OMA Protocol Review: OMAMAN-56 Sulfites in Shrimp

Table 7. Recovery of SO 2 in boiled shrimp

Day 1 /Analyst 1 /Device 1

SO 2 theoretical addition (mg/kg)

BIOFISH 300 SUL Mean (mg/kg)

RSD r (%) SO 2 experimental addition (mg/kg)

Recovery (%)

S r

3.0

0.50 0.63 0.67 1.12 0.85 1.10 0.19 0.43 0.54 1.12 1.23 1.09 S r

16.7

0 5

6.79

9.3 5.9 7.5 4.4 4.8

76 83 80 82 80

3.79 8.34

11.34 14.98 19.45 22.90

10 15 20 30

11.98 16.45 19.90

BOILED SHRIMP

Day 2 /Analyst 2 /Device 2

SO 2 theoretical addition (mg/kg)

BIOFISH 300 SUL Mean (mg/kg)

RSD r (%) SO 2 experimental addition (mg/kg)

Recovery (%)

1.54 7.02

12.3

0 5

6.1 4.4 7.1 6.1 4.6

110 107

5.48

12.23 15.76 20.03 23.58

10 15 20 30

10.69 14.22 18.49 22.04

95 92 88

BOILED SHRIMP

Table 8. Recovery of SO 2 in raw shrimp

Day 1 /Analyst 1/ Device 1

SO2 theoretical addition (mg/kg)

BIOFISH 300 SUL Mean (mg/kg)

SO2 experimental addition (mg/kg)

Recovery (%)

RSD r (%)

S r

3.67 7.56

0.24 0.28 0.16 0.24 1.40 1.23 0.48 0.66 0.71 0.98 1.12 1.33 S r

6.5 3.4 1.7 1.5 6.8 5.6

0 5

78 85 86 85 80

3.89 8.54

12.21 16.59 20.72 23.67

10 15 20 25

12,.92 17.05 20.00

RAW HEAD OFF SHRIMP

Day 2 /Analyst 2/ Device 2

SO2 theoretical addition (mg/kg)

BIOFISH 300 SUL Mean (mg/kg)

RSD r (%)

SO2 experimental addition (mg/kg)

Recovery (%)

2.81 8.13

17.1

0 5

8.1 5.5 5.7 5.3 5.4

106 101

5.32

12.89 17.21 21.00 24.54

10 15 20 30

10.08 14.40 18.19 21.73

96 91 87

RAW HEAD OFF SHRIMP

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