The use of inductively coupled plasma mass spectrometry for the evaluation of the mobility of iodine in bentonite

Mestek, Oto; Kaňa, Antonín; Eichler, Štěpán; Hofmanová, Eva

doi:10.1080/03067319.2013.840830

Cited by 3 publications

(2 citation statements)

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“…Memory effects occurring in the transport system of the ICP-MS (polymer pipes, nebulizer, and spray chamber), and elimination of these effects were discussed elsewhere. [38] TMAH is a suitable agent for the alkaline digestion of biological tissues; however, its concentration should be optimized for maximum yield of the extraction. Table 2 shows the results (n = 3) of analyses of SRM 1549 "NonFat Milk Powder" digested with the TMAH solution of various concentrations.…”

Section: Speciation Analysis Using Iecmentioning

confidence: 99%

“…Solution of 100 mmol L −1 ammonium nitrate (extra pure, Merck, Darmstadt, Germany) served as the mobile phase for IEC [38]; the pH was adjusted via the addition of a 25% ammonia solution (SupraPur, Merck, Darmstadt, Germany) to a value of 7.4. As a mobile phase for the SEC, a buffer solution of 0.02 mol L −1 tris-(hydroxymethyl)-aminomethane (Fluka-Chemie, Neu-Ulm, Germany), adjusted with HCl (SupraPur, Merck, Darmstadt, Germany) to pH 7.5, was used.…”

Section: Reagentsmentioning

confidence: 99%

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Analysis of iodine and its species in animal tissues

Kaňa

Hrubá

Vosmanská

et al. 2015

Chemical Speciation & Bioavailability

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A method allowing the determination of the total iodine content and iodine species in samples of animal tissues using inductively coupled plasma mass spectrometry (ICP-MS) as an elementspecific detector was developed. The total iodine content was determined after microwave digestion with 25% (w/w) water solution of tetramethylammonium hydroxide. The detection limit was 26.9 μg kg −1 I, and the accuracy of the determination was proven through the analysis of SRM "Non-Fat Milk Powder, " porcine liver, and Atlantic Cod muscle samples using standard addition methods. The extracts for the speciation analysis were prepared through sample dispersion in water using an Ultra-Turrax® T10. The extraction yields ranged from 46 to 84% for different types of tissues. The determination of the inorganic iodine species was performed using ion-exchange chromatography (PRP X100, mobile phase 100 mmol L −1 ammonium nitrate, pH 7.4) coupled to ICP-MS. A detection limit of 1.1 μg kg −1 I was obtained for both species. The organic iodine species were separated using size-exclusion chromatography (Superdex 75 column, mobile phase 20 mmol L −1 Tris-HCl, pH 7.5) and also detected using ICP-MS. Samples of porcine muscle, liver, kidney and thyroid gland, chicken muscle and liver and Atlantic Cod muscle were analyzed. The porcine thyroid gland and Atlantic Cod muscle samples were the richest in iodine (a more than 10× greater content of iodine than the other samples). With respect to the inorganic species, only iodide was found in the sample extracts. Conversely, many organic iodine species were found in the extracts.

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Section: Speciation Analysis Using Iecmentioning

confidence: 99%

Section: Reagentsmentioning

confidence: 99%