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GB/T 18009-1999 English PDF (GBT18009-1999)

GB/T 18009-1999 English PDF (GBT18009-1999)

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GB/T 18009-1999: Palm kernel oil

This Standard specifies the characteristic index of palm kernel oil, quality requirements, inspection rules, inspection methods, packaging, transport and storage requirements.
GB/T 18009-1999
ICS 67.200.10
X 14
Palm kernel oil
Issued by. State Quality and Technical Supervision
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms ... 5
4 Technical requirements ... 5
5 Inspection rules ... 6
6 Inspection methods ... 7
7 Marks, packaging, transport and storage ... 8
Annex A (Standard) Typical product structure ... 10
This Standard equivalently uses Codex Stan 126-1981 Edible palm kernel oil, a standard of Codex Alimentarius Commission (CAC) of The United Nations Food and Agriculture Organization and the World Health Organization (FAO / WHO). The characterization index of palm kernel oil is governed by Codex Stan 126-1981. And the sliding melting point uses the actual measured data. Crude palm kernel oil is divided into grade one and grade two. The upper limit of the fatty acid value of grade-one crude oil is referred to FAO / WHO (draft, 198) (2.14%); this Standard is set at 2.0%. The upper limit of grade-two crude oil fatty acid is referred to British and American industry standards, less than 5.0%. The quality of refined palm kernel oil is governed by Codex Stan
Annex A of this Standard is a standard annex.
This Standard was proposed by Ministry of Agriculture of the People 's
Republic of China.
This Standard shall be under the jurisdiction of National Technical Committee on Ministry of Agriculture, Tropical Crops and Products of Standardization Administration of China.
The drafting organization of this Standard. Chinese Institute of Tropical Agricultural Sciences, South China Institute of Tropical Agricultural Products Processing Design.
Main drafters of this Standard. Chen Shengrong, Li Zhenlian, Chen
This Standard entrusts the Ministry of Agriculture's Technical Committee on Tropical Crops and Products Standardization for the interpretation.
Palm kernel oil
1 Scope
This Standard specifies the characteristic index of palm kernel oil, quality requirements, inspection rules, inspection methods, packaging, transport and storage requirements.
This Standard is applicable to vegetable oils extracted from mature nuts of Elaeis Guineensis Jacq.
2 Normative references
The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. At the time of publication, the editions indicated are valid. All standards are subject to revision. The parties who are using this Standard shall explore the possibility of using the latest version of the following standards.
GB 2716-1988, Hygienic standard of edible vegetable oil
GB/T 5009.37-1996, Method for analysis of hygienic standard of edible oils GB/T 5524-1985, Animal and vegetable fats and oils - Sampling
GB/T 5525-1985, Inspection of vegetable oils; Methods for identification of transparency, colour, odor and taste
GB/T 5526-1985, Inspection of vegetable oils; Methods for determination of specific gravity
GB/T 5527-1985, Inspection of vegetable oils--Methods for determination of refractive index
GB/T 5528-1995, Method for determination of moisture and volatile matter in vegetable oil and fat
GB/T 5529-1985, Inspection of vegetable oils; Methods for determination of foreign matter
GB/T 5530-1998, Animal and vegetable fats and oils-Determination of acid value and of acidity (eqv ISO 660.1983)
200.32 - the molecular weight of Lauric acid;
56.1 - potassium hydroxide molecular weight;
1/10 - conversion ratio.
6.8 The determination of iodine value shall be carried out according to GB/T 5532.
6.9 The determination of saponification value shall be carried out according to GB/T 5534.
6.10 The determination of non-saponification shall be carried out according to GB/T 5535.
6.11 The determination of melting point (sliding point) shall be carried out according to GB/T 5536. Before the determination, the sample shall be clean and anhydrous. The prepared capillary column shall be waterproof at 15??C ~ 17??C and solidified for over 16 h. During the determination, the melting point shall be the water bath temperature when grease sample begins to melt and slide upwards along with capillary.
6.12 The determination of POV shall be carried out according to GB/T 5538. 6.13 The determination of volatile fatty acid shall be carried out according to Annex A of this Standard.
7 Marks, packaging, transport and storage
7.1 Marks
The palm kernel oil mark shall comply with the provisions of GB 7718. Its content shall contain.
a) product?€?s name (standard code);
b) net weight;
c) production lot number and date;
d) storage time of shelf life;
e) origin;
Free fatty acid (in Lauric
acid, %)
Acid value (KOH,
Annex A
Typical product structure
A.1 Reagents
A.1.1 Glycerol. analytical pure
A.1.2 50% (m/m) sodium hydroxide solution. stored in a sealed plastic bottle; absorb clear and precipitation-free supernatant
A.1.3 Sulfuric acid solution, c(1/2H2SO4) = 1 mol/L
A.1.4 Phenolphthalein indicator. take 0.5 g of phenolphthalein to dissolve in 100 mL of 95% (V/V) ethanol
A.1.5 95% (V/V) neutral ethanol. neutralize till phenolphthalein just appears pink before use
A.1.6 Sodium hydroxide standard solution. c(NaOH) = 0.1 mol/L
A.1.7 Zeolite. grind and sieve the zeolite; take particles of 0.18 mm to 0.30 mm in size
A.2 Apparatus
A.2.1 Engraved cylinder. 100 mL in volume
A.2.2 Suction tube. 100 mL and 50 mL in volume
A.2.3 Distillation apparatus. the shape and size of the distiller are shown in Figure A1; fixed on distillation support. The requirements for the components are described in A 2.3.1 to A 2.3.6.
A.2.3.1 Distillation head. the shape and size of the distillation head are shown in Figure A2.
used instead of the grease sample for the blank test. The specific operations are shown as above.
A.3.3.2 Distillation
Take 0.1 g of zeolite to add into a distillation bottle filled with saponification solution. Add 50 mL of sulfuric acid solution of which the concentration is 1.0 mol/L. Then immediately connect the distillation bottle onto the distillation apparatus for heating so as to make water-insoluble fatty acid completely melted. At the moment, do not let the saponification solution boil. And then increase the firepower to improve the heating rate. It is required to distill 110 mL of distillate within 19 min to 21 min. The distillation process should pay attention to maintaining a fast enough cooling water flow so that the distilled solution is guaranteed to flow at 18??C to 21??C.
Collect the distillate to 110 mL and remove the heat source. Remove the receiving bottle and plug the bottle with a stopper. Be careful not to shake the contents of the bottle. Then use another 25 mL cylinder to receive the
remaining distillate. Place the receiving bottle containing the distillate in a 15??C water bath for 10 min. The water surface of the water bath must be equal to the contents of the receiving bottle. After the liquid temperature is balanced, take it out. Wipe the outer wall of the bottle. Slowly reverse the bottle to avoid water-insoluble fatty acid adhesion to the plug. Reverse the bottle up and down for 4 ~ 5 times to make the mixture in the bottle evenly. Do not strongly shake it during the mixing process.
A.3.3.3 Filtration
Place the dry medium-speed filter paper close to the filter funnel. Filter the entire solution in the receiving bottle into a dry separating funnel. When the water-insoluble fatty acid floats to the liquid surface, carefully release the lower water layer into a dry 250 mL Erlenmeyer flask (ensure that all insoluble fatty acids remain in the separating funnel). Use a stopper to plug it. The aqueous solution in the flask shall be used as the filtrate for the determination of water-soluble volatile fatty acid.
Remove the distillation head. Use 15 mL of cold water to wash the inner wall of the condenser, the measuring cylinder of the remaining distillate, the receiving bottle, the filter, and the separating funnel in sequence. This washing water shall be filtered by filter paper. The size of the filter shall be big enough to make 15 mL of solution just filled to the edge of the filter. Repeat the above washing process more than twice. Each washing water is required to be completely drained. Keep the filter paper and discard the filtrate. In order to completely dissolve and collect water-insoluble fatty acids, take 15 mL of neutral ethanol instead of the above washing cold water. Repeat the

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