{'fraction_non_alphanumeric': 0.02463768115942029, 'fraction_numerical': 0.036231884057971016, 'mean_word_length': 4.905982905982906, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A rapid field extraction method for determination of radon‐222 in natural waters by liquid scintillation counting

A simple and robust method for determination of 222Rn in natural waters is described. A 1.3‐L water sample is collected in a plastic (PET) water bottle and shaken with 20 mL mineral oil scintillant for 4 minutes. Radon preferentially migrates to the mineral oil, and the 222Rn activity is determined by counting 222Rn and the short‐lived daughter products 214Po and 218Po using an ultra‐low‐level LS counter via α/β separation technique. The PET method achieves a detection limit of ~3 mBq L−1, making it an ideal method for analysis of surface water and groundwater samples.