Table 1.

Percent recovery vitamin B-2 for repeated samples for evaluation.

Test sample	Molarity	Molarity by standard curve	Percent recovery
1	3.49 × 10−5	3.46 × 10−5	99.2
2	3.49 × 10−5	3.48 × 10−5	99.7
3	3.49 × 10−5	3.48 × 10−5	99.7
4	3.49 × 10−5	3.43 × 10−5	98.3
5	3.49 × 10−5	3.51 × 10−5	101
6	3.49 × 10−5	3.46 × 10−5	99.2
7	3.49 × 10−5	3.51 × 10−5	101
8	3.49 × 10−5	3.51 × 10−5	101
9	3.49 × 10−5	3.49 × 10−5	100
10	3.49 × 10−5	3.54 × 10−5	101
11	3.49 × 10−5	3.51 × 10−5	101
12	3.49 × 10−5	3.51 × 10−5	101
13	8.51 × 10−5	8.45 × 10−5	99.3
14	8.51 × 10−5	8.61 × 10−5	101
15	8.51 × 10−5	8.53 × 10−5	100
16	8.51 × 10−5	8.25 × 10−5	97
17	8.51 × 10−5	8.61 × 10−5	101
18	8.51 × 10−5	8.45 × 10−5	99.3
19	8.51 × 10−5	8.45 × 10−5	99.3
20	8.51 × 10−5	8.61 × 10−5	101
21	8.51 × 10−5	8.61 × 10−5	101
22	8.51 × 10−5	8.53 × 10−5	100
23	8.51 × 10−5	8.61 × 10−5	101
24	8.51 × 10−5	8.45 × 10−5	99.3