Potassium nitrate

About: Potassium nitrate is a research topic. Over the lifetime, 3537 publications have been published within this topic receiving 29450 citations. The topic is also known as: Nitric acid, potassium salt & Saltpeter.

Diuretic action of potassium salts

Abstract: For two centuries certain potassium salts have been employed as diuretics in clinical medicine. In 1679 Thomas Willis 1 recommended the use of potassium nitrate or "salt of niter" in the treatment of dropsy. Wilks and Taylor 2 used it successfully in 1863. In 1921 Blum 3 and Magnus-Levy 4 were able to show that potassium chloride could be administered safely by mouth in relatively large doses and that it produced frequently a satisfactory diuresis. Since then, McCann and his co-workers, 5 Osman 6 and Barker 7 have obtained similar results with potassium citrate, bicarbonate and chloride. Barker emphasized the importance of giving a diet in which the sodium content was low and that of potassium relatively high. It occurred to us in 1932 that potassium nitrate might be the salt of choice, if potassium itself should have an additional diuretic action to the well known effect of the nitrate

Plant nutrient solution for soilless culture of tomato

Abstract: The invention provides a plant nutrient solution for soilless culture of tomato. The plant nutrient solution is prepared by the following raw materials in part by weight: 2 to 4 parts of potassium nitrate, 3 to 8 parts of calcium nitrate, 1 to 5 parts of magnesium sulfate, 1 to 3 parts of potassium phosphate, 1 to 2 parts of potassium sulphate, 1 to 2 parts of monopotassium phosphate, 0.1 to 0.15 part of Na2-EDTA, 0.05 to 0.1 part of Fe-EDTA, 0.01 to 0.05 part of molybdic acid, 0.01 to 0.03 part of manganese sulfate, 0.3 to 0.5 part of sodium tetraborate, 2 to 4 parts of superphosphate, 0.003 to 0.01 part of zinc sulfate, 0.001 to 0.002 part of copper sulfate, 0.001 to 0.003 part of ammonium nitrate, 1 to 3 parts of urea, 1 to 2 parts of organic acid, 0.5 to 1 part of beta cyclodextrin, 0.05 to 0.1 part of vitamin B, 2 to 4 parts of chitosan, 1 to 2 parts of nicotinamide, 0.5 to 2 parts of amino acid, 0.3 to 0.5 part of diethyl aminoethyl hexanoate, 0.02 to 0.5 part of gibberellin, and 5,000 to 7,000 parts of water. According to experiment, the plant nutrient solution provided by the invention can be used for carrying out soilless culture of tomato, and the tomato has high plant height, thick stem, high cluster and high output.

Oxidative flow injection amperometric determination of nitrite at an electrochemically pre-treated glassy carbon electrode

Abstract: Nitrite is oxidised at a relatively high positive potential at a glassy carbon electrode. Electrochemical pre-treatment of the glassy carbon electrode on-line in a flow injection system was shown to be beneficial in reducing the overpotential involved and allowing determinations to be made at slightly less positive potentials. More important, however, oxidations were cleaner at the electrochemically pre-treated electrode in that the signals obtained were of maximum height (i.e., oxidation was complete) and were highly reproducible, and the loss of signal over numerous injections of nitrite was negligible. Electrochemical pre-treatment and determination in 0.1 M sulphuric acid, 0.1 M phosphate buffer (pH 7), 0.1 M potassium nitrate solution and 0.1 M sodium carbonate solution were studied. Marginally better results were obtained with the sulphuric acid medium than with the phosphate buffer but, in view of the low stability of nitrite, particularly at low concentrations, in sulphuric acid, determination in phosphate buffer is recommended. The detection limit was 3 ng ml–1(based on twice the noise level) and the signals were rectilinear up to at least 30 µg ml–1.

Factors governing the electrochemical synthesis of α-nickel (II) hydroxide

Abstract: The electrodeposition of α-nickel hydroxide is promoted by the simultaneous chemical corrosion of the electrode by an acidic nitrate bath. Chemical corrosion results in the formation of a poorly ordered layered phase which is structurally similar to α-nickel hydroxide and provides nucleation sites for the deposition of the latter. Therefore under conditions which enhance corrosion rates such as low current density (<1.3 mA cm−2), high temperature (60 ∘C), high nickel nitrate concentration (≥ 1M) and the resultant low pH (∼1.7), α-nickel hydroxide electrodeposition is observed, while β-nickel hydroxide forms under other conditions. Further, α-nickel hydroxide deposition is more facile on an iron electrode compared to nickel or platinum.