GB 1886.215-2016Food grade white oil (English PDF)

2.1 Sensory requirements

The sensory requirements shall comply with the provisions of Table 1.

2.2 Physical and chemical indicators

The physical and chemical indicators shall comply with the provisions of Table 2.

Appendix A

Determination of Lead

A.1 Warnings

The reagents used in the test methods of this Standard are toxic or corrosive; and appropriate safety and protective measures should be taken during operation.

A.2 Reagents and materials

A.2.1 Hydrochloric acid.

A.2.2 Glacial acetic acid solution: Take 12mL of glacial acetic acid and dilute to 100mL of water.

A.2.3 Other reagents are the same as GB 5009.12.

A.3 Apparatus

A.3.1 High temperature furnace: The temperature can be controlled at 450°C~550°C.

A.3.2 Electric constant temperature water bath.

A.4 Determination method

Take about 2g of specimen, accurate to 0.0002g; put it in a porcelain crucible; place it on an electric furnace, heat slowly in a fume hood until carbonized. Then transfer it to a high- temperature furnace; and make it completely ash at 450°C~550°C. The ashing time shall be no less than 2h; cool to room temperature; add 2mL hydrochloric acid and evaporate to dryness on an electric constant temperature water bath. Add 2mL of glacial acetic acid solution to dissolve the residue; transfer all to a 100mL volumetric flask; dilute with water to the mark; shake well;

then take solution as the specimen solution.

Determine the lead in the sample solution according to GB 5009.12. If the determination result exceeds the range of the curve; dilute the sample solution for measurement and calculation.

NOTE: During the heating process, the specimen shall be prevented from overflowing the crucible due to volume expansion and combustion.

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