GB 28355-2012Food additive methyl salicylate (methyl salicylate) (English PDF)

1 Scope

This standard applies to salicylic acid and methanol as raw materials prepared by the food additives methyl salicylate (methyl salicylate).

2 Chemical name, molecular formula, structural formula and relative molecular mass

3 Technical requirements

3.1 sensory requirements. should be consistent with the provisions of Table 1.

Table 1 sensory requirements

The project requires a test method Colorless to pale yellow State liquid Place the sample in a colorimetric tube with a visual method Observed Aroma characteristic of holly aroma GB/T 14454.2

3.2 Physical and chemical indicators. should be consistent with the provisions of Table 2.

Table 2 Physical and chemical indicators

Item Index Test Method Methyl salicylate content, w /% >= 98.0 Appendix A Acid value (in KOH)/(mg/g) <= 2.0 GB/T 14455.5 Refractive index (20 ° C) 1.534 ~ 1.538 GB/T 14454.4 Relative density (25 °C/25 °C) 1.176 ~ 1.185 GB/T 11540 Appendix A Determination of methyl 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 Methyl salicylate Typical gas chromatograms (area normalization) See Appendix B.

Appendix B

Food additives - Salicylic acid methyl esters - Typical gas chromatograms (Area normalization method) B.1 Food Additive Salicylic acid methyl ester Typical gas chromatogram Food additives Salicylic acid methyl ester Typical gas chromatograms are shown in Figure B.1.

Figure B.1 Typical additive for food additive salicylate

B.2 Operating conditions B.2.1 Column. capillary column, length 30m, inner diameter 0.32mm.

B.2.2 Stationary phase. (5% phenyl) methylpolysiloxane.

B.2.3 Film thickness. 0.25 µm.

B.2.4 Chromatographic furnace temperature..200 °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.