Laboratory Techniques & Safety Flashcards

Which booth wall color is generally recommended for sensory test booths?

Answer: Neutral off-white or light gray

Neutral, matte light colors avoid influencing sample appearance and reduce distraction.

How should sample holding time between preparation and serving be managed?

Answer: Standardize and document a maximum holding time for all samples

Standardized holding times prevent quality changes like staling or oxidation from differing across samples.

In a sensory lab, which practice best prevents cross-contamination from allergenic ingredients?

Answer: Dedicated or thoroughly sanitized utensils and clearly labeled allergen handling

Dedicated or properly sanitized equipment and clear labeling are key allergen control measures.

What is the main function of a pass-through hatch between the preparation area and booth?

Answer: Delivering samples without the panelist seeing the preparation area or staff

Hatches let samples be served discreetly, minimizing visual cues and social interaction.

Why are panelists typically asked to avoid smoking, eating, or drinking coffee for about 30-60 minutes before a session?

Answer: To avoid residual tastes and odors that reduce sensitivity

Recent strong stimuli leave residual flavors and adapt receptors, lowering sensitivity.

Which cleaning agent practice is recommended for sensory glassware?

Answer: Unscented detergent followed by thorough rinsing with odor-free water

Unscented detergents and thorough rinsing prevent residual odors that could taint samples.

An evaluation uses raw ground meat samples; what is the most important food safety requirement?

Answer: Cook to a safe internal temperature verified with a calibrated thermometer

Cooking to a verified safe internal temperature (e.g., 160°F for ground beef) protects panelists from pathogens.