OMA Protocol Review: OMAMAN-56 Sulfites in Shrimp

68 66 67 69

67.0

4

C1

M1

B5

1.41 2.11

68.0

6

C1

M1

B6

1.41 2.08

Biofish Reagent Stability

0 20 40 60 80

0

1

2

3

4

5

6

7

Biofish Results (ppm)

Time (months)

Figure 12. 6-month stability plot

The results of the 30-day stability of the Biotest electrode are shown in Table 14. The GLM results obtained showed a significant difference between results on day 5 and day 30. It is observed that the day 5 results were slightly lower than the rest of the evaluated days and the day 30 results were slightly higher than the rest of evaluated days. However, GLM analysis showed that there were no significant differences between day 5 and day 30 when compared to the rest of the evaluated days. A plot of the stability data indicated no trend over time (Figure 13). Nor were there significant differences between the different lots of biotest evaluated at day 2 of the study.

Table 14. Lot-to-lot results and 30-day stability for the Biotest electrode

CALIBRATION KIT (DIFFERENT LOTS EVERY DAY)

MEASUREMENT KIT (DIFFERENT LOTS EVERY DAY)

BIOTEST (LOTS)

BIOFISH RESULTS

STUDY TIME (DAYS)

AVERAGE

S r

RSD r

68.0

67 69 67 70 70 68 69 67 66 64 65

0

C1

M1

B1

1.41 2.08

70.0

B1

0.00

0

68.5

2

C1

M1

0.71 1.03

B2

66.5

0.71 1.06

B3

64.5

5

C1

M1

B1

0.71 1.10

69.0 2.83 4.10

10

C1

M1

B1

28