Identification Tests Calcium

Calcium Gluconate, 60 Calcium Glycerophosphate, 60 Calcium Hydroxide, 61 Calcium Hydroxide TS, 850 Calcium Hydroxyapatite, 69, (Sl)10 Calcium Identification Test, 753 Calcium Iodate, 62 Calcium Lactate, 62 Calcium Lactobionate, 63 Calcium Lignosulfonate, (S 1)7 Calcium Oxide, 64 Calcium Pantothenate, 64 D-Calcium Pantothenate, 64 Calcium Pantothenate, Calcium Chloride Double Salt, 66 Calcium Pantothenate, Racemic, 65 Calcium Peroxide, 67 Calcium Phosphate, Dibasic, 67, (Sl)8 Calcium Phosphate, Monobasic, 68,... 

Two identification tests for oxytetracycline hydrochloride are given in the USP 28 [1], one being an ultraviolet absorption test and the other a color test. European Pharmacopoeia [2], British Pharmacopoeia (BP) 2003 [4], International Pharmacopoeia [5], and Pharmacopoeia of the People s Republic of China [6] described a thin-layer chromatography and color tests for identification of oxytetracycline hydrochloride and oxytetracycline dihydrate. For identification of oxytetracycline calcium, USP 28 [1] used Method II under identification of tetracycline <193>, whilst BP 2003 [4] described a TLC, color test, and calcium test as the method of identification. 

The USP [2] describes the following identification tests for edetic acid, edetate disodium and edetate calcium disodium. 

A. Prepare a 1% solution by dissolving 1 g of sample in 99 mL of deionized water. Using a motorized stirrer and a propeller-type stirring blade, stir the mixture for about 2 h. (Save part of this solution for Identification Test B). Draw a small amount of the solution into a wide-bore pipet, and transfer it into a solution of 10% calcium chloride. A tough, wormlike gel forms instantly. 

Wollastonite. Wollastonite is a fibrous calcium silicate sometimes used in industry as a substitute for asbestos. Further testing will be necessary if wollastonite is present. See the discussion on fiber rolling, and the table on identification of fibers by dispersion stain. 

Identification A 1 10 aqueous solution gives positive tests for Calcium and for Acetate, Appendix IHA. 

Identification A sample dissolves, with effervescence, in 1 A acetic acid, in 2.7 A hydrochloric acid, and in 1.7 A nitric acid, and the resulting solutions, after boiling, give positive tests for Calcium, Appendix IIIA. 

Identification Slake 1 g of sample with 20 mL of water, and add glacial acetic acid until the sample is dissolved. The resulting solution gives positive tests for Calcium, Appendix IIIA. 

Shell is made of calcium carbonate - a mineral - and held together by an organic matrix. As with all other organic gem materials it is rarely possible or advisable to carry out any of the usual gemmological tests which involve chemicals, as they could damage the material. Visual identification is the safest option and should be sufficient. 

Limestone, coral, and seashells are composed primarily of calcium carbonate. The test for the identification of a carbonate is to use a few drops of hydrochloric acid. The unbalanced equation is... 

Spot test This test has been used universally as rapid, nrm-specific means for detecting the presence of certain unspecified lichen substances. This test is most convenient and simple to perform, even under field conditimis. However, this is only a preliminary step in the process of identification of lichens or its substances. In order to identify accurately the secondary metabolite present in the lichen thaUus, one has to perform more sensitive test such as TLC or HPLC. Spot test is carried out by placing a small drop of reagent on the lichen thallus, either directly on the upper surface (cortex) or on the medulla. In the later case, the cortex is scraped or superficially cut with the help of a blade. The reagents used are 10 % aqueous KOH solution (K), saturated aqueous solution of bleaching powder (NaOCla) or calcium hypochlorite (Ca(OCl)2) (called as Q and 5 % alcoholic... 

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