(1) The nickel crucible was used instead of the platinum dish sample for the analysis of K20Na 20. The nickel crucible was prone to corrosion and contained trace nickel ions in the solution. The determination of KZO and Na 20 on the flame photometer did not affect the analysis results;

(2) During the analysis process, the nickel crucible and glassware must be cleaned, and K 'and Na' cannot be brought in;

(3) The nickel crucible replaces the platinum dish, and it is not easy to overflow the solution when decomposing the sample, and it is easy to evaporate and drive out the 503 white smoke, so as to improve the analysis speed;

(4) K20Na ZO was analyzed with nickel crucible samples, and the accurate data was stable with good reproducibility