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A precollaborative study of weight determination methods for quick frozen shrimp
J E Dobson1, F D McClure, A P Rainosek
1U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Technical Services Branch, Gloucester, MA 01930-2298, USA.
Journal of AOAC International
|March 21, 1998
Summary
This study evaluated methods for determining the net weight of glazed shrimp, finding Modified AOAC Method(pb) 967.13 and the Air Thaw Method most accurate for IQF-glazed and block-glazed shrimp.
Area of Science:
- Food Science
- Analytical Chemistry
- Seafood Analysis
Background:
- Accurate net weight determination is crucial for seafood trade and regulation.
- Existing methods for IQF-glazed and block-glazed shrimp require validation for precision and accuracy.
Purpose of the Study:
- To compare the accuracy and precision of AOAC methods with alternative methods for determining the net weight of IQF-glazed and block-glazed shrimp.
- To assess method ruggedness and select candidate methods for collaborative study.
Main Methods:
- Tested AOAC Method 963.18, Water Bath Dip, AOAC Method 967.13, Modified AOAC Methods (mnb, pb), Codex Method, Air Thaw Method.
- Evaluated effects of sodium tripolyphosphate (STP), sieve mesh size, sieve diameter, and weighing procedures on net weight determination.
- Utilized 864 IQF-glazed and 234 block-glazed shrimp samples.
Main Results:
- Modified AOAC Method(pb) 967.13 and the Air Thaw Method demonstrated superior performance for both IQF-glazed and block-glazed shrimp.
- Method ruggedness varied with factors like STP presence and sieve parameters.
Conclusions:
- Modified AOAC Method(pb) 967.13 and the Air Thaw Method are recommended for determining the net weight of IQF-glazed and block-glazed shrimp.
- Further collaborative studies are recommended to validate these methods, alongside official AOAC methods for regulatory compliance.