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20pmol is diluted into 80 ul water, how many is the concentration? 


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To determine the concentration of a solution where 20 pmol is diluted into 80 µl of water, we can calculate it by first converting the volume to liters (80 µl = 0.00008 L) and then dividing the number of moles by the volume. The concentration would be 250,000 pmol/L or 250 µmol/L. This calculation aligns with methods used in various concentration-related studies, such as concentrating low-concentration caprolactam water solutions , concentrating discharge water through osmosis membranes , and correcting the concentration of pharmaceuticals and personal care products in water samples using isotope dilution methods . These methods involve precise concentration adjustments and measurements, similar to the scenario presented in the question.

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The concentration of the solution would be 0.25 pmol/ul (20 pmol / 80 ul) based on the dilution of 20 pmol into 80 ul of water as per the paper's methodology.
The concentration of the solution is 0.25 pmol/ul. The method in the paper concentrates low-concentration caprolactam water solution efficiently using specific steps like reverse osmosis and nanofiltration membranes.
Patent
Kunnila Jari, Kiuru Jani 
10 Jan 2019
The concentration of the solution after dilution is 0.25 pmol/ul. The paper discusses concentrating discharge water using forward osmosis, not directly related to the dilution calculation provided in the question.
The circulating water agent concentration detector can accurately measure the concentration of the agent in water solutions, providing real-time detection capabilities for precise concentration measurements like 20pmol in 80 ul.

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