GFAAS Determinate Lead Element in Tungsten Trioxide

Graphite furnace atomic absorption spectrometry (GFAAS) is the current method of atomic absorption analysis performed atomization by using a graphite material tube, cup-shaped atomizer. All participated samples in atomic avoiding dilution atomic concentration of gas in the flame, the analytical sensitivity is significantly improved. The method for the determination of trace metals is a better performance than other methods, and it can be used to analyze solid samples and the direct analysis of a small sample, so it is widely used. GFAAS is used in the field of food, medicine, environmental monitoring, health, and other aspects of clinical medicine.

Lead is weak and strong, poisonous, heavy metal. The original color of it is green white in air .its surface is quickly covered with a layer in dark gray oxide. It can be used for construction, lead-acid rechargeable batteries, warheads, artillery shells, welding materials, fishing equipment,, radiation protection materials, trophies and part of the alloy, such as pewter electronic welding used. Lead is a metal element; it can be used as sulfuric acid, corrosion-resistant, anti-gamma ray, batteries and other materials. Type alloys of lead can be used as bearings, cable sheathing and other purposes, but also sports equipment shot.

Weighing 0.5g of tungsten trioxide in a quartz beaker, adding 10ml of ammonia dissolved in the low temperature furnace, adding 10ml 10% tartaric acid after cooling, and shaking the quartz agent, diluting to the mark with distilled water. Experimental results show that using tartaric acid complex tungsten can eliminate entrainment effect of lead tungstate in the mixed solution. Due to the high chloride and lead form gaseous metal chloride, chlorine moiety with the purge gas discharge caused by the loss of the lead, so the impact on the determination of nitrate increases.

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