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矿物中H_2O~+测定历来沿用宾斯菲尔法。微量矿物由于受标本数量及天平感量所限,该法不敷应用。Keidel曾用Pt-P_2O_5-H_2O体系测定气体或有机液中微量水,方法基础系根据法拉第定律电解0.5克子分水(9.01克)需96,500库伦电量而设计的一个铂电解池。仪器设计成动态平衡式,在标准状态下电解1ppm水消耗13.2微安电流。 Keidel电解池是两根铂丝和两根铜丝相间而绕在一根直径为1毫米的轴上,外面用聚四氟乙烯塑料(或玻璃)固定。除去轴,铜丝用硝酸蚀去后,构成一内壁有两根螺旋型铂丝相间而又互不相碰的细管,其内壁放大绘制如图1。然后
Mineral H_2O ~ + measurement has always been used Bin Sphinx method. Trace minerals due to the number of specimens and balance the amount of flu is limited, the method is not enough application. Keidel used a Pt-P 2 O 5 -H 2 O system for the determination of trace amounts of water in gases or organic liquids based on the Faraday’s law for electrolysis of 0.5 g subdivision (9.01 g) of a platinum cell designed for 96,500 coulombs. The instrument is designed to be dynamically balanced, electrolyzing 1 ppm of water under standard conditions and consuming 13.2 μA of current. The Keidel cells are two platinum wires and two copper wires wound around a 1 mm diameter shaft with Teflon plastic (or glass) on the outside. Remove the shaft, copper nitrate etching with nitric acid to form a wall with two spiral type platinum wire but not touching each other thin tube, the inner wall of the enlarged drawing. then