In the filtrate the remaining silver, if there should be any, was determined by the ordinary titration, but with "sulphocyanate" of one-tenth the strength. ❋ Cornelius Beringer (1886)
In these experiments 100 c.c. of "sulphocyanate" (very accurately measured) was run into the solution containing the weighed portion of bullion (fine silver) and, after shaking the solution, was filtered. ❋ Cornelius Beringer (1886)
As long as FeCl or even Cu2Cl is present, if the print is immersed in the sulphocyanate solution, sulphocyanate of copper is immediately formed on the reduced parts, while on the others the sulphocyanide of copper, formed and dissolved by the sulphocyanide of potassium in excess, becomes decom ‐ posed with water in soluble sulphocyanide of copper and deposited as such on the parts already covered with the salt. ❋ Peter C. Duchochois (N/A)
After this action has commenced, if the proof be not immediately immersed in a solution of sulphocyanate of potassium, Cu2Cl passes over to a higher combination of chlorine, and the paper is again fit to be impressed anew by the action of light. ❋ Peter C. Duchochois (N/A)
Healthy saliva is slightly alkaline, and contains sulphocyanate of potassium. ❋ William Thomas Fernie (N/A)
Certain samples contain small quantities of ammonium sulphocyanate, an extremely poisonous substance for plants. ❋ Charles Morton Aikman (N/A)
After washing the print is immersed in a solution containing 0.5 parts of chloride of gold for 2,000 parts of distilled water, and then fixed in a bath of sulphocyanate of potassium, which tones the image blue-black. ❋ Peter C. Duchochois (N/A)
Those from the grained negatives employed in photogravure are still more perfectly developed in a tepid solution of potassium sulphocyanate, since the impressions wholly consist of insoluble parts (the lines) and gelatine not acted on. ❋ Peter C. Duchochois (N/A)
The presence of this dangerous impurity is easily detected by adding ferric chloride, which, in presence of the sulphocyanate, produces a blood-red colour. ❋ Charles Morton Aikman (N/A)
_Sinapine_, the alkaloid which exists as sulphocyanate in white mustard seed, yields, under the same reaction as that applied to atropine and piperine, quite different results. ❋ Various (N/A)
The solution of ammonium sulphocyanate should be compounded with auric chloride to tone the picture at the same time it is fixed; thus: ❋ Peter C. Duchochois (N/A)
The reduction is hastened by warming, and is complete when the solution is quite colourless and a drop of the liquid tested with sulphocyanate of potassium gives no reaction for ferric iron. ❋ Cornelius Beringer (1886)
In the determination of chlorides in sea-water, Dittmar used a combined method: precipitating the bulk of the silver as chloride, and after filtering, determining the small excess of silver by sulphocyanate. ❋ Cornelius Beringer (1886)
The sulphocyanate solution is standardised by placing 50 c.c. of the silver nitrate solution in a flask with 20 c.c. of dilute nitric acid, diluting to 100 c.c. with water, and running in the sulphocyanate until the greater part of the silver is precipitated; then adding 2 c.c. of the ferric indicator, and continuing the titration until a reddish-brown colour is developed, and remains permanent after shaking continuously. ❋ Cornelius Beringer (1886)
If the sulphocyanate solution be made up with 11 or 12 grams of the potassium salt to the litre, and be then standardised and diluted, so that for 100 c.c. it shall equal 1.08 gram of silver, (see p. 38), then it will also equal .25 gram of arsenic (As). ❋ Cornelius Beringer (1886)
~Potassic Cyanide~ is an easily fusible and somewhat volatile salt, which, when fused, readily removes oxygen and sulphur from metallic compounds, and forms potassic cyanate or sulphocyanate as the case may be. ❋ Cornelius Beringer (1886)
_The standard sulphocyanate of potassium_ solution is made by dissolving ❋ Cornelius Beringer (1886)
~ -- Volhard's process is based upon the precipitation of silver in nitric acid solutions with potassium sulphocyanate, the finishing point being the development of a reddish-brown colour, produced by the action of the excess of sulphocyanate upon ferric sulphate. ❋ Cornelius Beringer (1886)
~ -- Take 50 c.c., or a smaller quantity (if necessary), dilute up to the mark with distilled water, and determine with potassium sulphocyanate, as described under _Colorimetric Iron_. ❋ Cornelius Beringer (1886)
Nitrous acid strikes a red colour with the sulphocyanate of potassium; consequently, when nitric acid has been used in excess, high results may be obtained. ❋ Cornelius Beringer (1886)
