Chronometric Catalytic Method for the Determination of Micro Quantities of Iodine

Sandell, E. B.; Kolthoff, I. M.

doi:10.1021/ja01321a510

Cited by 203 publications

(62 citation statements)

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“…Iodine concentrations were evaluated by photometric procedure (Photometer ECOM 6122, Eppendorf, Hamburg, Germany) based on Sandell & Kolthoff reaction (19,20) in the modification of Lorenz-Wawschinek et al (21,22). The calibration range of this method has a detection limit of 1-300 mg/l.…”

Section: Clinical Chemical Measurementsmentioning

confidence: 99%

Geographic variations in the frequency of thyroid disorders and thyroid peroxidase antibodies in persons without former thyroid disease within Germany

Meisinger

Ittermann

Wallaschofski

et al. 2012

European Journal of Endocrinology

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Objective: To investigate regional variations in the frequency of undiagnosed thyroid disorders among 25-to 88-year-old men and women in two communities in the northeast and the south of Germany. In addition, autoantibodies to thyroperoxidase (TPO-Abs) and urinary iodine excretion were determined. Methods: Two population-based surveys of men and women using a common standardized protocol, the Study of Health in Pomerania (SHIP) in the northeast of Germany (2505 participants) and the Kooperative Gesundheitsforschung in der Region Augsburg (KORA) in the south of Germany (2316 participants), were compared with regard to the frequency of undiagnosed thyroid disorders. Results: Compared with the northeast of Germany, urinary iodine excretion and serum thyroidstimulating hormone (TSH) levels were significantly higher in the south. The median urinary iodine concentration was 110 mg/l (64; 169 mg/l) in SHIP and 151 mg/l (97; 214 mg/l) in KORA, and the median TSH value was 0.81 mIU/l (0.56; 1.15 mIU/l) in SHIP and 1.22 mIU/l (0.84; 1.80 mIU/l) in KORA. The frequency of elevated TSH (TSH R2.12 mIU/l) was 4.3% in SHIP and 14.1% in KORA (P!0.001); the corresponding values for suppressed TSH (!0.25 mIU/l) were 3.5 and 1.7% (P!0.001). The proportion of ultrasonographic findings was 55.5% in SHIP and 68.0% in KORA. The frequency of serum TPO-Abs did not differ significantly between northeast and south Germany. Conclusions: There were considerable regional disparities in the frequency of thyroid disorders within Germany. These differences can be explained not only by different regional histories of natural iodine deficiency but also by current differences in the iodine supply under an identical nationwide iodine fortification program.

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Section: Clinical Chemical Measurementsmentioning

confidence: 99%

Geographic variations in the frequency of thyroid disorders and thyroid peroxidase antibodies in persons without former thyroid disease within Germany

Meisinger

Ittermann

Wallaschofski

et al. 2012

European Journal of Endocrinology

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“…Kinetic spectrophotometric methods, which are based on the reaction, found by Sandell and Kolthoff (1934) set the foundation for the development of different methods for the determination of iodine in environmental samples (mostly water). The said reaction proceeds according to the following equation (1) Iodine has a catalytic effect upon the course of reaction (1), i.e., the more iodine is present in the preparation to be analyzed, the more rapidly proceeds the reaction (1).…”

Section: Water Samplesmentioning

confidence: 99%

“…The lower the determined concentration of cerium (IV) ions, the faster the reaction, thus a larger amount of catalyzing agent, i.e., iodine. By these means it is possible to directly and quantitatively measure the iodine concentration of the test solution, though execution of such processes is complicated and demands extensive measuring times (Sandell & Kolthoff, 1934, 1937. The above-described method was modified in various ways, for example by replacing H 2 SO 4 with HNO 3 (used for acidifying the reaction mixture).…”

Section: Water Samplesmentioning

confidence: 99%

A Review of Spectrophotometric and Chromatographic Methods and Sample Preparation Procedures for Determination of Iodine in Miscellaneous Matrices

Błażewicz¹

2012

Macro to Nano Spectroscopy

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“…On the other hand, kinetic methods of analysis are very simple and low-cost alternatives for iodide determination. Among them, the very sensitive Ce(IV)-As(III) [12][13][14][15][16] and NO2 --[Fe(SCN)] 2+ reactions [17][18][19] have been frequently used. The reaction system Bromopyrogallol Redchloramine T 20 was applied for determination of I -with very poor reproducibility.…”

Section: Introductionmentioning

confidence: 99%

Kinetic-Photometric Determination of Iodide Based on Its Inhibitory Effect on the Bromate Oxidation of Victoria Blue 4-R

2004

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A new sensitive kinetic method has been developed for the determination of trace amounts of I -over the range of 50 -300 ng cm -3 . The method was based on the inhibitory effect of iodide on the oxidation of Victoria Blue 4-R by KBrO3. The reaction is monitored spectrophotometrically at 596.3 nm. Method development includes optimization of reagent concentration and temperature. The kinetic parameters of the reaction were reported and a rate equation was suggested. The effects of certain foreign ions upon the reaction rate were determined for the assessment of the selectivity of the method. The proposed method was successfully applied to the determination of iodide in real samples. The new developed method was found to have fairly good selectivity, sensitivity, simplicity and rapidity.

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Chronometric Catalytic Method for the Determination of Micro Quantities of Iodine

Cited by 203 publications

References 0 publications

Geographic variations in the frequency of thyroid disorders and thyroid peroxidase antibodies in persons without former thyroid disease within Germany

Geographic variations in the frequency of thyroid disorders and thyroid peroxidase antibodies in persons without former thyroid disease within Germany

A Review of Spectrophotometric and Chromatographic Methods and Sample Preparation Procedures for Determination of Iodine in Miscellaneous Matrices

Kinetic-Photometric Determination of Iodide Based on Its Inhibitory Effect on the Bromate Oxidation of Victoria Blue 4-R

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