Interference of salt matrices in the determination of copper by atomic absorption spectrometry with electrothermal atomization

Direct analysis of solids by graphite furnace atomic absorption spectrometry using a second surface atomizer

“…Reactions that involve the analyte and either the surface or gas-phase reactants are common to both solution-deposited samples and solids. Similarly, analyte occlusion in the host matrix can alter the rate of release of the analyte (18). This effect may be more pronounced with solids, since the mass of the matrix is increased.…”

Determination of Trace Lithium in Human Urine by Electrothermal Atomic Absorption Spectrometry Using Nitric Acid as a Chemical Modifier to Eliminate the Interference of Chloride

“…This was because chlorine existing in urine interfered with Li signals, while this kind of interference was suppressed by 0.5% HNO3. 24 Besides HNO3 had some ability to enhance the sensitivity of Li as the absorbance of H2O and 0.5% HNO3 blanks were the same (data not shown). This was because NO3 -increased the numbers of free Li atoms during the atomization step.…”

The Interference Effect of a Mixture of Magnesium, Aluminium, Sulfate and Chloride on the Atomization and Vaporization of Manganese in Graphite Furnace Atomic Absorption Spectrometry

“…During drying and pyrolysis, the analyte may be occluded into the matrix particulates. 17,19,20 During pyrolysis, volatile compounds of the analyte with matrix constituents may be lost from the furnace. 1,3,16 In the atomization step, expulsion of the analyte by the matrix gases, 3,17,18 as well as gas-phase reactions between the analyte and the matrix decomposition products, 4,6,[21][22][23] may take place.…”