Agricultural chemical analysis. Founded upon 'Leitfaden für die agricultur-chemische Analyse' von F. Krocker |
Gyakori szavak és kifejezések
20 grms acetic acid acidulated added air-dried alcohol alkaline earths alumina ammonia ammonic carbonate ammonic oxalate analysis aqueous argentic nitrate baric chloride beaker boiling c.c. capacity c.c. of water calcic carbonate calculated cane-sugar carbonic acid carbonic anhydride cipitate clay colour combustion combustion-tube containing cork cupric cupric oxide decomposed delivery-tube described determined dilute dissolved distilled water dried at 100 drops estimated ether evaporated to dryness excess extract Fehling's solution ferric oxide ferrous filter filtrate finely-powdered flask glass glucose grms heated hydrate hydrochloric acid ignited indigo insoluble iron lime liquid litre magnesia magnesic manures method milk moisture neutralised nitric acid nitrogen obtained organic matter oxalic acid phosphate phosphoric acid platinic chloride platinum crucible platinum dish plumbic portion potassic powdered precipitate residue salt sand silica soda-lime sodic carbonate soil solution of sodic specific gravity starch substance sugar sulphuric acid superphosphate temperature tion treated tube volume volumetrically washed water-bath weighed whilst
Népszerű szakaszok
282. oldal - Al Sb A As Ba Bi B Br Cd Cs Ca C Ce Cl Cr Co Cb Cu...
i. oldal - Frankland.— AGRICULTURAL CHEMICAL ANALYSIS, A Handbook of. By PERCY FARADAY FRANKLAND, Ph.D., B.Sc., FCS, Associate of the Royal School of Mines, and Demonstrator of Practical and Agricultural Chemistry in the Normal School of Science and Royal School of Mines, South Kensington Museum. Founded upon Leitfaden für die Agriculture Chemiche Analyse, von Dr.
241. oldal - If some of the indigo remains unoxidised, a little experience will enable the operator to judge its probable amount, and so decide on the quantity of indigo suitable for the next experiment. The amount of indigo which corresponds to the solution of nitrate is found by a series of approximating experiments made as just described with varying quantities of indigo, the oil of vitriol used being always equal in volume to the united volumes of the nitrate solution and indigo. The determination is finished...
73. oldal - Soils.—Have a wooden box made, 6 inches in length and width, and from 9 to 12 inches deep, according to the depth of soil and subsoil of the field. Mark out in the field a space of about 12 inches square ; dig round in a slanting direction a trench, so as to leave undisturbed a block of soil...
241. oldal - ... nitrogen corresponding to each part of the indigo scale, and by the help of this table every analysis subsequently made is calculated. Below is given an ideal table of this description. It is assumed, which is very near the truth, that a diminution to one-eighth in the strength of the nitrate solution is accompanied by a diminution to one-tenth in the indigo consumed. It is further assumed, which is also near the truth, that the alteration in the relation of the indigo to the nitrate proceeds...
100. oldal - The most convenient temperature is 140°, but in the case of vegetable extracts it is well to commence at 130°, as there is some risk of the contents of the retort frothing over. The gas is collected in a small jar over mercury. As soon as one operation is completed, the jar is replaced by another full...
243. oldal - Unless, therefore, the oil of vitriol used was absolutely pure, it would always be necessary to standardize the indigo as now recommended, even if the relation of indigo to nitric acid were exactly the same in weak and strong solutions. By standardizing, as now described, the errors due to the sulphuric acid affect the figures of the table, but not the result of the analysis. Such standardizing has also the effect, as far as it goes, of calibrating the burette, any inequalities of capacity falling...
241. oldal - C.; and as the temperature keeps rising from the evaporation of the solution, it is necessary to bring it down to the required point by the addition of a little water or chloride of calcium solution immediately before each experiment. The chloride of calcium bath is not required when strong solutions of...
76. oldal - ... is washed into a small dish, where it is dried and weighed, after which it is ignited and weighed again ; the two weights give the proportion of coarse sand and its organic matter. The elutriated turbid fluid is allowed to stand for several hours, and the water is then poured off into another beaker. The deposited matter, consisting of fine sand and fine soil, is then subjected to a second elutriating process, conducted as before, except that the force and volume of the washing water is considerably...
282. oldal - Sodium, Strontium, Sulphur, Tantalum, Tellurium, Thallium, Thorium, Tin, - - Titanium, Tungsten, « Uranium, Vanadium, * Yttrium, ... Zinc, Zirconium, Mo Ni...