Resuspension Calculator

The core principle of resuspension relies on the fundamental conservation of mass and solution stoichiometry. When you have a specific quantity of a substance (the given amount) and you need to achieve a specific target concentration (the desired concentration), you determine the required liquid volume by dividing the given quantity by the desired concentration. The standard formula used is: Volume = Given / Desired. Ensuring that your units match—such as converting micrograms to nanograms or micromoles to nanomoles—is critical for obtaining accurate volumetric outputs.

Imagine you have received a synthesized DNA oligonucleotide pellet containing a given amount of 3,200 nanomoles of dried powder. Your experimental protocol requires you to prepare a stock solution with a desired concentration of 1,600 micromolar (which equals 1,600 nanomoles per microliter, or 1.6 nmol/uL). To find the exact volume of buffer to add, apply our formula: Volume = Given / Desired. Dividing 3,200 nmol by 1,600 nmol/uL yields exactly 2.0 microliters of diluent. Adding this precise volume to your tube completely resuspends the pellet into your target concentration.

Always centrifuge your sample tube briefly before adding any liquid to ensure the dried pellet rests securely at the bottom of the vessel. Use molecular-grade water or a specialized buffered solution like TE or Tris-HCl, depending on the chemical stability and downstream application of your sample. Finally, allow sufficient incubation time and gently pipette up and down or vortex thoroughly to achieve a completely homogenous solution.