Determination method of iron, cobalt and nickel content in iron-cobalt-nickel ternary alloy powder
A ternary alloy and measurement method technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems of large dilution multiples, cumbersome detection methods, and long time consumption , to meet the needs of mass testing, fast sample testing, and simple operation
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Embodiment 1
[0054] Embodiment one simulation experiment: (c EDTA=0.0505mol / L)
[0055] Take by weighing 0.4936g of pure cobalt, 0.9451g of pure iron, and 0.9949g of pure nickel, and after adding acid, be settled in a 250ml volumetric flask to obtain a simulated ternary mixed solution, and the content of iron, cobalt, and nickel is detected as follows according to the above method:
[0056] 1. Accurately pipette 5ml of the above solution into an Erlenmeyer flask, slowly add a buffer solution with pH=5.5 until a reddish-brown precipitate is formed, leave it for 10-15min, filter with quantitative filter paper, and collect the filtrate in another 250ml Erlenmeyer flask;
[0057] 2. Titrate the filtrate with EDTA standard solution to 1ml before the end point, add 10ml of buffer solution with pH=10 and 0.2g uric acid amine indicator, the solution is light yellow, continue to titrate the solution with EDTA, the solution turns purple as the end point, The volume of EDTA consumed is the total amo...
Embodiment 2
[0093] Embodiment two standard addition recovery experiment:
[0094] The recovery rate of standard addition is a quality control technique often used in the laboratory for self-control. The purpose is to judge the influence of the measurement process of the sample on the measurement results. The general recovery rate is required to be between 95% and 105%. The recovery rate of the determination method is within 95% to 105%, indicating that the method is suitable for the detection of the cobalt-nickel-iron ternary alloy.
[0095] Select a ternary alloy sample, quantitatively add the standard substance 0.1974g, 0.3980g, 0.3780g of Co, Ni, Fe, constant volume 100mL volumetric flask, get 5mL according to the detection method described in the application of the present invention, carry out the standard addition recovery test, The obtained experimental results are as follows:
[0096]
[0097] The precipitation separation method was used for titration, and the standard addition...
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