Boron in natural waters by atomic absorption spectrometry with electrothermal atomization

Boron Determination—A Review of Analytical Methods

“…The AES methods measure emission from the atomized and excited species when they fall to ground state. The AES/AAS determination of B often requires separation and preconcentration of B from the sample matrix for acceptable results (117 (117,121,122). The ET-AAS method without the use of chemical modifiers has poor detection limit and sensitivity due to (a) inefficient thermal dissociation of B-containing species (probably oxides and carbides) produced by dissociative desorption of B 2 O 3 and (b) severe memory effects resulting from B atoms apparently undergoing a series of condensationvaporization steps, which causes a persistent plateau in the tail of AAS signals (85,122).…”