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Table 2 Intermediate precision values obtained using the methods for vitamin B1, B6, B2 and C analyses in PN

From: Chemical stability study of vitamins thiamine, riboflavin, pyridoxine and ascorbic acid in parenteral nutrition for neonatal use

   80% 100% 120%
  Day ID RSD (%) IT RSD (%) ID RSD (%) IT RSD (%) ID RSD (%) IT RSD (%)
B1 1 1.78 1.40 1.89 2.00 0.48 0.88
  2 1.26   0.63   1.06  
B6 1 0.63 0.90 1.68 1.55 0.41 1.96
  2 1.01   0.95   0.98  
B 2 1 0.40 1.18 1.09 1.59 1.08 1.61
  2 1.17   0.67   0.90  
C 1 0.71 1.46 0.57 1.33 0.43 0.56
  2 0.69   0.55   0.43  
  1. ID RSD means intraday relative standard deviation and IT RSD interday relative standard deviation of 3 measurements average in each day. n = 2 lots.