I am not able ejaculate during sexual intercourse. But I can in materbition. Can I ejacualte and put it in test tube and pour into vagina.

Not quite with tube. Presume u wish to impregnate partner in which case ejaculated semen needs 2b placed high in vagina. Would be impossible from test tube, but possible from a syringe.(without needle). Thus, ejaculate into small clean glass container. Aspirate into 3 or 5ml syringe. Lubricate syringe with Normal Saline ; gently insert syringe as far as possible up vagina with partner lying face up with hips on pillow.