![Micro-extraction procedures for the determination of Ra-226 in well waters by SF-ICP-MS [An article from: Analytica Chimica Acta]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR3FSA.jpg)
Micro-extraction procedures for the determination of Ra-226 in well waters by SF-ICP-MS [An article from: Analytica Chimica Acta]
Book Details
PublisherElsevier
ISBN / ASINB000RR3FSA
ISBN-13978B000RR3FS3
MarketplaceUnited Kingdom 🇬🇧
Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The radium-226 (t"1"/"2=1622 years) content of highly alkaline well water collected from the United Arab Emirates (UAE) was measured by double focusing sector-field inductively coupled plasma-mass spectrometry (SF-ICP-MS) after separation of the radium from other alkaline earth elements using a newly developed procedure. The results were comparable with those obtained by @a-spectrometry for samples with concentrations ranging from 6.75 to 459pg/L (0.25 to 17Bq/L). Instrumental sensitivity on matrix-free samples was compared for two sample introduction systems, i.e. an Apex-Q high sensitivity system and a concentric nebulizer. A 12-fold improvement in sensitivity (instrumental detection limit=1.5pg/L or 55mBq/L) was found when the Apex-Q system was used. Two chromatographic methods were tested for the sequential separation of the alkaline earth elements contained in the well water samples in order to reduce matrix and polyatomic interference effects. Optimal elution parameters were determined and used for the separation and pre-concentration of Ra-226 in those samples. A method detection limit of 0.189pg/L (7mBq/L), which corresponds to a mass of 0.38fg of Ra-226 in the sample, was achieved. Only 2mL of sample is necessary when a combination of 50W-X8 and Sr*Spec resin, which are reusable, are utilized for the separation. This new analytical protocol significantly reduces sample preparation time resulting in a throughput rate of approximately 20 samples in only 8h; faster than the other published extraction procedures.
Description:
The radium-226 (t"1"/"2=1622 years) content of highly alkaline well water collected from the United Arab Emirates (UAE) was measured by double focusing sector-field inductively coupled plasma-mass spectrometry (SF-ICP-MS) after separation of the radium from other alkaline earth elements using a newly developed procedure. The results were comparable with those obtained by @a-spectrometry for samples with concentrations ranging from 6.75 to 459pg/L (0.25 to 17Bq/L). Instrumental sensitivity on matrix-free samples was compared for two sample introduction systems, i.e. an Apex-Q high sensitivity system and a concentric nebulizer. A 12-fold improvement in sensitivity (instrumental detection limit=1.5pg/L or 55mBq/L) was found when the Apex-Q system was used. Two chromatographic methods were tested for the sequential separation of the alkaline earth elements contained in the well water samples in order to reduce matrix and polyatomic interference effects. Optimal elution parameters were determined and used for the separation and pre-concentration of Ra-226 in those samples. A method detection limit of 0.189pg/L (7mBq/L), which corresponds to a mass of 0.38fg of Ra-226 in the sample, was achieved. Only 2mL of sample is necessary when a combination of 50W-X8 and Sr*Spec resin, which are reusable, are utilized for the separation. This new analytical protocol significantly reduces sample preparation time resulting in a throughput rate of approximately 20 samples in only 8h; faster than the other published extraction procedures.
