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Table 1 Regression analysis results of data for assaying vitamins B1, B6, B2 and C by HPLC, fluorescence and iodometric titration, respectively

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

Features Vitamins
  B1 B6 B2 C
Range 20-60 μg/mL 30-90 μg/mL 1-5 μg/mL 50-150 mg
Regression equationa Y = 214695 x + 3168877 Y = 191100 x - 130681 Y = 57.9 x + 28.3 Y = 0.1x + 2.36
SE of intercept 2140.2 694.4 4.5 4.05
SE of slope 48166.4 3445.3 1.9 0.0
Correlation coefficient (r 2) 0.9984 ± 1.45·10-3 0.9989 ± 1.54·10-3 0.9999 ± 0.00 0.9999 ± 5.0·10-5
  1. ay = bx + a, where x is the concentration in μg/mL, except for vitamin C in mg, y is the peak area, for HPLC method, the intensity for fluorescence and volume for titration; a is the intercept and b is the slope. SE= standard error.