GB 8233-1987 Sesame oil

This standard applies to the purchase, sale, allocation, storage, processing and export of commercial sesame oil. GB 8233-1987 Sesame Oil GB8233-1987 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of Chinabzxz.net
Sesame oil
This standard applies to the purchase, sale, allocation, storage, processing and export of commercial sesame oil. Classification
According to the aroma characteristics of sesame oil, it is divided into two categories: Sesame oil: has a strong or significant sesame oil aroma. According to its processing technology, it is divided into the following two types: 1.1
1.1.1 Small mill sesame oil: processed and produced by water substitution method. 1.1.2 Mechanized sesame oil: processed and produced by mechanical method. GB/T8233-
Ordinary sesame oil: light aroma. Processed and produced by general pressing method, leaching method or other methods. Technical requirements
Sesame oil should have the following characteristic constants:
Specific gravity (20/4℃): 0.9126~0.9287. 2.1
2.2Refractive index (20℃): 1.46921.4791. 3
Grade indicators
The grade indicators of various types of sesame oil are shown in Table 1 and Table 2. 3.1
The grade indicators of sesame oil are shown in Table 1.
Sensory indication
Physical and chemical indication
Transparency
Color (Lovibond
Colorimeter, 1 inch slot
Small milled sesame oil≤
【Red H
Mechanical sesame oil≤
Water-swelling and volatile matter, %
Impurities, %
Acid value, mgKOH/g
2The grade indicators of ordinary sesame oil are shown in Table 2.3.1.2
【With strong sesame oil
With obvious sesame oil aroma, no peculiar smell【Oil aroma, no peculiar smellTransparent
Allow slight turbidity
Sensory indication
Physical and chemical indication
Odor, taste
Transparency|| tt||Color (Lovibond
colorimeter, 1 inch slot)
Water-soluble and volatile matter, %
Impurities, %
Acid value, mgKOH/g,
Heating test (280℃)
Soap content, %
"Has the inherent smell and flavor of ordinary sesame oil, no peculiar smell
【Red≤】
"Allow the oil color to darken,
"No precipitate
Note: When the color is lower than yellow 70, record it according to the actual test data. 3.2 All kinds of sesame oil are priced based on grade 2. 3.3 Heating test, small-milled sesame oil has no precipitate, and machine-pressed sesame oil has precipitate. 0.03
Allow slight turbidity
Allow trace Precipitation
The color of the oil shall not turn black
3.4 ​​When there is a dispute over the heating test results of ordinary sesame oil, the content of acetone insoluble matter can be tested: the second-grade oil shall not exceed
3.5 All types of sesame oil shall not be mixed with other edible vegetable oils or non-edible vegetable oils.3.6 Hygiene items shall be implemented in accordance with GB2761-81 "Standard for the Allowable Amount of Aflatoxin B1 in Food" and GB5127-85 "Standard for the Allowable Residue of Dichlorvos, Dimethoate, Malathion and Parathion in Food".4 Inspection methods
4.1 Sampling method
4.1.1 The sampling of barreled sesame oil samples shall be carried out in accordance with GB5524-85 "Sampling and sub-sampling method for inspection of vegetable oils and fats".4.1.2 Bottled sesame oil shall be sampled at a ratio of 1% to 3% Random sampling. 4.2 The determination of moisture and volatiles shall be carried out in accordance with GB5528-85 "Determination of moisture and volatiles in vegetable oils and fats". 4.3 The determination of impurities shall be carried out in accordance with GB552985 "Determination of impurities in vegetable oils and fats". 4.4 The determination of acid value shall be carried out in accordance with GB5530-85 "Determination of acid value in vegetable oils and fats". 4.5 The inspection of transparency, color, odor and taste shall be carried out in accordance with GB5525-85 "Determination of transparency, color, odor and taste in vegetable oils and fats". The heating test shall be carried out in accordance with GB553185 "Heating test for vegetable oils and fats". 4.6 The determination of specific gravity shall be carried out in accordance with GB5526-85 "Determination of specific gravity in vegetable oils and fats". 4.7 4.8 The determination of refractive index shall be carried out in accordance with GB5527-85 "Determination of refractive index in vegetable oils and fats". 4.9 The determination of soap content shall be carried out in accordance with GB5533-85 "Determination of soap content in vegetable oils and fats". 4.10 The determination of other related items shall be carried out in accordance with the relevant methods of GB5535-553985 for the inspection of vegetable oils and fats. 5 Marking, packaging, transportation and storage
5.1 The container of sesame oil shall be clearly marked. Bottled sesame oil shall have a trademark and indicate the weight and date of manufacture.
5.2 The packaging, transportation and storage of sesame oil shall meet safety requirements, ensure quality and quantity, and prevent contamination. Appendix A
Determination method of acetone insoluble matter
(Supplement)
Instruments and test instruments
A.1.1 Balance: 0.0001g;
Electric centrifuge
A.1.3 Centrifuge tube with stopper (if the centrifuge tube is not stoppered, a rubber pad with a diameter slightly larger than the centrifuge tube mouth can be used instead): A.1.4
Leather-tipped pipette;
Reagent bottle and small beaker;
Saturated acetone solution: weigh about 10g of chemically pure phospholipid, put it in a 1000ml reagent bottle, add 1000ml of pure acetone, add a stopper, shake thoroughly for 30min, and open the stopper from time to time to let air. After shaking, phospholipid precipitation should appear at the bottom of the reagent bottle. Filter when using, and the filtrate is the acetone solution of saturated phospholipids. A.2 Determination steps
Take about 10 ml of the mixed sample filtered at 90℃ into a centrifuge tube with known constant weight, put it in a small beaker and weigh it accurately on an analytical balance (accurate to 0.0001g), use a pipette to add 1.0 ml of distilled water to the oil sample, and then preheat it to 6070℃, plug the centrifuge tube tightly, or use a rubber pad to block the tube mouth, then press it tightly with your thumb, hold the tube body with four fingers, and fully oscillate for 1 to 2 minutes to mix the oil and water, scrape the oil on the rubber pad along the tube mouth, and put the fully hydrated oil sample into the centrifuge. Slow down first, wait until the machine runs normally, gradually speed up, adjust to a high speed of 4000 revolutions per minute, keep it for 20 minutes, then stop, pull out the centrifuge tube, use a pipette to suck off the upper clear oil (be careful not to stir the bottom sediment), then wash the sediment and the tube wall with 10 ml of saturated phospholipid acetone solution, centrifuge for 5 minutes, and suck off the acetone solution. Then use 5ml saturated acetone solution to wash in reverse, and use filter paper to check until there is no oil stain. If there is grease spilled outside the tube, wipe it off with absorbent cotton dipped in acetone. Then put the centrifuge tube into the original small beaker, use a hair dryer to dry the residual acetone, put it in a 105℃ oven, and dry it to constant weight (the difference between the two dryings should not exceed 0.0002g). If the latter weight exceeds the previous weight, the previous weight shall prevail. A.3 Result calculation
The content of acetone insoluble matter is calculated as follows:
W——weight of centrifuge tube and sediment, g;
G2——weight of centrifuge tube, g:
W——weight of sample, g. The determination result of acetone insoluble matter is determined by the method of rejection, that is, the average value of two close values ​​of parallel test results is taken. Additional remarks:
This standard is proposed and managed by the Grain Storage and Transportation Bureau of the Ministry of Commerce. This standard was drafted by Anhui Cereals, Oils and Foodstuffs Bureau and Henan Cereals Research Institute. This standard was interpreted by the Inspection Division of the Grain Storage and Transportation Bureau of the Ministry of Commerce. Approved by the Ministry of Commerce of the People's Republic of China on October 8, 1987 and implemented on April 1, 1988
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