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Rapid analysis of the constant field of gold

Rapid analysis of the amount of gold field Xie fashion, Zhao Caihong, GE is strong (1. Xinjiang Bureau of Geology and Mineral Resources Geological Team of the seventh laboratory Wusu 833000; 2. Xinjiang Bureau of Geology and Mineral Resources, Institute of Geology and Mineral Resources, Xinjiang Urumqi 830000) 1, Abstract of this Law based on polyurethane foam method of gold with a strong adsorption, the gold samples were collected at the scene after the man crushed to HNO3. NaC1 solution mining, the adsorption of gold by the burning of polyurethane foam, dissolved after the titration of hydroquinone. Test 2 Digestion conditions: I-INO3 Dosage Weigh GBW (E) 70015 standard sample 10.0g, fixed plus 25% NaC1100ml, the ore by changing the amount of HNO3 operating procedures,[link widoczny dla zalogowanych], standard sample Au content of 10.0g / t the test shows a more suitable choice 15mlHNO3 (Table 1). Table 1 showed the amount of nitrate-HNO3 (m1) 5Au () 6.42__ - lO8.63 - 159.74_ - 209.85___ - 309.6NaCI Dosage Weigh GBW (E) 70015 standard sample 10.0g Add 100ml water, fixation 15mlHNO3, changing the NaC1 content, according to procedures for operation of this ore, Au content of standard samples 10.0g / t, more appropriate test that used 20gNaC1 (Table 2). Table 2 Analysis of sodium chloride was 3 Weigh artificial crushing of ore ~ (180 mesh) 10.0g,[link widoczny dla zalogowanych], pour 200ml Space cup, add 15mlHNO3, 100ml20% NaC1,[link widoczny dla zalogowanych], tighten the lid, water bath 1h, while it is hot add 2g of ammonium hydrogen fluoride After cooling add 0.2g polyurethane foam, hand-shaking for half an hour, remove the foam, water wash, with half a sheet of qualitative filter paper (11cm) package,[link widoczny dla zalogowanych], put 30ml porcelain crucible, add ethanol 1-3ml, in the coal Furnace ash to the non-carbon black, add 3-5 drops of 20% KCI, 5ml aqua regia,[link widoczny dla zalogowanych], evaporated water bath, add 1ml1: 1HC1 steam to non-sour, add pH2.5 buffer, 5.0ml, 0.1 benzidine % 3 drops of hydroquinone with 1ml is equivalent to 20gAu titration to pale yellow solution is the end ... just take off. The results of the test results compared with standard sample results in Table 3. Table 3 test results compared with standard sample 4 to discuss the method for field units are designed to find gold. Test proved that no electrical equipment in the field situation, accurate and timely completion of the day to the rapid analysis of gold. Law NaC1 solution mining with HNO3 a most important feature is that not only greatly reduces the economic and environmental pollution. If the sample contains s, As and organic matter, to be dissolved after the first roasting ore. Adsorption of Au with foam, you can Add a few drops to enhance the collection with saturated bromine water rates. Foam by activated before use, to increase the adsorption rate of Au. Calibration standard solution of hydroquinone, it is best to take samples of the standard gold and shock absorption in the same conditions.