I describe a micro-scale method for determining lead in whole blood by utilizing a graphite furnace. Sample pretreatment consists of fivefold dilution with a dilute surfactant. The method is directly calibrated with lead standards prepared in dilute HNO3. To eliminate a small, nonspecific absorption signal from the blood matrix, simultaneous background correction is used. Interlaboratory co...

The United States Environmental Protection Agency (EPA) requires the determination of important trace elements in a variety of environmental samples. Graphite furnace atomic absorption methods are recommended for some elements including As, Se, Cd, Pb, Tl, Sb, Ag, Be and Cr. Graphite furnace analyses can be difficult due to chemical and spectral interferences. Quantification in atomic absorptio...

The investigation centered on how additives such as Graphite, asbestos varied at different percentages can affect the refractory properties of pure termite hills. Experimental analysis was carried out on such properties as Refractoriness, porosity, permeability, thermal shock resistance, linear shrinkage, Bulk density and specific gravity. Through pure termite hill has low refractoriness (1400o...

The gas temperature of atomospheric gas in a graphite atomizer was measured during an atomization stage in graphite furnace atomic absorption spectrometry (GF-AAS), by using a two-line method under the assumption of Boltzmann distribution. Iron and nickel were chosen as the probe elements to compare the gas temperatures obtained with different pairs of spectral lines. The atomic absorptions of ...

Graphite furnace techniques are characterized by excellent analytical sensitivity and are the methods of choice for the determination of trace elements in various environmental, biological, and clinical samples. However, they can be plagued by matrix interferences which complicate methods development and sample analysis. This is particularly true for the determination of volatile elements in co...

ZnO nanowires were grown in gram quantities on graphite flakes (as collector) using the vapour transport and condensation approach. The yield, defined as the weight ratio of ZnO nanowires to the original graphite flakes, has been studied thoroughly by tuning the various growth parameters such as pressure and temperature inside the tube furnace, the amount of graphite powder in the original sour...

A description is given of the development by collaborative study of a standardised method for the determination of cadmium in crude and refined oils and fats by graphite furnace atomic absorption spectrometry. The procedure is rapid and sensitive allowing determination at levels of 1–10 mg/kg

In this graphite-furnace atomic-absorption spectrometric method for measuring manganese in whole blood, we use a pyrolytic platform to minimize interference by sample matrix. For optimal sample ashing we denature the sample within the furnace with nitric acid and use oxygen as the purge gas at low temperatures. The mean manganese concentration found in blood from 15 unexposed city dwellers was ...

The investigation centered on how additives such as graphite, asbestos varied at different percentages can affect the refractory properties of pure termite hills. Experimental analysis was carried out on such properties as refractoriness, porosity, permeability, thermal shock resistance, linear shrinkage, bulk density and specific gravity. Through pure termite hill has low refractoriness (1400C...