The method for determining lemon yellow in beverages using UV visible spectrophotometry was established by combining silver nanoparticles with lemon yellow.The optimal measurement conditions were selected through a single factor experiment method,which involved adding 3.0 mL of silver nanoparticle dispersion as the reaction reagent,adjusting the pH of the system to 6.0,reacting at 4℃for 20 minutes,and measuring the absorbance at a wavelength of 400 nm.Further methodological validation has shown that this method has a wide linear range,good linear relationship,and good accuracy and precision,and can be used for the detection of lemon yellow content in beverages.
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