Research On Test Paper Successive Determination Of Gold, Silver And Copper In Core Sample

Gold, silver and copper are widely used in our daily life, however, with the development of the society, the requirement for these metal products is more and more. Thus, finding the core sample containing these metal elements are extremely important. How to find the core sample containing gold, silver, copper rapidly and accurately? For a long time, the main research line is as follow:the field of mining; laboratory tests; the conclusion; the development of core sample. For determination of three elements, the sample is tested by three different kinds of methods, respectively, that is, one element requires one test method. A large amounts of equipment, reagents and data process are executed, which will go through a long and complicated process.A fast and continuous use in the determination of gold, silver and copper in core sample, which called paper method, detected gold, silver and copper contents by using gold, silver and copper determination box continuouslly. The method is the fact that are dissolved with hydrochloric acid and cosolvent, using a good deal of chicken (duck) egg skins as gold and silver strips, the special filter paper cut into 2cm×1.5cm size of the adsorbed film as a copper strip,4,4'-methylamino-diphenyl-methylthio ketone and bath copper reagent as reagent. Comparing with the reference color, the result is consistent with the reference value. This method is fast, simple, low cost, low pollution, less solvent and short time in contrast to previous measurements of gold, silver, copper methods.In the first part of the paper, determinating gold,silver and copper experimental methods are studied. How to choose the appropriate test papers and the reaction conditions and time of the impact of acidity on the reaction, interfering ions on the reaction and so on are studied. Comparing the paper method with other methods, the result suggests that it is very close to those of other methods.The second part of the paper studied paper method of detecting gold, silver, copper continuously in ore. It studied the decomposition method of suitable ore using acid decomposition method in the decomposition of the general sample. If ore samples are decomposed with aqua regia, the nitric acid will quickly decompose, resulting in a large number of NO2, C12 and other toxic gases. This paper adopted a certain solvent of NaN03, which slowed down the release rate of NO2 and C12 and reduced pollution.The method can continuously test gold, silver and copper, and get the results compared gold, silver and copper standard solution to gold standard samples. The recovery rate was calculated by recovering test paper which indacated between 90%-110%. The results that dipstick values and reference values were basically same satisfied us.