Calibrating a refractometer should be performed with which liquid?

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Study for the VTNE Laboratory Procedures Test. Use flashcards and multiple choice questions, each question offers hints and explanations, enabling increased understanding and retention. Prepare effectively for your exam!

Multiple Choice

Calibrating a refractometer should be performed with which liquid?

Explanation:
Calibrating a refractometer relies on a standard with a known refractive index to set the instrument’s baseline. Distilled water is ideal because it has essentially no dissolved solids, giving a stable, well-defined refractive index. Using tap water or biological fluids like plasma or urine would introduce varying solutes that shift the reference point and lead to inaccurate measurements. For best accuracy, calibrate with distilled water at the same temperature as your measurements (since refractive index changes with temperature).

Calibrating a refractometer relies on a standard with a known refractive index to set the instrument’s baseline. Distilled water is ideal because it has essentially no dissolved solids, giving a stable, well-defined refractive index. Using tap water or biological fluids like plasma or urine would introduce varying solutes that shift the reference point and lead to inaccurate measurements. For best accuracy, calibrate with distilled water at the same temperature as your measurements (since refractive index changes with temperature).

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