Determination of ethylenediaminetetra-acetic acid in foods by colorimetry.

ethylenediaminetetra acetic acid (EDTA)

The kinetics of reducti on of Cr(VI) by thiourea has been studied spectrophotometrically in an HClO~ medium. The reaction follows overa ll third order kineti cs. first order each in Cr(V I), thi ourea and HCIO~. The react ion is HCIO~ catalyzed. Addi tion of M n(II ) and Ce( I V) ions largely decrease the reaction rate. The reaction rate is increased by add ition of EDTA. The spectrophotometri ...

Determination of lead chelated with ethylenediaminetetra-acetic acid in blood after precipitation of protein with perchloric acid.

Cernik, A. A. (1970). Brit. J. industr. Med., 27, 40-42. Determination of lead chelated with ethylenediaminetetra-acetic acid in blood after precipitation of protein with perchloric acid. A method is described for the determination of lead in whole blood containing ethylenediaminetetra-acetic acid. Proteins were precipitated by 2-0 M perchloric acid. The ionized lead in the supernatant was chel...

Demineralization in organic solvents by alkylammonium salts of ethylenediaminetetra-acetic acid.

1. Insoluble salts of alklaine earth metals (e. g. calcium phosphate) dissolve in non-aqueous solvents containing EDTA salts of organic cations (e.g. tetraethylammonium). 2. Bone is efficiently demineralized in ethanolic trimethylammonium EDTA. Retention in the matrix of water-soluble materials (e.g. proteoglycan) is much better than in standard aqueous EDTA demineralization procedures.

Investigation on Ethylenediaminetetra-Acetic Acid as Corrosion Inhibitor for Mild Steel in 1.0M Hydrochloric Acid

Acetic acid interference with determination of 5-hydroxyindoleacetic acid obviated.

1. Pratt, J. J., Steroid immunoassay in clinical chemistry. Clin. Chem. 24, 1869 (1978). 2. Shackleton, C. H. L., and Whitney, J. 0., Use of Sep-pak cartridges for urinary steroid extraction: Evaluation of the method for use prior to gas chromatographic analysis. Clin. Chim. Acta (in press). 3. Thenot, J.-P., and Horning, E. C., MOTMS derivatives of human steroids for GC and GC-MS studies. Anal...