GB 28357-2012Food additives -- Isoamyl salicylate (salicylic acid isoamyl) (English PDF)

2.1 Chemical name

3-methylbutyl 2-hydroxybenzoate

2.2 Molecular formula

C12H16O3

2.3 Structural formula

2.4 Relative molecular mass

208.26 (according to 2007 International relative atomic mass)

98.0 Appendix A

Acid value (in KOH)/(mg/g) <= 1.0 GB/T 14455.5 Refractive index (20 ° C) 1.504 ~ 1.509 GB/T 14454.4 Relative density (25 °C/25 °C) 1.046 ~ 1.055 GB/T 11540 Appendix A Determination of Isoamyl Salicylate Content A.1 Instruments and equipment A.1.1 chromatograph. according to GB/T 11538-2006 in Chapter 5 of the provisions.

A.1.2 Column. Capillary column.

A.1.3 Detector. Hydrogen flame ionization detector.

A.2 Determination method Area normalization method. according to GB/T 11538-2006 10.4 determination of content.

A.3 repeatability and result representation According to GB/T 11538-2006 11.4 implementation of the provisions.

Food additives Isoamyl salicylate Typical gas chromatograms (area normalization) See Appendix B.

Appendix B

Food additives isoamyl salicylate typical gas chromatogram (Area normalization method) B.1 Food additive Isoamyl salicylate Typical gas chromatogram A typical gas chromatogram of isopropyl amyl salicylate is shown in Figure B.1.

Description.

1 --- 2-methylbutyl salicylate;

2 --- 3-methylbutyl salicylate;

3 --- n-amyl salicylate.

Figure B.1 Typical additives for food additives, isoamyl salicylate

B.2 Operating conditions B.2.1 Column. capillary column, length 50m, inner diameter 0.25mm.

B.2.2 Stationary phase. Polyethylene glycol.

B.2.3 Film thickness. 0.25 µm.

B.2.4 Chromatographic furnace temperature. 180 °C constant temperature.

B.2.5 Inlet temperature. 250 ° C.

B.2.6 Detector temperature. 250 ° C.

B.2.7 Detector. Hydrogen flame ionization detector.

B.2.8 Carrier gas. nitrogen.

B.2.9 Carrier gas flow rate. about 30 mL/min.

B.2.10 Injection volume. 0.2 µL.

B.2.11 Split ratio. 1/75.