mLmin

mL/min, written as milliliters per minute, is a unit of volumetric flow rate representing the amount of liquid that passes through a point in one minute. It is a widely used derived unit in laboratory instrumentation and medical devices, and is sometimes denoted as mL·min−1.

Common applications include chromatography, where the flow of the mobile phase through a column is specified in mL/min to control separation performance and system pressure. The unit also appears in medical contexts such as intravenous infusion pumps, dialysis equipment, and fluid-handling microfluidic systems, where precise and repeatable delivery rates are essential. In many cases, mL/min is preferred for practicality and familiarity in laboratory and clinical settings; for larger or smaller systems, it may be converted to L/min or L/h as needed.

Conversions and relationships: 1 mL/min equals 0.001 L/min, or 0.06 L/h, and 60 mL/h. In terms of per-second rate, 1 mL/min is approximately 0.0167 mL/s. When comparing systems or recording data, it is important to maintain consistent units to avoid errors in flow calculations, residence times, or dosing.

Measurement and interpretation: Flow rates are determined by pumps, injectors, or flow meters and are influenced by system pressure, viscosity, and tubing or column dimensions. While mL/min is common in many contexts, SI-compatible alternatives include L/min or m^3/s, with appropriate conversions used as needed. See also flow rate and related units like L/min.

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