GB/T 14454.4 - 2008 provides a specification for the determination of the refractive index of fragrances. It is based on the principle of refraction and specifies the method for measuring the refractive index of fragrances. Clarify the accuracy and technical parameters of the required Abbe refractometer and other instruments to ensure accurate measurement. Detail the preparation of the fragrance sample to ensure its purity and representativeness. Standardize the measurement process, covering instrument calibrating, sample measurement operation and data processing, accurate to the last four decimal places. Through this standard, the refractive index of fragrances can be accurately obtained, providing key data support for fragrance quality control, authenticity identification and Product Research & Development, and helping the standardization development of the fragrance industry.