Determination of trace metals in aluminium oxide by electrothermal atomic absorption spectrometry with direct injection of aqueous suspensions

Determination of Trace Mercury in Cosmetics by Suspension- Sampling Hydride Generation Atomic Fluorescence Spectrometry

“…Compared with traditional sample preparation methods, suspension formation combines the benefits of the solid and liquid sampling, avoiding the contamination and the loss of volatile elements and reduced sample amount needed. This mode has been extensively used in AAS 10,11 , ICP-MS 12 and AFS 13 .…”

Flame Spectrometry in Analysis of Refractory Oxide Single Crystals

“…The results of analysis of aluminium based oxide materials obtained using the proposed method of sample preparation and digestion in condensed phosphoric acid are shown in Table 8. One can see that aqueous extraction technique provides lower limits of determination (LOD) of Na, K and Ca and does not yield to more complicated techniques described in (Krasil ' shchik et al, 1989;Slovak et al, 1981) The possibility of application of subacid aqueous extraction technique combined with ultrasonic and microwave treatment for the determination of Co and Ni in -and -Al 2 O 3 fusion mixtures was studied. An ultrasonic dispenser UZDN-A (Selmi, Ukraine) with operating frequency of 22 kHz a microwave digestion system MDS-2000 (CEM, USA) were used for the treatment of subacid aqueous suspensions of Al 2 O 3 powders.…”

Amostragem de suspensões: Emprego da técnica na análise direta de amostras

“…com a finalidade de se obter uma distribuição homogênea do material sólido 52 . A seguir, a agitação é interrompida e uma alíquota da amostra é transportada e introduzida no atomizador 77 . A alíquota da amostra também pode ser transportada sob condições de agitação contínua 78 .…”