General Spectroscopy - Bromine analyses by ICP
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Bromine by ICP analyses will generally be measuring Br as bromide or bromate in solution, particularly for aqueous matrices, and our stock CGICBR1 product (1000 ug/mL bromide from NH4Br) would be well suited for such analyses. We also offer a stock 1000 ug/mL bromate standard (ICBRO31), but this product is manufactured from KBr, and the presence of potassium can hinder IPC measurements (particularly for ICP-MS). The technical difficulty for ICP-MS is that Br has only two isotopes (masses 79 and 81) that typically suffer significant interferences from the Ar dimer present at mass 80 (or KCl on mass 79), resulting in relatively poor detection and quantification limits. If an ICP-OES is available that can measure at wavelengths below ~170 nm, then 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. |