Hi, I am looking to perform an analysis of Br/ KBr in samples of water sources to see if the levels are safe. Due to budget and resource limitation at the stage, I would prefer a method that considers these factors.
Kindly help.
Use search engines first, including AI. For example, Google provides, among others:
https://www.inorganicventures.com/forum/general-spectroscopy/bromine-analyses-by-icp?sort=desc&p=1
The 154.065 nm Br emission line is relatively free of interferences with reasonable detection limits of 10-50 ppb, and as such might offer a better option than ICP-MS. The problem with this measurement technique, i.e. ICP-AES (ICP-OES), is that only a few spectromer models operate in such far ultraviolet.
https://www.sciencedirect.com/science/article/abs/pii/S1387380618300848
International Journal of Mass Spectrometry Volume 432, September 2018, Pages 52-58
Determination of low bromine (Br) and iodine (I) in water with low- to high-salinity content using ICP-MS
https://www.researchgate.net/publication/343235331_Automated_ICP-MS_Method_to_Measure_Bromine_Chlorine_and_Iodine_Species_and_Total_Metals_Content_in_Drinking_Water
https://www.sciencedirect.com/science/article/pii/S2666831920300023?via%3Dihub
Talanta Open Volume 1, August 2020, 100002
Automated ICP-MS Method to Measure Bromine, Chlorine, and Iodine Species and Total Metals Content in Drinking Water
https://www.researchgate.net/publication/371801646_Halogen_and_Species_Determination_in_Surface_Water_by_Inductively_Coupled_Plasma_Mass_Spectrometry_and_Ion_Chromatography/figures?lo=1
Halogen (and Species) Determination in Surface Water by Inductively Coupled Plasma Mass Spectrometry and Ion Chromatography
And many others.
So rather ICP-MS first and possibly also Ion Chromatography.
J Res Natl Inst Stand Technol. 2003 Jan-Feb; 108(1): 49–55.
Published online 2003 Feb 1. doi: 10.6028/jres.108.005
PMCID: PMC4844526
PMID: 27413593
Potassium Bromate Assay by Redox Titrimetry Using Arsenic Trioxide
Johanna M. Smeller and Stefan D. Leigh
In their introduction they also mention several other methods with references.
Dear Zbigniew Jońca,
Your equation shows potassium bromide, and bromide but your text says potassium bromate, and bromate. Assuming your equations is correct, to measure the level of potassium ions I suggest using a K+ selective electrode. To measure bromide I would use the following spectroscopic assay.
- Bowen H.J.M. The determination of chlorine, bromide and iodide in biological material by activation analysis. Biochem. J. 1959; 73: 381
Philip G Penketh Thanks for pointing it out Philip.
it was a typo.
I need to measure the levels of bromide ions but a method to measure potassium bromide would also be acceptable. It is the latter which is a carcinogen and a compound of interest here, but if bromide ion level is high, KBr is more as a result. So measuring either of the two is useful.
KBr is 100% ionized and in aqueous solution the counter ion is anything that is a cation (positively charged) that is floating around. If your buffer contains K+ as the most common cation,then [Br-] = [KBr].
I have used the colorimetric assay previously given.
Bowen H.J.M. The determination of chlorine, bromide and iodide in biological material by activation analysis. Biochem. J. 1959; 73: 381
It is easy to use and cheap, despite using a gold salt because you don't use much.
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