A method based on the ultrasound-assisted solidification of floating drop microextraction technique was developed for the spectrophotometric and spectrofluorimetric determination of curcumin in turmeric powder. In this work, a small volume of an organic solvent was floated on the surface of an aqueous solution. After sonication, the organic solvent is solidified and separated. The effect of extraction parameters such as type and the volume of organic solvent, temperature, salt addition and exposure time on the extraction recovery was investigated and optimized. Finally, the droplet method - was used for the determination of analyte. Under the optimum extraction conditions, a linear range of 0.006-3 µg ml-1 and a relative standard deviation (RSD) of 2.72% for curcumin were achieved. Detection limits of 7 and 2 ng ml-1 curcumin were obtained for the spectrophotometric and spectrofluometric methods, respectively. The obtained results show that the application of this method can be successful for the analysis of curcumin in turmeric powder samples.
