Identifier

etd-04292011-112248

Degree

Master of Science (MS)

Department

School of Nutrition and Food Sciences

Document Type

Thesis

Abstract

Applying sodium tripolyphosphate to shrimp may cause excess water absorption and has become a major concern to phosphate producers, the consumer and regulatory agencies, such as, the United States Food and Drug Administration. The objective of this study was to examine Near Infrared (NIR) spectroscopy as a nondestructive and rapid method of detecting shrimp treated with sodium tripolyphosphate solutions of varying concentrations and treatment times. Wild caught Penaeus setiferus and aztecus Louisiana gulf coast shrimp were submerged in distilled water, 2.5% sodium tripolyphosphate (STPP), and 5% sodium tripolyphosphate solutions for 30, 60, 120, 240, 480, 960, 1920 minute time intervals. The total moisture was determined and correlated with the water peaks at 5330 and 7180 cm-1 on the resulting NIR spectra. Mineral analyses performed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) for total phosphorus was intended for comparison with the baseline spectra at 5241 cm-1 for the spectra-structure of P-OH; however, there was not an identifiable trend for phosphorus. Partial least square calibration methods were applied to the spectral analyses to develop prediction models based on the changes in moisture content associated with the sodium tripolyphosphate shrimp treatments. As long as the immersion time is known, the concentration of the sodium tripolyphosphate solution can be determined using the moisture content of the treated shrimp samples. The low standard errors of prediction and validation coupled with recent advances in chemometrics have rendered NIR spectroscopy a viable option for the detection of sodium tripolyphosphate in treated shrimp.

Date

2011

Document Availability at the Time of Submission

Secure the entire work for patent and/or proprietary purposes for a period of one year. Student has submitted appropriate documentation which states: During this period the copyright owner also agrees not to exercise her/his ownership rights, including public use in works, without prior authorization from LSU. At the end of the one year period, either we or LSU may request an automatic extension for one additional year. At the end of the one year secure period (or its extension, if such is requested), the work will be released for access worldwide.

Committee Chair

Lampila, Lucina

Included in

Life Sciences Commons

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