Colorimetry calcium

Calcium Colorimetry Phosphorus Tubers Eggs, vegetables Lyophilization, dry ashing EDTA titrimetry... 

Also, boron can be analyzed by colorimetry techniques (APHA, AWWA, and WEF. 1999. Standard Methods for the Examination of Water and Wastewater, 20th ed. Washington DC American Public Health Association). Boron in acidified aqueous phase reacts with curcumin to form a red-colored product, roso-cyanine. Presence of calcium and magnesium at high concentrations can interfere in the test. Another colorimetric measurement involves the reaction of boron with carmine or carminic acid in concentrated sulfuric acid. The color of the solution changes from bright red to bluish red or blue, depending on boron concentration. 

Elemental composition Ca 50.03%, C 14.99%, N 34.98. A measured amount of the compound is hydrolyzed with water. The product CaCOs is filtered, dried and determined by gravimetry. Calcium carbonate or the parent calcium cyanamide may be digested with nitric acid, diluted appropriately, and analyzed for Ca by AA or ICP spectroscopy. The hydrolysis product in solution, ammonia, may be measured by ammonium ion selective electrode, or by colorimetry followed by Nesslerization. 

Elemental composition Ca 28.03%, Cl 49.59%, O 22.38%. Calcium can be measured by various instrumental techniques or wet methods (see Calcium). Hypochlorite ion may be analyzed by ion chromatography. Free chlorine (as CI2) in the aqueous solution may be measured by DPD colorimetry or by iodo-metric titration (see Chlorine). 

Elemental composition Ca 29.46%, H 0.74%, P 22.77%, O 47.04%. The compound may be identified by x-ray analysis. Calcium may be analyzed by AA or ICP spectrometry in aqueous matrix following acid digestion. Phosphorus in the aqueous solution may be determined by colorimetry (see Phosphorus). 

Calcium may be analyzed by AA or ICP spectrophotometry. Its aqueous solution may be analyzed for phosphorus by colorimetry (see Phosphorus). 

Elemental composition Ca 38.76%, P 19.97%, 0 41.26%. Calcium may he analyzed by AA, and ICP, or x-ray methods (see Calcium). The orthophosphate anion may be analyzed by colorimetry (see Phosphorus). For colorimetric analysis the insoluble tribasic phosphate must be brought into aqueous phase hy dissolving in dilute sulfuric acid. 

The determination of common inorganic anions (fluoride, chloride, nitrite, bromide, nitrate, phosphate, and sulfate) and cations (sodium, potassium, magnesium, and calcium) was traditionally carried out using wet chemical methods such as gravimetry, titration, photometry, tmbi-dimetry, and colorimetry. 

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