Direct Determination of Manganese in Biological Materials Using Electrothermal Atomization Atomic Absorption Spectrometry with a Molybdenum Tube Atomizer

Determination of manganese in herbal medicine samples by slurry-sampling electrothermal atomic absorption spectrometry with a metal tube atomizer

“…At pyrolysis temperatures above 780°C, the signal decreased abruptly. This phenomenon has been observed for aqueous manganese solutions [34]. The appearance temperature of the manganese signal, defined as the temperature of metal atomizer giving a peak absorbance of 0.0044, was approximately 1180°C.…”

“…We have previously reported [34,35] that the optimum purge gas in ETA-AAS with a molybdenum tube atomizer was Ar 480 mL min -1 +H 2 20 mL min -1 and the optimum atomization temperature was 2100°C for obtaining a sensitive AA signal and protecting the metal atomizer from oxidation by residual traces of oxygen in the atomizer chamber. Subsequent experiments for slurry-sampling ETA-AAS were therefore performed under these experimental conditions.…”

“…Herbal medicines usually contain large amounts of Ca, Mg, Na, and K. In previous work [34,35] it was observed that aluminium, sodium, potassium, calcium, and magnesium interfered with atomization of Mn from aqueous solution. Using the molybdenum tube atomizer the effects of Al, Ca, Fe, Mg, K, Na, and Zn on the manganese absorption signal were investigated for 10% glycerol solution.…”

“…Electrothermal atomization AAS (ETA-AAS) with a metal tube atomizer, which is similar to GFAAS, is known to enable better sensitivity for most metal elements, and better reproducibility at relatively low power and low cost [33,34,35]. Despite these advantages there is still little information on the combination of the metal tube atomizer in ETA-AAS with slurry-sampling for the determination of manganese in drugs [36,37].…”

Determination of Manganese in Urine and Whole Blood Samples by Electrothermal Atomic Absorption Spectrometry: Comparison of Chemical Modifiers

“…Adsorptive stripping voltammetry (AdSV) has been applied to measure Mn concentration. Ohta et al 21 described a method for the direct determination of manganese in biological samples by using ETAAS with a molybdenum tube atomizer and a matrix modifier. The effects of large amounts of interferents were investigated and eliminated by the addition of thiourea.…”