Question

how to distinguish between the flame colors of lithium , calcium and strontium salts
DrBob222
The best way is to get samples of salts of Li, Ca. and Sr and do flame tests with each until you are clear about the different colors. Li is a crimson color, Ca is a dull red and Sr is a much stronger red color. But these colors are different for different people so do known samples until you can distinguish between the three easily.