Pure tungsten powder is a kind of tungsten powder with high purity. It has strict requirements on impurity content, and can be made into silk, rod, tube, plate and other processed materials and certain shape products. Arsenic and tin is a trace impurity elements in pure tungsten powder, its content is a control index for tungsten powder purity, using graphite furnace atomic absorption spectrometry, sensitivity, good accuracy, quick and easy.
In order to control the impurity elements in pure tungsten powder, it is necessary to accurately determine the trace elements of arsenic and tin. Determination of trace arsenic and tin in pure tungsten powder by graphite furnace atomic absorption spectrometry is reliable and simple and fast.
Chose the graphite furnace atomic absorption spectrometry determination of trace arsenic in pure tungsten powder and the best parameters of tin, arsenic when decomposition temperature is 700 ℃, the atomization temperature of 900 ℃ for 1, tin the decomposition temperature is 700 ℃, atomization temperature 300 ℃ for 2, separation of tungsten acid precipitation, nickel matrix modifier, when the quality of the nickel concentration is 0.4 g•L - 1, the best test results. The determination of trace arsenic and tin in pure tungsten powder by graphite furnace atomic absorption spectrometry was established.
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