OMA Protocol Review: OMAMAN-56 Sulfites in Shrimp

range)

High Level

OMA 3 Day 1

138

-

-

17.3

12.6

BIOFIS H

5 Day 1/

150

109

12.2

6.2

4.1

Analyst 1

(50- 300

5 Day2/

146

106

8.2

8.5

5.8

Analyst 2

mg/kg range)

RAW SHRIMP HEAD ON

100 150 200

y = 1.0606x + 1.0926 R² = 0.99376

0 50

0

50

100

150

OMA results (mg/kg)

Biofish results (mg/kg)

Figure 10. Graph of mean Biofish results vs OMA results for raw shrimp head on fortified with sodium metabisulfite.

Table 8. Method developer results for boiled shrimp fortified with sodium metabisulfite Level Metho d N Day/Anal yst Result (mg/kg ) Accuracy (%) (mean Biofish /mean OMA )* 100 Bias Biofish mean Biofish - mean OMA ) Sr

RSDr (%) /mean cand

[s r

] x

100 9.8

Low level

OMA 3 Day 1

29

-

-

2.9

BIOFIS H

5 Day 1/

30

102

0.7

2.1

6.9

Analyst 1

(30- 150

5 Day 2/

31

106

1.7

1.5

4.9

Analyst 2

mg/kg range)

Mediu m level 1

OMA 3 Day 1

53

-

-

2.5

4.7

BIOFIS H

5 Day 1/

53

100

0

3.0

5.6

Analyst 1

(30- 150

5 Day 2/

52

98

-1.0

3.6

6.9

Analyst 2

mg/kg range)

21