GB 28365-2012Food additives -- 4-hydroxy-2, 5-dimethyl-3 (2H) furanone (English PDF)

1 Scope

This standard is applicable to food additives made from ethyl lactate or 1,2-propanediol as starting materials. 4-hydroxy-2,5-dimethyl-3 (2H) Ketone.

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 white to pale yellow State solid Place the specimen on a clean white paper with visual inspection Observation of law Aroma aroma, caramel flavor or coke pineapple - 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 4-hydroxy-2,5-dimethyl-3 (2H) furanone content, w /% >= 98.0 Appendix A Melting point/°C 75.0 ~ 80.0 GB/T 14457.3 Appendix A Determination of 4 - hydroxy - 2,5 - dimethyl - 3 (2H) furanone 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.

Sample Preparation. Weigh this product 1g dissolved in 5mL 95% (volume fraction) of ethanol, shake well standby.

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

Food additive 4-hydroxy-2,5-dimethyl-3 (2H) furanone Typical gas chromatogram (area normalization) See Appendix B.

Appendix B

Food additive 4-hydroxy-2,5-dimethyl-3 (2H) furanone Typical gas chromatogram (Area normalization method) B.1 Food additive 4-hydroxy-2,5-dimethyl-3 (2H) furanone Typical gas chromatogram Food additives 4-hydroxy-2,5-dimethyl-3 (2H) furanone Typical gas chromatograms are shown in Figure B.1.

Description.

1 --- solvent;

2 --- 4-hydroxy-2,5-dimethyl-3 (2H) furanone.

Figure B.1 Food additive 4-hydroxy-2,5-dimethyl-3 (2H) furanone Typical gas chromatogram

B.2 Operating conditions B.2.1 Column. capillary column, length 30m, diameter 0.53mm.

B.2.2 Stationary phase. Polyethylene glycol.

B.2.3 Film thickness. 1.0 µm.

B.2.4 chromatographic furnace temperature. 80 °C constant temperature 1min, and then linear program temperature from 80 °C ~ 220 °C, the rate of 10 °C/min, and finally 220 °C constant temperature 10min.

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 Pre-column pressure. 0.06MPa ~ 0.07MPa.

B.2.10 Injection volume. about 0.2 µL.

B.2.11 Split ratio. 1/100.