That is odd about the black bits? I don't have an answer for you on that one, but the dark color is probably a sign of infection or protein (which you know you have). I did a 24 hour urine a few months ago and turned out I couldn't hand it in on the weekend either. So I was told to keep it in the fridge. Gross, yes. But as long as it stays cold, it will still be a useful sample when you hand it in on Monday.
Hope this helps. I'd be interested to know what the black bits are.
I can do anything through Jesus Christ who strengthens me. I have learned in whatever state I am in,to be content. Phillipians 4:11-13
34 years old. Diagnosed with lupus in 2000. Fibromyalgia, anti-phospholipid syndrome(APS)(stroke),Sjogren's, Raynaud's, seizure disorder-(miraclulously disappeared!), Libman Sach's Endocarditis, vasculitis, sacroiliitis, arthritis (neck) . Prednisone, Imuran, Coumadin, Clobazam, Amitriptyline, didrocal, Cozaar, calcium, Cykolokapron, multi-vitamin, vitamin D, Magnesium, vitamin B6, Acidophilus