GB 29980-2013Food additive -- Allyl isothiocyanate (English PDF)

2.1 Chemical Name

Allyl isothiocyanate Formula 2.2 C4H5NS

2.3 Formula

2.4 Relative molecular mass

99.15 (according to 2007 international relative atomic mass)

3.1 Sensory requirements

Sensory requirements shall comply with the requirements of Table 1.

Table 1 Sensory requirements

Project requires test methods Colorless to pale yellow color of the sample was placed inside color than the tube, were visually observed Liquid state Very spicy aroma pungent odor GB/T 14454.2 a be assessed when a propylene glycol required samples were diluted 100-fold.

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 Allyl isothiocyanate content, w /% >= 98.0 Appendix A Acid value (in dollars KOH)/(mg/g) <= 1.0 GB/T 14455.5a Refractive index (20 °C) 1.524 ~ 1.532 GB/T 14454.4 the relative density (25 °C/25 °C) 1.013 ~ 1.020 GB/T 11540 a indicator phenol red indicator solution.

Appendix A

Determination of allyl isothiocyanate content A.1 instruments and equipment A.1.1 chromatograph. According to GB/T 11538-2006 provisions in Chapter 5.

A.1.2 Column. capillary column.

A.1.3 Detector. Hydrogen flame ionization detector.

A.2 Determination

Area normalization method. According to GB/T 11538-2006 10.4 Determination.

A.3 repeatability and results are shown According to GB/T 11538-2006 provisions in 11.4, shall comply with the requirements.

Food Additives allyl isothiocyanate gas chromatograph (area normalization method) See Appendix B.

Appendix B

Food Additives allyl isothiocyanate gas chromatogram (Area normalization method) B.1 food additives allyl isothiocyanate gas chromatogram

Figure B.1.

B.1 food additives allyl isothiocyanate gas chromatogram B.2 operating conditions B.2.1 Column. capillary column, length 30 m, an inner diameter of 0.32 mm.

B.2.2 stationary phase. 5% diphenyl-95% dimethylpolysiloxane.

B.2.3 film thickness. 1.0 µm.

B.2.4 chromatography oven temperature. 80 °C constant temperature 3 min; then linear temperature programmed from 80 °C ~ 250 °C, the rate of 18 °C/min; and finally 250 °C thermostat 5 min.

B.2.5 inlet temperature. 230 °C.

B.2.6 detector temperature. 280 °C.

B.2.7 Detector. Hydrogen flame ionization detector.

B.2.8 carrier gas. nitrogen.

B.2.9 pre-column pressure. 96 kPa.

B.2.10 Injection volume. 0.1 µL.

B.2.11 split ratio. 50︰1.