Determination of trace sodium and nitrogen in aluminium
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The determination of sodium in aluminium by flame photometry linear extrapolation method and heat extraction method as well as that of nitrogen in aluminium by photometric method using Nessler's reagent have been studied. Results sammerized are as follows:(1) The emission intensity curves of sodium in aluminium on the flame photometry were measured using electric recerder, and it was found that back ground intensity of sodium in 589mμ could be obtained by investigating those of 580 and 600mμ, and calibration curve of aluminium hydrochloric acid solution with varying amounts of sodium was linear at the range of 0 to 7ppm of sodium, suggesting that the linear extrapolation method in the determination of sodium in aluminium should be applicable.(2) The heat extraction method as a simple method was discussed, and it was found that almost all amounts of sodium in shaving sample conld be extracted by reheating for five times at 950°C for 30 minutes.(3) With Nessler's reagent photoelectric method for determination of nitrogen, the sample solution should be slowly poured in sodium hydroxide solution, and measurements should not be played untill a complete distillation of ammonia was observed.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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