for those who're familier with my curent GC saga from my earlier posts in the last 2 days: I went to AZ and bought 6 qts of GC. there were 3 bottles of the US made 0/30 behind these, and then there were 4 GC btls behind those! After coming home, I realized that I have GC from 2 different batches: 4 bottles of: MO 23386B784 2 bottles of: MO 30426B T/W0504281 According to Pscholte, the 1st batch no. is a pretty old one, and can have high ppm of Iron. How about that 2nd batch no? is it newer? does anybody know? knowing this would help me to interpret my uoa's Fe contents better, I think. Will be very thankful if someone who knows about GC batch no's can help..