Table 1 |
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Regression analysis results of data for assaying vitamins B1, B6, B2 and C by HPLC, fluorescence and iodometric titration, respectively |
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Features |
Vitamins |
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B1 |
B6 |
B2 |
C |
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Range |
20-60 μg/mL |
30-90 μg/mL |
1-5 μg/mL |
50-150 mg |
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Regression equationa |
Y = 214695 x + 3168877 |
Y = 191100 x - 130681 |
Y = 57.9 x + 28.3 |
Y = 0.1x + 2.36 |
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SE of intercept |
2140.2 |
694.4 |
4.5 |
4.05 |
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SE of slope |
48166.4 |
3445.3 |
1.9 |
0.0 |
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Correlation coefficient (r2) |
0.9984 ± 1.45·10-3 |
0.9989 ± 1.54·10-3 |
0.9999 ± 0.00 |
0.9999 ± 5.0·10-5 |
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|
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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. |
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Ribeiro et al. Nutrition Journal 2011 10:47 doi:10.1186/1475-2891-10-47 |
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