somanyquestions
Member
Hi everyone
Today I got some samples of rock and a kind of earth stuff from the same location what should contain gold. I made the standard procedure for the earth kind of stuff and wash it, take Nitric acid to remove impurities, then the AR part. Stannous Chloride test show black purple color reaction. After filtering I add Sulfamic acid for denox, then SMB. Now start the strange part: There was no precipitation after adding SMB, I test again with Stannous and got a orange reaction....what does that mean and what metal it may indicate?
The solution was still yellow-ish after 6 hours, so I was fed up and poured 50ml Stannous Chloride into the solution to see what happen. In a instantaneous reaction the color change to clear like water and some silver shiny crystals precipitated. Then the solution turn to a color I would describe as peach and get cloudy. The crystals still are still visible at the bottom of the beaker but now some brown stuff start to precipitate out, I assume that could be the gold I´m looking for.
Can anybody explain the chemical reaction to me I initiated and may tell me what those crystals are? Thanks guy´s,
Today I got some samples of rock and a kind of earth stuff from the same location what should contain gold. I made the standard procedure for the earth kind of stuff and wash it, take Nitric acid to remove impurities, then the AR part. Stannous Chloride test show black purple color reaction. After filtering I add Sulfamic acid for denox, then SMB. Now start the strange part: There was no precipitation after adding SMB, I test again with Stannous and got a orange reaction....what does that mean and what metal it may indicate?
The solution was still yellow-ish after 6 hours, so I was fed up and poured 50ml Stannous Chloride into the solution to see what happen. In a instantaneous reaction the color change to clear like water and some silver shiny crystals precipitated. Then the solution turn to a color I would describe as peach and get cloudy. The crystals still are still visible at the bottom of the beaker but now some brown stuff start to precipitate out, I assume that could be the gold I´m looking for.
Can anybody explain the chemical reaction to me I initiated and may tell me what those crystals are? Thanks guy´s,