Owing to different losses, transport efficiencies of electrothermal vaporization (ETV) instrumentation depend on analyte element, matrix, vaporization temperature, ramp rate, and tube history.
An aliquot of the homogenized and spiked tissues is acid digested for determining the actual analyte element concentrations in the standards.
Differences in aerosol generation and transport efficiencies between solution nebulization and LA were assessed by ablating in-house hair material with known analyte element concentrations.
A precondition for the successful application of this method is that the internal standard element and the analyte element are homogeneously distributed within the sample, and that their behavior during ablation, transport, and ionization is similar.
Table 1 Parameters for working elements Analyte Wavelength (nm) Lamp intensity (mA) Split (nm) Cd 228.8 3 1.2 Pb 283.3 4 0.8 Table 2 Analytical parameters for arsenic determination by HGAAS Parameter Result Wavelength 193.7 nm Acid volume 10 mL (3 mol l−1 HCl) Reductant 10 g L−1 NaBH4 Reaction time 20 s Read time 50 s.
In order to precisely drop the analyte on sensor element, a polybenzoxazole (PBO) barriers with a height of several hundred micrometers were produced to separate the active area and the ground-single-ground (G-S-G) electrode using a second photolithographic technology.
Analyses included temperature fractions of organic and elemental carbon, elements (metals and associated analytes), inorganic ions (sulfate, nitrate), and speciation of resolvable organic compounds.
Elemental MS, such as inductively coupled plasma mass spectrometry (ICP-MS) can overcome these drawbacks; in fact, analytical performance is theoretically independent of the molecular structure of a target analyte naturally containing the elements of interest.
