GB 31627-2014National Food Safety Standard -- Food Additives -- Carvacrol (English PDF)

2.1 Chemical Name

2-methyl-5-isopropyl phenol.

Formula 2.2

C10H14O

2.3 Formula

2.4 Molecular Weight

150.22 (according to 2007 international relative atomic mass).

3.1 Sensory requirements

Shall comply with the requirements in Table 1.

Table 1 Sensory requirements

Project requires test methods Color status Colorless to pale yellow liquid the sample was placed in a cuvette, were visually observed Aroma Thyme like spicy and grassy aroma GB/T 14454.2

3.2 Physical and Chemical Indicators

Shall be in accordance with Table 2.

Table 2. Physical and chemical indicators

Item Index Test Method Carvacrol content (w) /% >= 98 Appendix A Refractive index (20 °C) 1.521 ~ 1.528 GB/T 14454.4 Relative density (25 °C/25 °C) 0.974 ~ 0.979 GB/T 11540 Appendix A Carvacrol Content Determination 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.

Carvacrol food additives typical gas chromatogram (area normalization method) Appendix B.

Appendix B

Food additives typical gas chromatogram carvacrol (Area normalization method) B.1 food additives typical gas chromatogram carvacrol A typical gas chromatogram of food additives carvacrol Figure B.1.

Figure B.1 food additives typical gas chromatogram carvacrol

B.2 operating conditions B.2.1 Column. capillary column, 60m × 0.25mm. Or other equivalent column.

B.2.2 stationary phase. bonding/cross-linked polyethylene glycol.

B.2.3 film thickness. 0.25µm.

B.2.4 chromatographic oven temperature.200 °C.

B.2.5 Inlet temperature. 250 °C.

B.2.6 Detector temperature. 280 °C.

B.2.7 Detector. hydrogen flame ionization detector.

B.2.8 Carrier gas. nitrogen purity of 99.99% or more.

B.2.9 carrier gas flow rate. 1.0mL/min.

B.2.10 Injection volume. 0.2µL.

B.2.11 Split ratio. 100.