{"id":"https://openalex.org/W1985759773","doi":"https://doi.org/10.1080/00387019808006771","title":"Colorimetric and Spectrofluorimetric Methods for the Determination of Melatonin in Tablets and Serum","display_name":"Colorimetric and Spectrofluorimetric Methods for the Determination of Melatonin in Tablets and Serum","publication_year":1998,"publication_date":"1998-01-01","ids":{"openalex":"https://openalex.org/W1985759773","doi":"https://doi.org/10.1080/00387019808006771","mag":"1985759773"},"language":"en","primary_location":{"id":"doi:10.1080/00387019808006771","doi":"https://doi.org/10.1080/00387019808006771","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00387019808006771","pdf_url":null,"source":{"id":"https://openalex.org/S37186612","display_name":"Spectroscopy Letters","issn_l":"0038-7010","issn":["0038-7010","1532-2289"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-d","jufo-1","norway-1","poland-20","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Spectroscopy Letters","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5042564235","display_name":"Azza Abdel-Kader Gazy","orcid":"https://orcid.org/0000-0002-0361-7503","observed_orcids":["https://orcid.org/0000-0002-0361-7503"]},"institutions":[{"id":"https://openalex.org/I84524832","display_name":"Alexandria University","ror":"https://ror.org/00mzz1w90","country_code":"EG","type":"education","lineage":["https://openalex.org/I84524832"]}],"countries":["EG"],"is_corresponding":false,"raw_author_name":"Azza A. Gazy","raw_affiliation_strings":["Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt","institution_ids":["https://openalex.org/I84524832"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063072903","display_name":"Heba H. Abdine","orcid":"https://orcid.org/0000-0001-9989-6078","observed_orcids":["https://orcid.org/0000-0001-9989-6078"]},"institutions":[{"id":"https://openalex.org/I84524832","display_name":"Alexandria University","ror":"https://ror.org/00mzz1w90","country_code":"EG","type":"education","lineage":["https://openalex.org/I84524832"]}],"countries":["EG"],"is_corresponding":false,"raw_author_name":"Heba H. Abdine","raw_affiliation_strings":["Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt","institution_ids":["https://openalex.org/I84524832"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5076224776","display_name":"Mohamed H. Abdel\u2010Hay","orcid":"https://orcid.org/0000-0002-6074-1375","observed_orcids":["https://orcid.org/0000-0002-6074-1375"]},"institutions":[{"id":"https://openalex.org/I84524832","display_name":"Alexandria University","ror":"https://ror.org/00mzz1w90","country_code":"EG","type":"education","lineage":["https://openalex.org/I84524832"]}],"countries":["EG"],"is_corresponding":false,"raw_author_name":"Mohammed H. Abdel-Hay","raw_affiliation_strings":["Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt","institution_ids":["https://openalex.org/I84524832"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I84524832"],"apc_list":null,"apc_paid":null,"fwci":0.9172,"has_fulltext":false,"cited_by_count":22,"citation_normalized_percentile":{"value":0.64699929,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":95},"biblio":{"volume":"31","issue":"1","first_page":"177","last_page":"197"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11460","display_name":"Analytical Methods in Pharmaceuticals","score":0.9980000257492065,"subfield":{"id":"https://openalex.org/subfields/1602","display_name":"Analytical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11460","display_name":"Analytical Methods in Pharmaceuticals","score":0.9980000257492065,"subfield":{"id":"https://openalex.org/subfields/1602","display_name":"Analytical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10342","display_name":"Circadian rhythm and melatonin","score":0.0017000000225380063,"subfield":{"id":"https://openalex.org/subfields/2807","display_name":"Endocrine and Autonomic Systems"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10180","display_name":"Analytical chemistry methods development","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1602","display_name":"Analytical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/melatonin","display_name":"melatonin","score":0.9190000295639038},{"id":"https://openalex.org/keywords/colorimetric-determination","display_name":"colorimetric determination","score":0.9129999876022339},{"id":"https://openalex.org/keywords/fluorometric-detection","display_name":"fluorometric determination","score":0.9490000009536743},{"id":"https://openalex.org/keywords/serum-melatonin-levels","display_name":"serum melatonin","score":0.8799999952316284},{"id":"https://openalex.org/keywords/p-dimethylaminobenzaldehyde","display_name":"p-dimethylaminobenzaldehyde","score":0.9200000166893005},{"id":"https://openalex.org/keywords/ferric-chloride","display_name":"ferric chloride","score":0.871999979019165},{"id":"https://openalex.org/keywords/o-phthalaldehyde","display_name":"o-phthalaldehyde","score":0.9319999814033508},{"id":"https://openalex.org/keywords/pyridoxine","display_name":"pyridoxine","score":0.796999990940094},{"id":"https://openalex.org/keywords/drug-quantification","display_name":"pharmaceutical analysis","score":0.4699999988079071}],"concepts":[{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.973913311958313},{"id":"https://openalex.org/C2778182776","wikidata":"https://www.wikidata.org/wiki/Q180912","display_name":"Melatonin","level":2,"score":0.8800712823867798},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.6848239302635193},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.10530292987823486},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1080/00387019808006771","doi":"https://doi.org/10.1080/00387019808006771","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00387019808006771","pdf_url":null,"source":{"id":"https://openalex.org/S37186612","display_name":"Spectroscopy Letters","issn_l":"0038-7010","issn":["0038-7010","1532-2289"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-d","jufo-1","norway-1","poland-20","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Spectroscopy Letters","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","display_name":"Good health and well-being","score":0.4000000059604645}],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320308269","display_name":"Alexander von Humboldt-Stiftung","ror":"https://ror.org/012kf4317"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W1498642865","https://openalex.org/W1576741681","https://openalex.org/W1964872316","https://openalex.org/W1965304190","https://openalex.org/W1975603349","https://openalex.org/W1980483044","https://openalex.org/W1989938544","https://openalex.org/W1992941296","https://openalex.org/W2013551886","https://openalex.org/W2023381435","https://openalex.org/W2050990229","https://openalex.org/W2060671575","https://openalex.org/W2083014950","https://openalex.org/W2147223332","https://openalex.org/W2160420287","https://openalex.org/W2787787680","https://openalex.org/W7057863570"],"related_works":["https://openalex.org/W2010744162","https://openalex.org/W2984591419","https://openalex.org/W2062317156","https://openalex.org/W2013180203","https://openalex.org/W2612556362","https://openalex.org/W64264946","https://openalex.org/W2097087778","https://openalex.org/W7213380356","https://openalex.org/W2388551565","https://openalex.org/W2063565962"],"abstract_inverted_index":{"Two":[0],"sensitive":[1],"and":[2,5,17,96,110,126,148,177],"accurate":[3],"colorimetric":[4,132,175],"spectrofluonmetric":[6],"methods,":[7],"are":[8,170],"presented":[9],"for":[10,124,128,146,150,174,181],"the":[11,23,44,59,97,100,139,154,160],"determination":[12,162],"of":[13,25,43,61,99,163],"melatonin":[14,62,108,164],"in":[15,27,34,65,165],"tablets":[16,106,118,130],"serum.":[18,166],"The":[19,40,53,167],"first":[20],"method":[21,55,138,176],"utilizes":[22],"reactions":[24],"p-dimethylaminobenzaldehyde":[26],"hydrochloric":[28],"acid":[29,36,66],"(van":[30],"Urk":[31],"reagent)-ferric":[32],"chloride":[33],"sulphuric":[35],"(Salkowski":[37],"reagent)":[38],"mixture.":[39],"blue":[41],"color":[42],"resulting":[45],"reaction":[46,60],"product":[47,73],"is":[48,56,75],"measured":[49,76],"at":[50,77,86],"630":[51],"nm.":[52,88],"second":[54],"based":[57],"on":[58],"with":[63,112],"o-phthalaldehyde":[64],"medium":[67],"which":[68],"yields":[69],"highly":[70],"fluorescent":[71],"condensation":[72],"that":[74],"465":[78],"nm":[79],"as":[80],"emission":[81],"wavelength,":[82],"using":[83,131],"excitation":[84],"wavelength":[85],"355":[87],"No":[89],"interference":[90],"was":[91,102],"observed":[92],"from":[93,117],"tableting":[94],"additives,":[95],"applicability":[98],"methods":[101,156],"examined":[103],"by":[104,135],"analysing":[105],"containing":[107],"(single":[109],"combined":[111,129,151],"pyridoxine).":[113],"Mean":[114],"percentage":[115],"recoveries":[116,140],"were":[119,141,157],"found":[120,142],"to":[121,143,159],"be":[122,144],"99.9+0.31":[123],"single":[125,147],"100.5+0.15":[127],"method,":[133],"while":[134],"applying":[136],"spectrofluorimetric":[137,182],"100.610.41":[145],"100.2+0.39":[149],"tablets.":[152],"Furthermore,":[153],"proposed":[155],"extended":[158],"in-vitro":[161],"detection":[168],"limits":[169],"0.27":[171],"ug":[172,179],"ml\u22121":[173,180],"0.00035":[178],"method.":[183]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":2},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1}],"updated_date":"2026-10-30T12:39:25.321706","created_date":"2016-06-24T00:00:00"}