GB/T 8793-1988 China Guizhou cypress oil GB/T8793-1988 Standard download decompression password: www.bzxz.net

UDC665.523.72
National Standard of the People's Republic of China
GB8793—88
Oil of cedarwood (Cupressus funebris endlicher)-Guizhou, China
Published on February 25, 1988
Implemented on June 1, 1988
Published by the State Bureau of Standards
National Standard of the People's Republic of China
Oil of cedarwood (Cupressus funebris endicher)-Guizhou, China China
UDC665523.72
GB8793-88
This standard refers to the international standards ISO4724 "Virginia cedar oil", ISO4725 "Texas cedar oil", ISO/TC54N1452E "Chinese cedar oil" and ISO/TC54/SC1N57 "Determination of cedarwood in cedar oil". Subject content and scope of application
This standard specifies the technical requirements, test methods and inspection rules of Guizhou cedar oil in China. This standard is applicable to the analysis and evaluation of the quality of Guizhou cedar oil in China. 2 Reference standards
《Color test method for uniform test methods for spices》;《Aroma test method for uniform test methods for spices》;《Sample preparation of essential oils》
《Essential oils
《Essential oils
《Essential oils
《Essential oils
ZBY41001
3 Definitions
Determination of relative density》,
Determination of optical rotation》;
Determination of refractive index》:
Evaluation of miscibility in ethanol》;
《General method for analysis of essential oils by gas chromatography on packed columns》. China Guizhou cypress oil: essential oil extracted from the roots of cypress trees (Cupressus funebris endlicher) in Guizhou Province, China by steam distillation, and processed. 4
Technical requirements
Relative density (20/20℃)
Refractive index (20℃)
Optical rotation (20℃)
Miscibility (20℃)
Approved by the Ministry of Light Industry of the People's Republic of China on 1988-02-25
Light yellow to yellow clear liquid
Has the characteristic aroma of Guizhou cypress in China 0.941~0.966
15030~150 80
-35°~25°
1 volume of test sample is mixed with 5 volumes of 95% (V/V) ethanol to form a clear solution
1988-06-01 implementationbzxZ.net
Cedrus content (filled column gas chromatography internal standard method), %
GB8793-88
Test method
Unless otherwise specified, the reagents used in the test are analytical reagents: water is distilled water or water of equivalent purity. Preparation of test sample
See QB843.
5.2 Determination of color
See QB794.
5.3 Determination of aroma
See QB795.
5.4 Determination of relative density (20/20℃) See QB974.
5.5 Determination of refractive index (20℃)
See QB976.
5.6 Determination of optical rotation (20℃)
See QB975.
5.7 Determination of miscibility (20℃)
See QB977.
Determination of cedarwood content (packed column gas chromatography internal standard method) 5.8
a. Reference substance: cedarwood, the purity of which is at least 99% as determined by chromatography under the experimental conditions; b. Internal standard: dodecanol, the purity of which is at least 99% as determined by chromatography under the experimental conditions; C. Reagents: acetone, analytical grade, free of impurities that interfere with the analysis. 5.8.2 Instruments
a. Chromatograph, recorder and microprocessor
According to the provisions of Chapter 5 of ZBY41001:
Filling column: 3m long, inner diameter 3~4mm;
Stationary phase: Carbowax 20M, 5%, coated on Chromosorb WAWDMCS 60~80 mesh; c. Detector
Hydrogen flame ionization detector.
5.8.3 Operating conditions
Chromatographic oven: linear program temperature rise from 7 0℃ to 200℃, rate 3℃/minInjection port: 220℃;
Detector: 220℃;
Carrier gas flow rate: nitrogen, 30ml/min.
5.8.4 Determination of column efficiency
GB8793-88
a. Chemical inertness test: Test according to the method specified in "Article 8.1" of ZBY41001, which shall meet the requirements; b. Column efficiency: Determine the column efficiency according to the method specified in "Article 8.2" of ZBY41001, which shall meet the requirements.5.8.5 Determination method
Use internal standard method: Determine the content of cedarwood in cedarwood oil according to the method specified in "Article 102" of ZBY41001. Determination of response factor: Measure the response factor according to the method specified in "Article 10.2.1 of ZBY41001. Use cedarwood as reference substance, dodecanol as internal standard, and acetone as solvent.
5.8.6 Repeatability and result expression
Perform according to "Article 114 of ZBY41001. 5.8.7 Establishment of chromatogram
This item is for reference only.
See Appendix A "Reference" for typical chromatograms. 6 Inspection regulations
6.1 The technical inspection department of the manufacturer is responsible for the inspection of Guizhou cedar oil in China. The manufacturer shall ensure that all products leaving the factory meet the requirements of this standard. Each batch of products leaving the factory shall be accompanied by a quality certificate. The contents include: manufacturer name, product name, trademark, production date, batch number, net weight, certificate and number of product quality compliance with this standard. 6.2 The acceptance unit has the right to inspect whether the product quality meets the requirements of this standard according to the technical requirements, test methods and inspection rules specified in this standard. Each batch number shall be inspected once, and different batch numbers shall be inspected separately. 6.3 Sampling method: Three packaging units below 100 shall be selected for each batch, and 3% more shall be selected for the additional part above 100. Use a sampling tube to extract 50-100ml of oil sample. Mix all the extracted oil samples thoroughly in the mixer, and take 50-100ml of them into two clean and dry glass bottles with frosted stoppers. Indicate on the bottle: manufacturer name, product name, batch number, quantity and sampling date. One bottle is used for inspection, and the other bottle is kept for reference.
Note: Under low temperature conditions, cedarwood brain may sometimes precipitate. At this time, the oil sample should be heated to melt and irrigate before sampling, and then the sampling method should be used for sampling.
6.4 If one of the indicators in the acceptance results does not meet the requirements of this standard, the sample can be re-tested from twice the amount of packaging in conjunction with the manufacturer. If the re-test results still show unqualified indicators, the batch of products will be rejected. 6.5 When the supply and demand parties have objections to the product quality, they can resolve the dispute by agreement or invite a third party to arbitrate, and the cost shall be borne by the responsible party. 7 Marking, packaging, transportation, storage
7.1 China Guanzhou Baiben Oil should be packed in dry, clean and odorless galvanized tin barrels. Indicate on the outside: manufacturer name, product name, batch number, net weight, tare weight, factory date and this standard number. The net weight of each barrel of product packaging is 180kg. If the ordering unit has special requirements, it can make another agreement with the manufacturer.
7.2 This product should be stored in a dry and windproof warehouse. Prevent foreign air pollution. Prevent sunlight, rain and violent impact during transportation. 7.3 If the specified shipping conditions are met, the packaging is intact and the product is not opened, the shelf life is one year. 3
GB8793-88
Appendix A
Typical chromatogram
Reference
Internal standard: dodecanol
Additional instructions:
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. Gas chromatography conditions:
Sample: Baimu Port, Guizhou, China,
Column: thin column, 3m long, 3~4m inner diameter
Stationary phase: Carbowx20M5% coated on
Chromosorb W Aw
DMCS60~80 days.
Chromatographic oven temperature: linear program ramp up? 0℃ to 200℃, rate 3℃/m1n,
inlet temperature: 220℃
detector temperature: 220℃.
Carrier gas flow rate: ammonia 30m1/m1n,
Detector: ammonia flame ionization detector. a-Cedrene
2-B-Cedrene + ethers
3·Rohanger
.·Thujacene
5Cedrene
6·Pinnasol
This standard is under the jurisdiction of the Institute of Spice Industry Science of the Ministry of Light Industry. This standard was drafted by the Institute of Spice Industry Science of the Ministry of Light Industry and Guizhou Province Spice Factory. National Standard of the People's Republic of China
China Guizhou Cedar Oil
GB8793-88
Published by Light Industry Press
Published by the Editorial and Publishing Committee of Light Industry Standardization (Address: No. 12 Guanghua Road, Chaowai, Beijing) All rights reserved·No reproduction
8826188
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