Oxygen Consumption
Robert A. Greenwald in CRC Handbook of Methods for Oxygen Radical Research, 2018
Gas release in the flasks occurs when the excess alkaline hydrazine reacts with potassium iodate; it can be seen from the equation that reaction of 1 μmol of KIO3 releases 1.5 μmol of nitrogen. However, before constants can be calculated, it is necessary to correct the readings for changes in the thermobarometer. Conventionally, manometer changes resulting from gas evolution are designated “positive” and those from gas uptake “negative”. The rule for the thermobarometer is “change the sign and add”. Table 2 shows this more clearly. Once these corrections have been made, one can calculate that 1.6 μℓ of 2 mM KIO3 will yield 4.8 μmol of N2 at NTP and the flask constant (k) can be obtained from the observed manometer change in mm (hr) according to Equation 3:
Potassium Iodide
Sarah H. Wakelin, Howard I. Maibach, Clive B. Archer in Handbook of Systemic Drug Treatment in Dermatology, 2015
Iodine is an essential dietary mineral, required for the biosynthesis of tri-iodothyronine and thyroxine by the thyroid gland. Deficiency of iodine leads to ‘endemic goitre’, intellectual and developmental disabilities, which can be prevented by the routine addition of iodine to dietary salt in the form of potassium iodide (KI) or potassium iodate (KIO3). KI was first isolated in seaweed in the 19th century, and thereafter it was used to treat both thyroid disorders and various dermatological and infective diseases. Its use then dwindled until the 1970s when reports appeared of its benefit in treating the neutrophilic dermatoses, erythema nodosum and nodular vasculitis.
Evaluation of the Potential of Microspherical Systems for Regional Therapy in the Tumor-Bearing Liver and Kidney Using Techniques in Nuclear Medicine
Neville Willmott, John Daly in Microspheres and Regional Cancer Therapy, 2020
For all of the iodine tracers, it is important to remember that radionuclide which becomes detached from the microsphere, either because of leaching of the label or breakup of the microsphere, will concentrate in the thyroid. To protect the thyroid from an excessive radiation dose it is necessary to block uptake using either oral potassium iodide or potassium iodate. The duration of the blocking therapy will vary according to the particular radioisotope of iodine being used, the rate of breakup of the radiolabeled protein, and the administered activity.7 For 99mTc, 111In, and 113m In, blockade is unnecessary.
Interference of preservatives on urinary iodine measurement by Sandell–Kolthoff method
Published in Scandinavian Journal of Clinical and Laboratory Investigation, 2022
Elif Kaya, Murat Usta, Ömer Emecen, Sembol Yıldırmak
The method based on the Sandell-Kolthoff reaction was used for urinary iodine measurement [3,7]. Among the various modified applications based on the classical photometric Sandell-Kolthoff method, the Ohashi's microplate method with ammonium persulfate digestion was performed [4]. The absorbances were measured at 405 nm in a microplate reader (AccuReader M965/965+, Metertech Inc., Version 1.13, Taiwan) at 22°±1 °C for the reaction mixtures in microplates. The five levels of potassium iodate (KIO3) solutions were used as standards. The results were expressed as µmol/L.
An accidental exposure to dimethyl sulfate
Published in Clinical Toxicology, 2019
Xuetao Zhang, Zhihong Wang, Xiaoqin Tang, Zubing Wang
The incident was a consequence of the courier sender who transported the hazardous chemicals illegally. He admitted that the liquid was DMS. The accident scene was blocked by the police; unfortunately toxic substances in the workshop were not tested. The chemical composition of the liquid was determined by the solid-liquid mass spectrometer. It was confirmed that the main composition was dimethyl sulfate; a small amount of iodoethane, potassium iodate and chromyl chloride were also found.
Related Knowledge Centers
- Chemical Compound
- Iodine
- Oxidizing Agent
- Oxygen
- Potassium
- Potassium Hydroxide
- Reducing Agent
- Iodic Acid
- Potassium Chlorate
- Potassium Bromate