Radon in water measurements by sampling with sunflower oil.

A novel method for measuring radon in water is proposed. This method involves sampling radon from water into sunflower oil and subsequently measuring the radon in the oil using either Cherenkov counting or Liquid Scintillation (LS) counting. The high partition coefficient of radon between oil and water enables radon preconcentration in the oil, significantly improving the Minimum Detectable Activity Concentration (MDAC) compared to direct Cherenkov or LS measurements in water.