Table 2. Comparison of PILS Original (Old) and Reanalyzed (New) Vials From Flight 5 on 9 August 2004 [Old]/[New] SO42- (n = 42) slope (R2) 1.66 (0.84) NH4+ (n = 38) slope (R2) 1.54 (0.50) Oxalate (n = 34) slope (R2) 1.83 (0.50)