Ionic silver with vitamin C?

Hi, I was wondering if anybody know about this phenomenon. I made ionic silver solution with 10ppm and I put it in black plastic container which happened to be pre-used Vitamin C container. I thought that I washed the container well before, but may be a bit of powder left over? not sure. The clear solution turned to umber yellow colour as soon as I pored it in. I checked TDS meter and measured 5mmp. I do not know what happened.Does it turn to colloid?