GB 1886.287-2016National Food Safety Standard -- Food Additives -- Ethyl Isovalerate (English PDF)

2.1 Chemical Name

Ethyl 3-methylbutanoate, ethyl 2-methylbutyrate Formula 2.2 C7H14O2

2.3 Formula

Ethyl 3-methylbutanoate, ethyl 2-methylbutyrate

2.4 Molecular Weight

130.19 (according to 2007 international relative atomic mass)

3.1 Sensory requirements

Sensory requirements shall comply with the requirements in Table 1.

Table 1 Sensory requirements

Project requires test methods Color status colorless liquid the sample was placed in a cuvette, visually Was observed After dilution with a Qiang Lie aroma of fruit, wine, apple-like aroma GB/T 14454.2

3.2 Physical and Chemical Indicators

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

Table 2. Physical and chemical indicators

Item Index Test Method Ethyl isovalerate content, w /% >= 98.0 (sum of two isomers) Appendix A Acid number (as KOH)/(mg/g) <= 2.0 GB/T 14455.5 Refractive index (20 °C) 1.395 ~ 1.399 GB/T 14454.4 Relative density (25 °C/25 °C) 0.862 ~ 0.866 GB/T 11540 Appendix A Determination of the content of ethyl isovalerate A.1 instruments and equipment A.1.1 Chromatography. in GB/T 11538-2006 specified in Chapter 5.

A.1.2 Column. capillary column.

A.1.3 Detector. hydrogen flame ionization detector.

A.2 Determination

Area normalization method. Press the GB/T 11538-2006 Determination 10.4.

A.3 repeatability and results are expressed 11538-2006 carried out in accordance with the provisions of 11.4 GB/T , should meet the requirements.

Food additive gas chromatogram of ethyl isovalerate and operating conditions see Appendix B.

Appendix B

Ethyl isovalerate food additive gas chromatography and the operating conditions of FIG.

(Area normalization method) B.1 ethyl isovalerate food additive gas chromatogram Ethyl isovalerate food additive gas chromatography is shown in Figure B.1.

Description.

. 1 --- ethyl 2-methylbutyrate;

2 --- 3-methylbutanoate.

Figure B.1 ethyl isovalerate food additive gas chromatogram

B.2 operating conditions B.2.1 Column. capillary column, length 50m, diameter 0.2mm.

B.2.2 stationary phase. polyethylene glycol 20000.

B.2.3 film thickness. 0.2µm.

B.2.4 chromatographic oven temperature. 80 °C.

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 before the column pressure. 138kPa.

B.2.10 Injection volume. 0.2µL.

B.2.11 split ratio. 100.1.