QB/T 4612-2013 PDF English
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QB/T 4612-2013: PDF in English (QBT 4612-2013) QB/T 4612-2013
QB
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 67.180.20
Classification No.: X 69
Filing No.: 43644-2013
Lactulose
乳果糖
ISSUED ON: DECEMBER 31, 2013
IMPLEMENTED ON: JULY 01, 2014
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Chemical name, molecular formula, relative molecular mass, structural formula ... 4
4 Product categories ... 5
5 Requirements ... 5
6 Test methods ... 6
7 Inspection rules ... 7
8 Sign, packaging, transportation, storage ... 8
Appendix A (Normative) Determination method of lactulose content ... 10
Lactulose
1 Scope
This standard specifies the product classification, requirements, test methods,
inspection rules, marking, packaging, transportation, storage of lactulose.
This standard applies to lactulose, which is produced and processed using lactose as
raw material, through isomerization, centrifugation, purification, concentration and
other processes.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 613 Chemical reagent - General method for the determination of specific
optical rotatory power (specific optical rotation)
GB 2762 National food safety standard - Maximum levels of contaminants in foods
GB 5009.3-2010 National food safety standard - Determination of moisture content
in foods
GB/T 6682-2008 Water for analytical laboratory use - Specification and test
methods (ISO 3696:1987, MOD)
GB 7718 National food safety standard - Standard for nutrition labelling of
prepackaged foods
GB 13509 Food additive - Xylitol
GB 14881 National food safety standard - General hygienic regulation for food
production
GB 15203 Hygienic standard of corn sweetener
GB/T 20885 Glucose syrup
3 Chemical name, molecular formula, relative molecular
6.2.2 Moisture
Make determination, according to the method I of GB/T 5009.3-2010.
6.2.3 Burning residue
Make determination, according to the method specified in GB 13509.
6.2.4 Specific rotation
Make determination, according to the method specified in GB/T 613.
6.2.5 pH
Make determination, according to the method specified in GB/T 20885.
6.2.6 Melting point
Make determination, according to the method specified in GB 13509.
6.3 Contaminant limit
Make determination, according to the method specified in GB 2762.
6.4 Microbiological limits
The total number of bacterial colonies, coliforms, therapeutic bacteria are determined,
according to the method specified in GB 15203.
6.5 Hygiene in production process
Make determination, according to the method specified in GB 14881.
7 Inspection rules
7.1 Group-batch
The products of same type and quality, which are produced by the same batch of
materials, form a batch.
7.2 Sampling and sample retention
The samples are randomly taken from the finished product warehouse, from each batch
based on output. The total sample shall not be less than 500 g.
7.3 Exit-factory inspection
The exit-factory inspection items are sense, lactulose content, moisture, burning residue,
total number of bacterial colonies, coliforms.
7.4 Type inspection
Type inspection items are all the items which are specified in this standard. In general,
type inspection is once every 6 months. In one of the following conditions, type
inspection shall also be carried out:
a) When the raw material and auxiliary material change significantly;
b) When the key process or equipment changes;
c) When the product is trial-produced OR when the production is restored after
suspension of normal production for 3 months;
d) When the exit-factory inspection differs significantly from the results of last type
inspection;
e) When the national quality supervisory inspection institute conducts spot checks,
according to the relevant provisions.
7.5 Judgement rules
7.5.1 If all inspection items of the inspected sample are qualified, THEN, this batch of
products are qualified.
7.5.2 When any one of the sensory requirements and physical-chemical indicators are
unqualified, double the number of samples from this batch of products for re-inspection.
The re-inspection result shall prevail.
7.5.3 When any one of the items of contaminant limit, microbial limit, production
process is unqualified, THEN, this batch of products shall be unqualified.
8 Sign, packaging, transportation, storage
8.1 Sign
Prepackaging labels shall comply with the provisions of GB 7718.
8.2 Packaging
Packaging containers shall be clean AND comply with appropriate hygienic standards.
8.3 Transportation
During transportation, it shall be protected from exposure to the sun and rain. It is
prohibited to transport it together with toxic and harmful substances.
Appendix A
(Normative)
Determination method of lactulose content
A.1 Summary of methods
Use high performance liquid chromatography. Under selected working conditions, use
water as the mobile phase, to separate the components in the sample solution, through
the chromatographic column. Use a differential refractive index detector, for detection.
Use the external standard method or area method, for quantification. Calculate the
lactulose content in the sample.
A.2 Reagents and materials
A.2.1 Water: GB/T 6682-2008, grade-1 water.
A.2.2 Lactulose standard: The purity shall be above 99.0%. Prepare 6 standard solution
series, which have different concentrations (0.1 mg/mL, 0.2 mg/mL, 0.4 mg/mL, 0.8
mg/mL, 1.0 mg/mL, 2.0 mg/mL), in the range of 0.1 mg/mL ~ 10 mg/mL.
A.3 Instruments and equipment
A.3.1 High performance liquid chromatograph: It is equipped with a differential
refractive index detector, or other equivalent detector.
A.3.2 Mobile phase vacuum filtration degassing device and 0.22 μm filter membrane.
A.3.3 Chromatographic column: A column (column size: Φ7.8 mm × 300 mm), which
uses calcium-type strong acid positive ion exchange resin as filler, AND is dedicated
for sugar or sugar alcohol analysis, or equivalent chromatographic column.
A.3.4 Analytical balance: The sensitivity is 0.1 mg.
A.3.5 Micro-sampler: 50 μL.
A.4 Reference chromatographic conditions
A.4.1 Mobile phase: GB/T 6682-2008, grade-1 water.
A.4.2 Column temperature: 80 °C.
A.4.3 Mobile phase flow rate: About 0.5 mL/min.
A.4.4 Sample injection volume: 20 μL.
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Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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