Microdetermination of Iodine

Abstract

CHEMISTRY however, are the results obtained with ether-soluble lac. The values reported in the literature for this portion of lac are generally between 90 and 110, compared with the low value of 70 obtained by the present method. Possibly the ether-soluble portion of lac contains ester linkages highly susceptible to alkali; a structure involving a lactone linkage has been suggested by Bhowmik and Sen (7). The saponification value of the ether-soluble lac is about the same as that mentioned in the literature.

Factors Affecting Determination of Protein-Bound Iodine in Serum

“…The reduction proved to be independent of the amount of iodide present in the distillate and experiments along those lines were terminated. Thomas et al (12) have published a modification employing arsenious acid and sodium hydroxide, which is apparently successful. In later experiments, conducted after publication of Thomas' proposal, the same partial decolorization was obtained.…”

Distillation of Micro Quantities of Iodine

“…Prepare standard curves for each set of determinations at levels of 0.00, 0.05, and 0.10 microgram of iodine. DISCUSSION A large part, if not all, of the iodine is distilled as free iodine, and Barker (1), Talbot et al (10), and Thomas et al (13) recommended using a reducing agent in the absorption chamber to effect more complete absorption. Barker uses sodium sulfite and Talbot e< al.…”

Iodine and Iodine Compounds

“…Reactivity of unsaturated organic iodides is affected little if iodine is attached to one of the carbon atoms involved in the double bond, but reactivity is promoted if iodine is attached to the carbon atom in the α position to the double bond. Iodine in organic compounds can be determined after being converted into an inorganic form by heating the compound with one of the following: (1) fuming nitric acid in a sealed strong glass tube, the Carius method; (2) sodium peroxide in a combustion container; or (3) a mixture of chromic and sulfuric acids, followed by addition of phosphoric acid and distillation into a solution of sodium arsenite [41].…”