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'relative': [98], 'standard': [99], 'deviation': [100], '23%,': [102], 'except': [103], 'PCB': [105], '81,': [106], '77,': [107], '126': [108], '169,': [110], 'which': [112, 131], 'the': [116, 135, 142], 'range': [117], '32%-63%.': [119], 'Limits': [120], 'quantitation': [122], 'PCBs': [124], '2': [126], 'or': [127], '10': [128], 'kg-1,': [130], 'set': [133], 'as': [134], 'lowest': [136], 'validated': [137], 'spiked': [139], 'level': [140], 'meeting': [141], 'acceptable': [143], 'accuracy': [144], 'precision.': [146]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W3001862241', 'counts_by_year': [{'year': 2024, 'cited_by_count': 3}, {'year': 2023, 'cited_by_count': 9}, {'year': 2022, 'cited_by_count': 11}, {'year': 2021, 'cited_by_count': 9}, {'year': 2020, 'cited_by_count': 3}], 'updated_date': '2024-09-18T21:33:09.049173', 'created_date': '2020-01-30'}