GB 28340-2012National food safety standards Food Additives -- 3-Methylthiopropanol (English PDF)

1 Scope

This standard applies to acrolein as raw material or propylene alcohol and methyl mercaptan as raw material prepared by the food additive 3 - methylthiopropanol.

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 cang yellow State liquid the sample was placed in a colorimetric tube and visually observed A strong aroma of sweetness, soup or meat - 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 3-methylthiopropanol content, w /% >= 98.0 Appendix A Refractive index (20 ° C) 1.483 ~ 1.493 GB/T 14454.4 Relative density (25 °C/25 °C) 1.023 ~ 1.029 GB/T 11540 Appendix A Determination of 3 - methylthiopropanol 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 Additive 3-Methylthiopropanol Typical Gas Chromatography (Area Normalization) See Appendix B.

Appendix B

Food additive 3 - methylthiopropanol Typical gas chromatogram (Area normalization method) B.1 Food Additive 3-Methylthiopropanol Typical Gas Chromatography Food additives 3-methylthiopropanol Typical gas chromatograms are shown in Figure B.1.

Figure B.1 Food additive 3-methylthiopropanol Typical gas chromatogram

B.2 Operating conditions B.2.1 Column. capillary column, length 30m, inner diameter 0.25mm.

B.2.2 Stationary phase. Polyethylene glycol.

B.2.3 Film thickness. 0.25 µm.

B.2.4 Chromatographic furnace temperature. 160 °C constant temperature 10min, and then linear temperature from 160 °C ~.200 °C, the rate of 10 °C/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 Pre-column pressure. 70 kPa.

B.2.10 Injection volume. 0.2 µL.

B.2.11 Split ratio. 1/100.