Method for efficiently detecting content of trace germanium ions and application of method in germanium ore metallurgy
A technology of ion content and ion, applied in the metallurgy of germanium ore, in the field of high-efficiency detection of germanium ion content in trace amounts, can solve problems such as unsatisfactory repeatability, low sensitivity, and high cost, and achieve improved detection sensitivity, high sensitivity, and easy operation easy effect
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Embodiment 1
[0043] Electrode pretreatment: 1.0, 0.3 and 0.05 μm Al for bare glassy carbon electrodes, respectively 2 o 3 Powder polishing, followed by ultrasonic cleaning in ultrapure water, ethanol, and ultrapure water for 3 min, and then air-dried. Take an appropriate amount of germanium ion standard solution and bismuth ion standard solution, and use 0.1mol / L acetic acid-sodium acetate buffer solution (pH 4.5) to settle to 10mL to make the solution to be tested, so that Bi in the solution to be tested 3+ The ion concentration is 30 μg / L, insert the three-electrode system into the solution to be tested, scan and record the dissolution curve of germanium ions by square wave stripping voltammetry, conduct qualitative analysis according to the stripping potential, and perform quantitative analysis according to the current of the stripping peak.
[0044] The relationship between the concentration of different germanium ion standard solutions and the current was investigated, and the concen...
Embodiment 2
[0046] In order to further investigate the influence of the concentration of bismuth ions on the detection of germanium ions in step (1), after the bare glassy carbon electrode is processed, take a certain amount of bismuth ion standard solution and germanium ion standard solution, and use 0.1mol / L acetic acid-sodium acetate buffer solution (pH4.5) to 10mL, so that the germanium ion concentration in the solution to be tested is fixed at 0.1μmol / L, the bismuth ion concentration is 10, 20, 30, 40, 50μg / L respectively, the fixed deposition time is 540s, and the deposition potential It is -1.3V, according to the method described in Example 1, stripping voltammetry is measured.
[0047] The result is as figure 2 shown. The germanium ion peak current measured by square wave voltammetry showed a trend of first increasing and then decreasing with the increase of bismuth ion concentration in the range of 10-50μg / L. When the concentration of bismuth ions is 30 μg / L, the maximum peak ...
Embodiment 3
[0049] In order to investigate the influence of deposition time on the detection of germanium ions in step (2), after the glassy carbon electrode is processed, the concentration of germanium ions in the solution to be tested is fixed at 0.1 μmol / L, the concentration of bismuth ions is 10 μg / L, and the concentration of 0.1 mol / L acetic acid - Sodium acetate has a pH of 4.0. The deposition potential was fixed at -1.3V, and the deposition time was selected to be 120, 180, 240, 300, 360, 420, 480, 540 and 600s to detect germanium ions.
[0050] The result is as image 3 As shown, when the deposition time increased from 120s to 540s, the peak current of germanium ions increased significantly, and reached the peak value at 540s. When the deposition time was longer than 540s, the peak current began to decrease. When the deposition time is too short, a dense and uniform bismuth film cannot be formed on the surface of the bare glassy carbon electrode, and the germanium ions cannot be ...
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