Determination of lead in napkins and facial tissues by microwave digestion-steam generation atomic fluorescence spectrometry

Using the fiber-optic pressure-controlled closed microwave rapid digestion system, the microwave digestion solution and digestion procedure for lead in napkins and facial tissues were established, and the working conditions of the hydride generation-atomic fluorescence spectrometer and the optimal hydrogenation reaction conditions were determined, and satisfactory analysis was obtained. result. The relative standard deviation is 1.8% ~ 3.7%, and the recovery rate is 96.5% ~ 101.3%.

Offset Printing blanket is different from general rubber products, rubber cloth it is laden with the ink on the plate is passed on to the paper, in order to make the Printing Ink evenly, points clear, rich layers, offset printing rubber cloth must have moderate hardness, compressive deformation is small, good ink performance and low elongation, etc, in chemical properties on it should have already adsorption ink and adsorption effect of the education version fluid and to have not react with oil, and potions and by oil, liquid erosion performance.And because it is lithography, so the blanket flatness requirements are very high.

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