{'fraction_non_alphanumeric': 0.022435897435897436, 'fraction_numerical': 0.007478632478632479, 'mean_word_length': 4.783950617283951, '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}}
Determination of uranium in natural waters and high-purity aluminum by flow-injection on-line preconcentration and ICP-MS detection

A flow injection method has been developed for the determination of uranium in natural waters and high-purity aluminum by use of on-line preconcentration on a U/TEVA column and ICP-MS detection. The sample solution prepared as a nitric acid solution in 3 mol l was passed through the U/TEVA column to collect uranium and uranium adsorbed was eluted with 0.1 mol l nitric acid. The effluent was introduced directly into the nebulizer of the ICPMS and U was measured. The detection limit, calculated as 3-times the standard deviation of the background noise, was 3 pg and the sample throughput was about 10 per hour. The proposed method was successfully applied to the determination of uranium in river-water reference materials, a seawater reference material and high-purity aluminum reference materials.