Determination of sensory thresholds of Mentha piperita L. essential oil in selected tropical fruit juices and efficacy of sensory accepted concentrations combined with mild heat to inactivate foodborne pathogens

Abstract

Summary This study determined the compromised acceptance threshold (CAT) and rejection threshold (RT) of Mentha piperita L. essential oil (MPEO) in cajá, guava and mango juices. The MPEO concentrations below the RT values were evaluated alone or combined with mild heat treatment (MHT; 54 °C) to inactivate ≥5‐log10 of Escherichia coli O157:H7 and Salmonella Enteritidis PT 4 in the same juices. The CAT of MPEO varied from 0.30 to 0.32 μL mL−1, while the RT was 1.34 or 1.36 μL mL−1 in the tested juices. Only concentrations of MPEO close, or higher than the RT caused ≥5‐log10 reductions in the tested pathogens in cajá, guava and mango juices. Combined with MHT, concentrations of MPEO below the RT reduced ≥5‐log10 of both pathogens in juices. These findings indicate that MPEO concentrations below the RT in combination with MHT is a feasible preservation technology to ensure the safety of tropical fruit juices.

Exploring New and Modified Rejection-Type Thresholds Using Cricket Snack Crackers

“…These affective sensory threshold methods have exhibited a wide range of valuable uses to the food industry, including but not limited to: informing limits on natural preservative use [ 7 ], determining practical sodium reduction levels [ 8 ], and mitigating negative effects of radiation on produce quality [ 9 ]. CRT measures have also been applied to compounds which may be desirable to some consumers at moderate levels, but eventually reach a breakpoint at higher concentrations [ 10 , 11 ], and even to stimuli for which specific lack of sensitivity is sometimes observed [ 11 ].…”