[asad]

aluminium ions presence in a salt is confirmed by performing a test called blue lake test i have been trying to get it rught in my chem lab for weeks but in vain can anyone suggest the exact method i should use the way i perform the test is that i take solution of aluminium salt in a test tube add few drops of litmus solution then acidify with dil. HCl then add NH4OH(ammonium hydroxide) and allow to stand . the result i should get is blue ppt. floating in colourless solution but i haven't got this result at all can anyone help me perform the test better?

[Kdub]

what aluminum salt??

[mike]

aluminium ions presence in a salt is confirmed by performing a test called blue lake test i have been trying to get it rught in my chem lab for weeks but in vain can anyone suggest the exact method i should use the way i perform the test is that i take solution of aluminium salt in a test tube add few drops of litmus solution then acidify with dil. HCl then add NH4OH(ammonium hydroxide) and allow to stand . the result i should get is blue ppt. floating in colourless solution but i haven't got this result at all can anyone help me perform the test better?

If you have been doing this test for weeks and getting a negative result is there a possibility that there are no aluminium ions present in the sample?