol.
In this manner a precipitate consisting of a silica, together with some unburnt carbon, is left on the filter, whilst the filtratecontains the phosphates.
Meanwhile the acidity of the aqueous filtrate and washings is estimated by decinormal soda solution.
The liquid is poured on a small dry filter and washed with warm benzoline, the filtratebeing collected in a small wide beaker.
Several successive portions should be taken, the whole passed through a filter, the filter well washed with ether, and the filtrate evaporated to dryness and weighed.
Evaporate the filtrate by a water bath to the consistence of a thin syrup; then add to it the green colouring matter previously separated, and stirring the whole together assiduously, evaporate at a temperature not exceeding 140 deg.
The filtrate from the ash from 200 grams of dried Astragalus mollissimus, from Imperial, Nebr.
A similar extract from 250 grams of the same dried plants on boiling gave a heavy precipitate, but this precipitate was inactive, while the filtrate killed a rabbit in four hours.
At times in passing H{2}S into active solutions of the ashed plant freed from the acetic acid by evaporation the filtrateand likewise the precipitate were inactive.
The writer then boiled the extract three minutes and as the filtrate was still found active and the proteid precipitate inactive became convinced of the inorganic nature of the active constituents, and finally incinerated the plant.
If the filtrate is cloudy, filter through a porcelain filter candle.
The cultivation should then be filtered through a Berkefeld filter candle previous to step 2, and the filtrate employed in the titration.
Test the filtrate for reducing sugar as in the preceding section.
Add the filtratedrop by drop until, if necessary, a quantity has been added equal in amount to the Fehling's solution employed, keeping the mixture at the boiling-point during the process.
Even when it has become turbid, if simple filtration is sufficient to render it clear, the filtrate may be used again.
Saturate the rest of the filtrate with ammonium sulphate.
Place the filtrate in a flask, add an equal quantity of distilled water, and heat in the steam steriliser for sixty minutes.
Filter and divide the filtrate into three parts a, b and c.
To the filtrate (or, if no silver is present, to the diluted nitric acid solution) 10 cc.
I did not fail to observe that the rains which previously descended through these steep channels, would in future be kept back to filtrate through the scoriae, without ever reaching the new channel.
It was in this final clear filtrate that the product assumed to cause the instability of the original nitrate would be present.
The filtratefrom these precipitates containing only fractional residues of acetone still shows opalescence.
This was demonstrated by grinding up in salt solution, insects which had fed on poliomyelitic animals and injecting the filtrate into a healthy monkey.
The filtrate and the wash-water were then united, well mixed and, if necessary, cleared by centrifuging or by exposure to cold.
If cobalt is present we treat this filtrate with nitrite of potassa, etc.
The filtrate from this last is directly treated with chlorine.
The filtrate is treated with bicarbonate of soda, and titrated with chameleon solution in the way described above.
In order to demonstrate the presence of benzoic acid Herr Convert boiled the crystals with water and silver oxide and dried the scales that separated from the cooling filtrate over sulphuric acid.
The liquid that had passed over was neutralized with barium carbonate, and the filtrate concentrated, when it yielded crystals, which were recognized as nearly pure acetate.
The filtrate from the BaCO{3} evaporated to a small volume deposited yellow crystals resembling the original substance but in shorter and thicker prisms.
The vessels which contain the initial filtrate should !
To thefiltrate from the insoluble residue add ammonium hydroxide until the solution just smells distinctly of ammonia, but do not add an excess.
The filtrate from the silica is then added to the main filtrate from the insoluble residue.
Cool the filtrate to approximately the standard temperature of the laboratory, and transfer it to a 250 cc.
Transfer the filtrate to a liter bottle and mix thoroughly (Note 2).
Acidify the filtrate with hydrochloric acid until just acid, bring to boiling, and slowly add hot barium chloride solution, as in the preceding determination.
Acidify the filtrate from the iron determination with dilute nitric acid.
Two hundred cubic centimeters of thisfiltrate require 29.
This acid is nearly white, and its deposition in the filtrate on long standing should not be mistaken for a second precipitation of the yellow precipitate.
Wash the filter five times with hot water, add to the filtrate ammonium hydroxide and bromine water as described above, and repeat the precipitation.
When the filtrate is received in a beaker, the stem of the funnel should touch the side of the receiving vessel to avoid loss by spattering.
Remove and discard the filtrate and place an Erlenmeyer flask under the funnel.
This must now be filtered again, and carbonate of potassa added to the filtrate as long as a precipitate is produced.
Melt the materials together, pound up the cooled mass, dissolve in hot water, filter, add to the filtrate hydrochloric acid, and evaporate to dryness.
Then pulverize and dissolve in hydrochloric acid to separate the silica; evaporate to dryness, dissolve the residue in water, with the admixture of a little alcohol, and test the filtrate with chloride of platinum for potassa.
The filtrate is now ready for use, and should be kept in a bottle with a glass stopper.
Lead acetate was added to the filtrate to precipitate protocatechuic acid, while phloroglucinol remained in the filtrate from this precipitate.
Examination showed that everything had been removed by the bone-black and the filtrate was apparently pure alcohol and water.
The presence of free rhamnose has thus been shown in the original material, in the first precipitate by lead acetate, and in the filtrate from this precipitate.
The alcoholic filtrate was concentrated to a syrup which reduced Fehling solution and gave the characteristic tests for rhamnose already described.
The brown substance P, obtained from filtrate A by evaporation and extracting the residue with hot water, was suspended in warm water and dilute sulphuric was added.
The mixture was heated for several days on a water bath, filtered from unhydrolyzed resin and the filtrate was neutralized and concentrated in the way already described.
The fluorescent filtrate was shaken with ether, by which the green substance was removed, leaving the solution purple.
The filtrate did not give any color with ferric chloride, but it reduced Fehling solution.
The filtrate from the precipitate by sodium carbonate was concentrated by evaporation until sodium sulphate began to crystallize out.
This was treated with water, filtered, and the filtrate was evaporated, the water being replaced from time to time to remove acetic acid.
To thefiltrate was added an excess of a solution of lead acetate in 50 per cent.
The filtratewas evaporated to a small bulk, cooled, and filtered from crystals of potassium sulphate.
For instance, if an emulsion of the brain of a rabid animal is filtered through a germ-proof filter, the filtrate will be harmless.
This fact indicates that the infectious principle is not in solution, but is an organism withheld from the filtrate by the filter.
Return the filtrate and washings to the dish, evaporate the water, and carefully ignite without fusion.
Should other metals than alkali metals be suspected present the filtrate from the silica determinations should be examined.
The kerosene and gasoline filtrate was particularly clear, nevertheless the ash was found to contain 36.
To the filtrate from the insoluble matter add 40 cubic centimeters of half normal sulfuric acid, all the acid being added at once.
Test a portion of thefiltrate with a little basic lead acetate, which should produce no further precipitate (in the great majority of cases 5 cc.
In the filtrate remaining after having washed the fatty acids in the determination of total fatty and resin acids all the alkali present as soap, as carbonate and as hydroxide remains in solution as sulfate.
Place the combined kerosene filtrate and kerosene washings from the insoluble impurities determination in a platinum dish.
Should the filtratebe acid instead of alkaline, titrate with N/10 alkali and calculate the percentage of free fatty acid as oleic acid.
Add phenolphthalein to the filtrateand titrate with N/10 acid and calculate the per cent.
On the other hand, the deep blue filtrate from the Neradol D liquor exhibited well-defined tanning effects, and imparted a deep blue colour to the pelt.
That present as sulphates soluble in water is estimated in the residue on the filter: the residue is extracted with hot water, the sand filtered off, the filtrate acidified with HCl, boiled for one quarter hour and filtered if necessary.
The solution is filtered and the filtrate evaporated on the water bath till it occupies a volume of about 30 c.
The non-tannin filtrate must give no turbidity with a drop of a solution of 1 per cent, gelatine and 10 per cent, common salt.
After allowing the whole to stand in a cool place for one or two weeks, filter, mix the filtrate with 10 drachms of acetic ether, and fill in bottles.
The filtrate is made slightly alkaline, concentrated, then compounded with acid and the vanillin extracted with ether.
Strongly acidulate the filtrate with nitric acid and compound with nitrate of silver solution.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "filtrate" in a variety of sentences. We hope that you will now be able to make sentences using this word.
