{"id":"W2062925415","doi":"10.1111/j.1751-908x.2009.00911.x","title":"Comparison of Pb Purification by Anion‐Exchange Resin Methods and Assessment of Long‐Term Reproducibility of Th/U/Pb Ratio Measurements by Quadrupole ICP‐MS","year":2009,"lang":"en","type":"article","venue":"Geostandards and Geoanalytical Research","topic":"Radioactive element chemistry and processing","field":"Chemistry","cited_by":52,"is_retracted":false,"has_abstract":true,"ca_institutions":"Laurentian University","funders":"Canada Research Chairs","keywords":"Chemistry; Reproducibility; Isotope dilution; Sphalerite; Analytical Chemistry (journal); Isotope; Matrix (chemical analysis); Quadrupole; Yield (engineering); Inductively coupled plasma mass spectrometry; Mass spectrometry; Mineralogy; Chromatography; Materials science; Pyrite; Metallurgy","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.009905471,0.0001834288,0.0006004218,0.00007980065,0.0001825771,0.00005881711,0.0002204091,0.0001669275,0.0003666187],"category_scores_gemma":[0.001538191,0.0001648112,0.00006916646,0.000339048,0.0005240006,0.0001401526,0.00009041366,0.0004723803,1.244273e-7],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0001344814,"about_ca_system_score_gemma":0.0002256174,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00009349477,"about_ca_topic_score_gemma":0.000008382294,"domain_scores_codex":[0.9961334,0.0003595889,0.0008249821,0.000873723,0.001407952,0.000400351],"domain_scores_gemma":[0.9973446,0.0004003342,0.0003015028,0.0008472047,0.0009143856,0.0001920398],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.0003345468,0.0005294026,0.05357482,0.001018199,0.00009864107,5.936635e-7,0.0002353529,0.000001488599,0.8496296,0.0001137561,0.001171425,0.0932922],"study_design_scores_gemma":[0.0006915102,0.0002606399,0.02123278,0.0001706686,0.00006553908,0.000001295999,0.000244428,0.0009313534,0.9745665,0.0006188927,0.001072934,0.000143473],"study_design_candidate":"bench_or_experimental","study_design_consensus":"bench_or_experimental","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9316992,0.01231525,0.03251864,0.00183324,0.0000246104,0.0004512961,0.0006551662,0.0000235603,0.02047908],"genre_scores_gemma":[0.994498,0.0003152007,0.004508562,0.000007265378,0.0000347404,0.000008409585,0.0001066959,0.000009989205,0.0005111855],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1249369,"threshold_uncertainty_score":0.6720806,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.1652135459291513,"score_gpt":0.5308288644007566,"score_spread":0.3656153184716053,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}