Liquid - liquid extraction combined with atomic-absorption spectrometry for determination of copper in water, foods and analytical reagents using 1,2-naphthoquinone thiosemicarbazone.
D003300:Copper / Q000032:analysis*; D005504:Food Analysis / Q000379:methods*; D007202:Indicators and Reagents / Q000032:analysis*; D009285:Naphthoquinones; D013054:Spectrophotometry, Atomic / Q000379:methods; D014881:Water Supply / Q000032:analysis*
D007202:Indicators and Reagents; D009285:Naphthoquinones; D003300:Copper; C034074:1,2-naphthoquinone thiosemicarbazone