QB/T 2153-1995 Industrial oleic acid

This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage conditions of industrial oleic acid. This standard applies to industrial oleic acid obtained by refining the liquid fatty acid part obtained by hydrolysis, distillation and separation of animal and vegetable oils and fats. QB/T 2153-1995 Industrial Oleic Acid QB/T2153-1995 Standard download decompression password: www.bzxz.net

Light Industry Industry Standard of the People's Republic of China
Industrial Oleic Acid
Subject Content and Scope of Application
QB/T 2153--95
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage conditions of industrial oleic acid. This standard applies to industrial oleic acid obtained by refining the liquid fatty acid part obtained by hydrolysis, distillation and separation of animal and vegetable oils and fats.
Reference standards
Determination of moisture in petroleum products
GB 618
General method for determination of crystallization point of chemical reagents
Test method for industrial stearic acid
GB 9104.1
GB 9104. 2
Test method for industrial stearic acid
Determination of iodine value
Determination of saponification value
GB9104.3 Test method for industrial stearic acidDetermination of acid value3 Product classification
The main component of industrial oleic acid is cis-octadecanoic acid, which generally contains about 70%, and contains a certain amount of hexadecanoic acid, octadecadienoic acid, a small amount of other saturated acids, unsaturated acids and unsaponifiable matter, etc. Industrial oleic acid is divided into three types according to its use and solidification point: Y-4 type, Y-8 type and Y-10 type. 4 Technical requirements
4.1 Appearance: light yellow or brownish yellow transparent oily liquid. When exposed to air, the color gradually darkens with time. 4.2 Physical and chemical indicators
The physical and chemical indicators of industrial oleic acid must comply with the requirements of Table 1. Table 1
Item name
Freezing point, C
Iodine value.gl2/100g
Saponification value, mgKOH/g
Acid value, mgKOH/g
Water content, %
Color.Hazen
Approved by China Light Industry Association on October 24, 1995
Y-4 type
190～205
190～203
http://foodmate.netY-8 type
80~100
190~205
190~203
Y-10 type
80~100
185~205
185203
1996-06-01 implementation
5 Test method
5.1 Determination of freezing point
QB/T 2153—95
The freezing point shall be determined in accordance with the provisions of GB618. 5.2 Determination of iodine value
The iodine value shall be determined in accordance with the provisions of GB9104,1. 5.3 Determination of saponification value
The saponification value shall be determined in accordance with the provisions of GB9104.2. 5.4 Determination of acid value
Acid value shall be determined in accordance with the provisions of GB9104.3. 5.5 Determination of water content
Water content shall be determined in accordance with the provisions of GB260. 5.6 Determination of color
5.6.1 Principle
Based on the similar spectral absorption characteristics of industrial oleic acid samples and platinum-cobalt colorimetric solutions, a spectrophotometer is used to measure the absorbance of a series of platinum-cobalt standard colorimetric solutions at a wavelength of 373nm, and a colorimetric value-absorbance standard working curve is drawn; the absorbance of the sample is measured under the same conditions, and the corresponding colorimetric value is obtained from the working curve, which is expressed in Hazen units to represent the color value of the oleic acid sample. 5.6.2 Reagents
Cobalt chloride hexahydrate (CoCl2·6H,O) (GB1270); Potassium chloroplatinate (K,PtCl2);
Hydrochloric acid (GB 622);
Anhydrous ethanol (GB678).
5.6.3 Instruments
Spectrophotometer, wavelength range 360~800nm, with 10mm colorimetric cell; brown volumetric flask, 25ml.
5.6.4 Test procedure
5.6.4.1 Drawing of standard working curve
Preparation of platinum-cobalt standard colorimetric stock solution
In a 1000mL brown volumetric flask, dissolve 1.000g cobalt chloride (CoCl2·6Hz0)) and 1.245g potassium platinate (equivalent to 0.500g gold platinum) in distilled water, add 100ml hydrochloric acid, dilute to the scale with distilled water, and mix well. This solution is 500 Hazen standard colorimetric stock solution
The standard colorimetric stock solution is checked with a spectrophotometer using a 10mm colorimetric cell at the following wavelengths. Its absorbance range is: Wavelength, nm
Absorbance
0.110~~0.120
0. 130~~0. 145
0. 105~0. 120
0. 055~~0. 065
Preparation of platinum-cobalt standard colorimetric solution
Use a burette to transfer the specified volume of standard colorimetric stock solution in Table 2 to 8 25ml volumetric flasks, dilute to the scale with distilled water, and mix to obtain the platinum-cobalt standard colorimetric solution.
http://foodmate.netPlatinum-cobalt color value.Hazen
Standard storage volume, mL
Draw standard working curve
QB/T2153—95
Table 2 Platinum-cobalt standard color solution
Inject the prepared 8 platinum-cobalt color standard solutions into the 10mm colorimetric cell one by one, use distilled water as a reference, and measure their absorbance with a spectrophotometer according to 5.6.4.2. Then, with the platinum-cobalt color value (Hazen) as the horizontal axis and the absorbance as the vertical axis, draw the color value (Hazen)-absorbance working curve.
5.6.4.2 Determination
aAccording to the instrument manual, set the wavelength to 373nm, turn on the power to preheat the instrument, select the instrument sensitivity, and adjust the zero point. b. Use a pipette to draw 1 ml of the clear and transparent oleic acid sample and put it into a dry and clean 10 ml volumetric flask. Dilute it to the mark with anhydrous ethanol, shake it, pour the diluted sample into a 10 mm colorimetric cell, use anhydrous ethanol as a reference to determine the absorbance, and take the average value of the absorbance values ​​measured three times as the final measurement result. The range of the absorbance values ​​measured three times should not be greater than 0.005. 5.6.4.3 Representation of measurement results
The color value (Hazen) obtained from the color value (Hazen)-absorbance standard working curve is the color value of the sample. 6 Inspection rules
6.1 Products are delivered and sampled in batches. The same model products produced under the same conditions and delivered in one batch constitute a delivery batch. 6.2 Products must be inspected and qualified by the quality inspection department of the production unit according to all indicators specified in Chapter 4 of this standard, and a quality certificate must be issued before they can leave the factory. The receiving unit shall sample and accept the product according to the quality certificate in accordance with this standard. 6.3 Sampling
Determine the sample size (number of barrels) according to Table 3 based on the batch size (number of barrels). Table 3
Batch size, number of barrels
Sample size, number of barrels
16～25
26～50
Melting the product in the sample container, after mixing, slowly inserting the loose-mouthed glass tube with a diameter of 10～15mm vertically into the bottom of the container, and then tightly closing the upper mouth, lifting it vertically, and taking out equal amounts of samples from each sample container, the total amount is about 1kg. After mixing evenly, divide it into: clean and dry sample bottles and seal them. The two parties to the delivery shall each hold · copies for inspection, and the third copy shall be kept by the delivery party for arbitration inspection, and the storage period is · months.
6.4 The inspection results shall be determined by the rounded value comparison method. If there are --- items that are unqualified, samples can be taken from the double-volume samples and the unqualified items can be re-tested. If the re-test results are still unqualified, the batch of products will be judged to be unqualified. If the two parties to the delivery cannot reach an agreement due to different inspection results, they can request arbitration inspection, and the inspection results of the piece arbitration will be the final basis. 7 Marking, packaging, transportation, purchase and storage
7.1 The quality certificate of each batch of industrial oleic acid and each packaging barrel 1: should be accompanied by the following marks: manufacturer name, product name, registered trademark, model, net weight, batch number and packaging date. 7.2 Industrial oleic acid should be packaged in clean iron barrels or plastic barrels lined with anti-corrosion coatings. The lids must be sealed to ensure that there is no leakage. 7.3 The products should be purchased and stored in a cool, ventilated and dry place, away from fire sources, and should be stacked at an angle to prevent moisture corrosion and water from entering the packaging. 7.4 When transporting industrial oleic acid, do not mix it with alkali and other corrosive items to avoid sun and rain. 7.5 The shelf life is six months from the date of leaving the factory. 519bZxz.net
http://foodmate.netAdditional Notes:
QB/T2153
3—95
This standard is proposed by the Quality Standards Department of China Light Industry Association. This standard is under the jurisdiction of the National Surfactant Detergent Standardization Center. This standard was drafted by Wuhan Oil and Fat Chemical Plant and China Daily Chemical Industry Research Institute. The main drafters of this standard are Liu Wengang, Yang Xiao, Tong Jieqing, Zhou Yuanying, and Zhu Chuanjia. From the date of implementation of this standard, the professional standard ZBY44004—89 "Industrial Oleic Acid" issued by the former Ministry of Light Industry will be invalid. 520
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