GB 28321-2012Food additives -- Dodecyl ethyl (Ethyl Laurate) (English PDF)

1 Scope

This standard applies to dicarboxylic acid and ethanol as raw materials prepared by the food additive dodecanoic acid ethyl ester (ethyl laurate).

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 Organizational state Oily liquid Place the sample in a colorimetric tube with visual inspection Observation of law Aroma fruity, fragrance 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 is fully dissolved in 9 mL of 80% by volume ethanol. GB/T 14455.3 Ethyl dodecanoate content, w /% >= 98.0 Appendix A Acid value (in KOH)/(mg/g) <= 1.0 GB/T 14455.5 Refractive index (20 ° C) 1.430 ~ 1.434 GB/T 14454.4 Relative density (25 °C/25 °C) 0.858 ~ 0.863 GB/T 11540 Appendix A Determination of ethyl dicarboxylate 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 Dodecanoic Acid Typical Gas Chromatography (Area Normalization) See Appendix B.

Appendix B

Food additive Dodecanoic acid ethyl ester Typical gas chromatogram (Area normalization method) B.1 Food additive Dodecanoic acid ethyl ester Typical gas chromatogram Food additives Dioic acid ethyl ester Typical gas chromatograms are shown in Figure B.1.

Figure B.1 Food additive Dodecanoic acid ethyl ester Typical gas chromatogram

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. 180 °C constant temperature 3min, and then linear program temperature from 180 °C ~ 260 °C, the rate of 8 °C/min, and finally in 260 °C constant temperature 10min.

B.2.5 Inlet temperature. 250 ° C.

B.2.6 Detector temperature. 300 ° C.

B.2.7 Detector. Hydrogen flame ionization detector.

B.2.8 Carrier gas. nitrogen.

B.2.9 Pre-column pressure. 90 kPa.

B.2.10 Injection volume. 0.2 µL.

B.2.11 Split ratio. 1/50.