Take 10ml of continued filtrate, add sodium hydroxide titration solution (0.Olmol/L) 0.25, with phenolphthalein indicator solution O.lml, should be red, plus hydrochloric acid titration solution (0.01mol/L)0.30, the strain is colorless, plus methyl red indicator solution 0.2ml, should be orange...
In the production of hydrofluoric acid and calcium sulfate by subjecting sulfuric acid and fluorspar to a partial preliminary reaction in a preliminary reaction zone and the reaction is completed in an after- reaction zone at a temperature from about 100° to 500° C, the improvement which ...
Barium can be removed by prior precipitation with sulfuric acid, but 7. Scope care must be exercised to prevent precipitation of calcium. Orthophosphate will precipitate calcium at the pH of the test. 7.1 This test method is applicable to most waters in a range from 1 to 1000 mg/L of ...
Glass surfaces: Glass surfaces were cleaned by sonication in 50% (v/v) 2-propanol in ultrapure H20 for 10 min, rinsed with ultrapure H20, and further cleaned and oxidized in 50% (v/v) H202and 50% (v/v) of 30% (v/v) sulfuric acid for 20 min. Surfaces were washed in ultrap...
(or CaO • Al2O3). Molecular weight 158.04. White monoclinic, triclinic or orthorhombic crystals. Melting point 1600 ℃, relative density 2.9825, refractive index 1.643, 1.665 and 1.663. Decomposed in water, soluble in hydrochloric acid, but insoluble in nitric acid and sulfuric acid. Calcium...
Here, 10 g of graphite flakes (graphite flake, natural, − 325 mesh, 99.8% metal basis; Alfa Aesar, Ward Hill, MA, USA) were dispersed in 250 mL of concentrated sulfuric acid (Fisher Scientific, Pittsburgh, PA, USA) in a 2 L Erlenmeyer flask. The graphite dispersion was placed ...
In the conventional wet processing of phosphoric acid production (reaction (1); note that here the fluorapatite mineral composition is taken as Ca5(PO4)3F0.9Cl0.1, based on that of the Esfordi concentrate), the fluorapatite mineral is leached with a mixture of sulfuric acid and phosphoric acid...
Folic acidVitamin supplementsExtract with 0.1M potassium phosphate buffer containing 0.1% sodium ascorbateZorbax RRHD Eclipse Plus C18column Phosphate buffer/MeCN UV 290nm OH-CbL CN-CbL Ado-CbL Me-CbLPharmaceutical formulationsDilution and direct injectionSpherisorb ODS-2 column ...
sulfuric, phosphoric, acetic, propionic, tartaric, fumaric, citric, benzoic, succinic, cinnamic, mandelic, salicylic, glycolic, lactic, oxalic, malic, maleic, malonic, fumaric, tartaric, p-toluenesulfonic, methanesulfonic, glutaric acid and other acids which, for instance, can be found in : P. ...
The modified calcium-containing bimetallic and polymetallic catalysts of this invention are modified with an organic or inorganic oxyacid having a divalent or polyvalent anion such as sulfuric acid, phosphoric acid, carbonic acid, pyrosulfuric acid and the like, or by a divalent or polyvalent metal...