Improvement of methods for analysing sucrose acetate isobutyrate (SAIB) in soft drinks using GC-FID and evaluating antioxidant effects in the SAIB emulsion system

Abstract

Sucrose acetate isobutyrate SAIB (E444) is a mixture produced by the esterification of sucrose with acetic anhydride and isobutyric anhydride. It is a food additive that is used as an emulsifier in soft drinks. It is difficult to analyse SAIB quantitatively because there are 256 synthesisable structures in the mixture. This study developed an analytical method for SAIB using gas chromatography-flame ionization detection (GC-FID). The pre-treatment of SAIB in soft drinks was performed using a liquid-liquid extraction method, which demonstrated a recovery rate of 107.8 ± 7.2%. In the GC-FID analysis of SAIB, numerous peaks were observed in the chromatogram, and the content of SAIB was calculated as the sum of these peak areas. A series of analytical methods were validated according to International Conference for Harmonization (ICH) guidelines. Accordingly, the applicability of the developed analytical method was confirmed for both domestic and imported soft drinks distributed in Korea. Additionally, in the linoleic acid emulsion, SAIB exhibited better lipid oxidation stability than the natural antioxidant α-tocopherol and had similar efficacy to the synthetic antioxidant butylated hydroxytoluene (BHT). Although SAIB has excellent lipid oxidation stability, it must be used within legal standards according to consumer demand to reduce the use of synthetic materials in processed foods. The validated GC-FID analytical method will enable subsequent monitoring of the distributed products.

Keywords:

• Sucrose acetate isobutyrate
• food additives
• method validation
• gas chromatography-flame ionization detection
• monitoring
• lipid oxidation stability

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education [2017R1D1A3B0602846915]; by the BK21 FOUR (Fostering Outstanding Universities for Research) funded by the Ministry of Education (MOE, Korea) and National Research Foundation of Korea (NRF) [Grant No. 4299990913942]; and by the Basic Science Research Program [NRF-2021R1A6A1A03044242] through the National Research Foundation of Korea (NRF) funded by the Ministry of Education.