Volumetric Determination of Calcium in Presence of Phosphate

Abstract

not interfere and even sharpened the color change slightly when present in amounts of between 10 and 50% of the total solution volume. However, the presence of any base such as ammonia or amines, which might be used to decompose the Grignard complex formed in the preparation of the ketimines, interfered with the analysis. A new

Synthesis and characterization of surface‐modified PBLG nanoparticles for bone targeting: In vitro and in vivo evaluations

“…The method used for the evaluation of the calcium‐binding capacity was performed as described by Yalman et al21 Ten microliters of standard calcium solution (0.05 mEq Ca +2 /mL) was incubated with 10 mL of NPs suspension. After incubation for 3 h under gentle magnetic stirring at 100 rpm, samples were centrifugated (MR 1812; Jouan Centrifugeurs, France) for 15 min at 3000 g .…”

Feedstuffs Analysis, Rapid Determination of Calcium in Feedstuffs

“…Since bone analysis had been reported (8) to be satisfactory by the back titration method, six fat-extracted, left tibias from mature hens were dry ashed, dissolved, and included in some of the tests.…”

“…Magnesium interference is a problem in the latter method but can be overcome by the use of high pH and indicators specific to calcium at this pH. Phosphate interference, a problem in both methods, has been eliminated by ion exchange (3,5), precipitation (4), masking (6), and back titration (2,8).…”

A review of age estimation methods in marine mammals with special reference to monodontids

“…The end point can be determined physically, by the pliability of the specimen, or chemically, by an ammonium oxalate turbidity test which detects the presence of calcium ions (Yalman et al 1959). For larger teeth, radiography can be used to determine if a tooth is fully decalcified.…”