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. Author manuscript; available in PMC: 2009 Mar 18.
Published in final edited form as: J AOAC Int. 2005;88(5):1279–1291.

Table 2.

β-Carotene standard purity determinations

Laboratory Spectrophotometric
purity, %
LC purity, % Total purity at
time of injection
for calibration, %
1 88.33 91.42 80.75
2 97.90 97.50 95.45
3 94.70 98.80 93.76
4 95.84 93.04 89.17
5 86.40 98.07 84.73
6 104.8 95.53 100.12
7 95.00 97.30 92.30
8 96.55 98.28 94.89
9 98.84 96.84 95.72
10 94.59 97.75 92.46
11 87.40 97.80 85.48