This standard specifies the determination method of petroleum ether extracts in tobacco and its products. This standard is applicable to the determination of petroleum ether extracts in tobacco and its products. YC/T 176-2003 Determination of petroleum ether extracts in tobacco and tobacco products YC/T176-2003 Standard download decompression password: www.bzxz.net

The rate of good quality is high. The national tobacco labeling technical committee (TC14) is responsible for this standard. The drafting unit of this standard is Qingzhou Tobacco General Research Institute of China National Tobacco Corporation. The main contributors to this standard are: She Jiamei, Shang Yao, Tu Xiaoling, Tu Qing, Shichan, Zhang Chuanle. Yt/T 176—2003bzxZ.net
1 Standard
Determination of petroleum ether extracts of tobacco and tobacco products This standard specifies the determination method of petroleum ether extracts in tobacco and its products. This standard is applicable to the determination of tartaric acid in tobacco and its products. 2 Normative references
YC/T176—2003
The following documents become the provisions of this standard before they are cited. All referenced documents in the legal period shall be subject to all subsequent amendments (excluding the internal amendments of the period). >No version of this standard applies, however, the latest version of this document shall apply to all references to date. GR/TECE. Volume Detailed
YC5 Principles for the extraction of bulk raw materials of tobacco (T-192.S0874:1981) Moisture determination kits for tobacco and tobacco preparations (T-192.S0874:1981)
The following terms and definitions apply to this standard
Petroleum extraction Extraction ptlruleumetherexiraclThis international standard specifies the conditions for the use of petroleum turbidity to extract the total amount of all substances in the sample. 4 Principle
Using petroleum turbidity to extract tobacco samples can extract substances such as aroma, fat, color decay, aldehydes, linalool, fatty acids, etc. from tobacco. By taking the mass under the standard, the mass fraction of the right sleeve extract in the tobacco can be obtained. 5 Reagents
Powder. Boil at 30℃-60℃, distill,
6 Collector equipment
6.1 Filter paper or distance paper Simple, medium speed dehumidification
6.2 Absorbent cotton or degreasing gradient
6.3 Home extractor or apparatus, 15L or 250ml.
6.4 Heat constant temperature water bath.
6.5 11 Blood drying, room temperature minus--230
6.6 Desiccant, use calcium chloride grade 1 or color-changing silica gel as desiccant. 6.7 Analytical level, sensitivity 3.1,
7 Sampling
YC5 state tobacco leaves as double laboratory samples. 1
YF/T 176—2003
1.2 Cigarettes
According to G/T06.1, take the sample with smoke for the fire test. 8.1 Preparation and determination of moisture content of the sample
According to YC/一31, prepare or separate the sample and determine the moisture content. 2 Determination times
Two samples are determined for half of the test.
8.3 Determination of petroleum ether extract
The first sample is obtained by mixing the sample with the sample and drying it for 1 hour. 6.31 The sample is collected in the bottle and then dried in the container (6.5) for 1 hour. 1. Weigh the sample and dry it in the oven for 3 hours. Call the sample to print, you take the quality, the difference between the two masses is less than: 0, until: weigh the sample (2.000 plus 0.60) * in your paper merchant (6.1), gently with absorbent cotton wide pieces or divided into running paper (6. Wrap it or a constant minus ten shock box (65) in the soil) and dry it for 2h. The liquid must be simple and should be higher than the merchant's collection skeleton (6 heart) certificate of account material, filter group package length, full diameter of the petroleum foam butadiene oil groove standard, in the receiving air add petroleum ether test together according to the three procedures of the collection, make a good connection, connect the condensate, 1) use a steamer or merchant water heat. Control the reflux effect for each hour (avoid time h,
after collection, take out the filter paper bag or filter paper bag, use the original extraction to recover the stone pool ether, and leave it in the receiving bottle until the steam stops broadcasting. Remove the receiving bottle, and dry it in a dry cabinet under (6%) temperature (%) for 2 hours, and then dry it in a dryer for 0.53 hours. Weigh the closed plate: dry it in the same cold cut for 9.5 hours, and weigh the mass: the difference between the two masses is less than 3.001, which is called 1. When the empty concave test is performed,
Note: To prevent pollution, the three crosses were made on the weighing machine. The result was calculated by the formula (1): (m, -m) -(m1)) x 100
Where:
The mass fraction of the seven oil-based substances in the sample: The mass of the oil extract, in grams?
The mass of the receiving bottle, in grams! !
The empty test bottle should be added without any damage to the required quantity, the unit is grams (empty test acceptance mass, the unit is grams (); test material mass, the unit is grams):
The measured fraction of the test material,
The arithmetic half value determined by two half-core tests is the determination result half, the error is accurate to 3.1 10
The absolute confidence of the two parallel measurements should not be the arithmetic mean of the measured values. ..l
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