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Copper/determination
2
Food dye/complexation
2
Indigo carmine
2
Metal sequestration
2
Spectrophotometric analysis
2
alkalinity
2
buffer
2
carbonic acid
2
chemical analysis
2
chemical interaction
2
chemical structure
2
cobalt
2
complex formation
2
copper ion
food dye
2
gluconate copper
2
nickel
2
pH
2
spectrophotometry
2
stoichiometry
2
zinc ion
2
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