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GB 1886.98-2016: National Food Safety Standard -- Food Additives -- Lactitol (also known as 4-??-D-galactopyranosyl-D-sorbitol)
GB 1886.98-2016
GB
NATIONAL STANDARD OF THE
PEOPLE?€?S REPUBLIC OF CHINA
National Food Safety Standard - Food Additives - Lactitol
(aka 4-???-D-galactopyranosyl-D-sorbitol)
??????????????? ?????????(?????? 4-???-D???????????????-D-?????????)
ISSUED ON: AUGUST 31, 2016
IMPLEMENTED ON: JANUARY 1, 2017
Issued by: National Health and Family Planning Commission of the People?€?s
Republic of China.
Table of Contents
1 Scope ... 3??
2 Chemical Name, Molecular Formula and Relative Molecular Mass ... 3??
3 Technical Requirements ... 3??
Appendix A Inspection Method ... 5??
Appendix A
Inspection Method
A.1 General Rules
Unless other requirements are specified, the reagents and water used in this Standard refer to
analytically pure reagents and Grade-3 water specified in GB/T 6682. In terms of the standard
solutions used in the tests, the standard solutions, preparations and products used for impurity
determination, when no other requirements are specified, they shall be prepared in accordance
with the stipulations of GB/T 601, GB/T 602 and GB/T 603. When the solvent used for the
preparation of the solutions for the tests is not indicated, it refers to aqueous solution.
A.2 Identification Test
A.2.1 Solubility
Soluble in water.
A.2.2 Specific rotation
The specific rotation ???m (25 ???C, D) of the sample solution (100 g/L) is (+ 13 ~ + 15) (???) ??? dm2
??? kg?€?1.
A.2.3 High-performance liquid chromatography
In the high-performance liquid chromatography, the retention time of the main peak of the
sample is consistent with that of the main peak of the lactitol standard sample.
A.3 Determination of Lactitol Content and Other Polyols Content (on a dry basis)
A.3.1 Method summary
Adopt the high-performance liquid chromatography, under the selected working conditions,
separate the components in the sample solution through a chromatographic column; use a
differential detector for detection.
A.3.2 Reagents and materials
A.3.2.1 Lactitol: standard sample.
A.3.2.2 Sorbitol: standard sample.
A.3.2.3 Mannitol: standard sample.
A.3.3 Instruments and equipment
Lactitol content: it can be obtained by comparing the response of the specimen with the
response of the standard sample of lactitol with known purity.
Other polyols content: measure the areas of all peaks appearing between the lactitol peak and
the sorbitol peak. The sum of the areas of these peaks represents a mass not greater than 2.5%
of the dry sample mass.
A.4 Determination of Chloride (on a dry basis)
A.4.1 Reagents and materials
A.4.1.1 Nitric acid solution: 1 + 9.
A.4.1.2 Hydrochloric acid solution: 0.01 mol/L.
A.4.1.3 Silver nitrate standard solution: c(AgNO3) = 0.1 mol/L.
A.4.2 Analytical procedures
Weigh-take 10 g (on a dry basis) of specimen, accurate to 0.01 g; place it in a 50 mL colorimetric
tube; add 30 mL of water to dissolve it. If the liquid is alkaline, then, use nitric acid solution to
neutralize it, then, add 6 mL of nitric acid solution and add water to 50 mL. If the sample is
liquid, then, add the sample to the colorimetric tube and add water to 50 mL. Take another
colorimetric tube, add 3.0 mL of hydrochloric acid solution, add 6 mL of nitric acid solution
and add water to 50 mL. If the liquid is not clear enough, then, filter the above-mentioned two
liquids under the same conditions. Then, respectively add 1 mL of silver nitrate standard
solution, thoroughly mix it, and place it in a dark place for 5 min. On a black background, from
above the colorimetric tube, observe the turbidity of the two liquids. The turbidity of the test
solution shall not be greater than that of the standard turbidimetric solution.
A.5 Determination of Sulfate (on a dry basis)
A.5.1 Reagents and materials
A.5.1.1 Hydrochloric acid solution: 1 + 4.
A.5.1.2 Barium chloride solution: 120 g/L.
A.5.1.3 Sulfuric acid solution: 0.01 mol/L.
A.5.2 Analytical procedures
Weigh-take 10 g (on a dry basis) of specimen, accurate to 0.01 g; put it into a 50 mL colorimetric
tube; add 30 mL of water to dissolve it. If the liquid is alkaline, then, use hydrochloric acid
solution to neutralize it, then, add 1 mL of hydrochloric acid solution and add water to 50 mL.
If the sample is liquid, then, add the sample to the colorimetric tube and add water to 50 mL.
Take a Nessler colorimetric tube; add 4.0 mL of 0.01 mol/L sulfuric acid; add 1 mL of
hydrochloric acid solution and add water to 50 mL. If the liquid is not clear enough, filter it.
Then, respectively add 2 mL of barium chloride solution, thoroughly mix it, and place it in a
dark place for 10 min. On a black background, from above the colorimetric tube, observe the
turbidity of the two liquids. The turbidity of the test solution shall not be greater than that of the
standard turbidimetric solution.
A.6 Determination of Ignition Residue (on a dry basis)
Weigh-take 2 g (on a dry basis) of specimen, accurate to 0.0001 g. The amount of sulfuric acid
added is 0.5 mL. The ignition temperature is 800 ???C ??? 25 ???C. The others shall comply with
GB/T 9741.
A.7 Determination of Reducing Sugar
A.7.1 Reagents and materials
A.7.1.1 Cooper sulfate solution: take 12.5 g of copper sulfate (CuSO4 ??? H2O), dissolve it in
water and reach a constant volume of 100 mL; mix it well.
A.7.1.2 Alkaline tartrate solution: weigh-take 34.6 g of potassium sodium tartrate and 10 g of
sodium hydroxide; dissolve it in water and dilute to 100 mL. Let it stand for 2 d, then, filter it
through glass wool.
A.7.2 Analytical procedures
Weigh-take 7 g of specimen, accurate to 0.01 g. Use 35 mL of water to dissolve it in 400 mL
beaker; mix it well. Add 25 mL of copper sulfate solution and 25 mL of alkaline tartrate solution.
Cover the beaker with a piece of glass; heat it to boil and maintain boiling for 2 min. Use a
Buchner funnel, which is washed with hot water, ethanol and ether, and dried at 100 ???C for 30
min and reaches a constant mass, to filter the precipitated cuprous oxide. The cuprous oxide
collected on the filter is firstly washed with hot water, then, with 10 mL of ethanol, and finally,
thoroughly washed with 10 mL of ether, and dried at 100 ???C for 30 min. The mass of the
obtained cuprous oxide shall not be greater than 20 mg.
A.8 Determination of Nickel (Ni)
A.8.1 Reagents and materials
A.8.1.1 Methyl isobutyl ketone.
A.8.1.2 Glacial acetic acid solution: 30% (about 5 mol/L).
A.8.1.3 Ammonium pyrrolidine dithiocarbamate solution: 10 g/L.
A.8.1.4 Nickel standard solution: 0.01 mg/mL.
A.8.2 Instruments and equipment
Atomic absorption spectrophotometer: the radioactive source is a nickel hollow cathode lamp;