GB 28336-2012Food additives. 2-methyl butyrate (English PDF)

1 Scope

This standard applies to 2-methyl butanol as raw material prepared by the food additive 2-methyl butyric acid.

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 colorless to pale yellow State liquid Place the sample in a colorimetric tube with visual inspection Observation of law Aroma pungent spicy goat cheese aroma, diluted with fruit fruity 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 Solubility (25 ° C) 1 mL The sample was dissolved in 1 mL of 95% by volume ethanol. GB/T 14455.3 2-methyl butyric acid content, w /% >= 98.0 Appendix A Refractive index (20 ° C) 1.404 ~ 1.408 GB/T 14454.4 Relative density (25 °C/25 °C) 0.931 ~ 0.936 GB/T 11540 Appendix A Determination of 2 - methyl butyric acid 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 Butyric Acid Typical Gas Chromatography (Area Normalization) See Appendix B.

Appendix B

Food additive 2 - methyl butyric acid Typical gas chromatogram (Area normalization method) B.1 Food additive 2-methyl butyric acid Typical gas chromatogram Food additives 2-methyl butyric acid Typical gas chromatograms are shown in Figure B.1.

Figure B.1 Food additive 2-methyl butyric acid Typical gas chromatogram

B.2 Operating conditions B.2.1 Column. capillary column, 50m long, inner diameter 0.2mm.

B.2.2 Stationary phase. Polyethylene glycol.

B.2.3 Film thickness. 0.2 µm.

B.2.4 Chromatographic furnace temperature. 150 °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 20 mL/min.

B.2.10 Injection volume. 1 µL.

B.2.11 Split ratio. 1/100.