OMA Protocol Review: OMAMAN-56 Sulfites in Shrimp
Recovery Results of the recovery experiment are presented in Table 12. All recovery values ranged between 80- 110 %, except in the case of raw shrimp head on at 50 mg/kg on day 1/analyst 1 in which the obtained result was 78 % for recovery. However, the same sample measured by analyst 2 on day 2 showed a result of 86 % for recovery.
Table 12. Recovery of sodium metabisulfite by matrix
Known sodium metabisulfite concentration (mg/Kg)
Biofish results (mg/kg)
Recovery (%)
Average (mg/kg)
Matrix
Day and analyst
6 0 0 0 5 0 0 0 0 0
Day 1 Analyst 1
Raw shrimp head off
0
2.2
Day 2 Analyst 2
Raw shrimp head off
0
0.0
41 42 37 40 40 39 42 42 41 40 81 83 84 83 82 81 82 83 83 84
Day 1 Analyst 1
Raw shrimp head off
50
40
80
Day 2 Analyst 2
Raw shrimp head off
50
41
82
Day 1 Analyst 1
Raw shrimp head off
100
83
83
Day 2 Analyst 2
Raw shrimp head off
100
83
83
Raw shrimp head off
250
Day 1
233
237
95
24
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