GB 28335-2012The food additive. 2-methylbutyrate (English PDF)

1 Scope

This standard applies to 2-methyl butyric acid and ethanol as raw materials prepared by the food additive 2-methyl butyrate.

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 Color and colorless State liquid Place the sample in a colorimetric tube with visual inspection Observation of law Aroma fragrance - fragrant, apple - like 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 2-methyl butyrate content, w /% >= 95.0 Appendix A Acid value (in KOH)/(mg/g) <= 2.0 GB/T 14455.5 Refractive index (20 ° C) 1.393 ~ 1.400 GB/T 14454.4 Relative density (25 °C/25 °C) 0.863 ~ 0.870 GB/T 11540 Appendix A Determination of ethyl ethyl 2 - methyl butyrate 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 2-Methyl Butyrate Typical Gas Chromatography (Area Normalization) See Appendix B.

Appendix B

Food additive 2 - methyl ethyl butyrate Typical gas chromatogram (Area normalization method) B.1 Food Additive 2-Butyl Butyrate Typical Gas Chromatography Food additives 2-methyl ethyl butyrate Typical gas chromatograms are shown in Figure B.1.

Figure B.1 Food additive 2-methyl ethyl butyrate Typical gas chromatogram

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

B.2.2 Stationary phase. Polyethylene glycol.

B.2.3 Film thickness. 0.25 µm.

B.2.4 Chromatographic furnace temperature. linear program temperature from 120 °C ~ 180 °C, the rate of 5 °C/min, and then from 180 °C ~ 230 °C, the rate 10 ° C/min, and finally at 230 ° C for 10 min.

B.2.5 Inlet temperature. 240 ° C.

B.2.6 Detector temperature. 240 ° C.

B.2.7 Detector. Hydrogen flame ionization detector.

B.2.8 Carrier gas. nitrogen.

B.2.9 Carrier gas flow rate. 1.5 mL/min.

B.2.10 Injection volume. 0.2 µL.

B.2.11 Split ratio. 1/10.