Please look at the following below link which may help you in your analysis:

https://www.ossmaine.com/wp-content/uploads/2017/08/Oil-in-Ammonia-Introduction.pdf

Thanks

Hi

Do you have anhydrous ammonium sulphate in analytical grade? Based on my knowledge, this compound is unstable usually and commonly find as other sulphate salts.

Generally in extraction process anhydrous sodium sulphate is suggested for the dehydration step because its stable and can be totally dried in a high temperature oven if mainained under the unsuitable conditions.

Mina Yazdanpanah , Isam Eldin Hussein Elgailani thank you for your answers which are useful for me.