GB/T 41896-2022 PDF in English
GB/T 41896-2022 (GB/T41896-2022, GBT 41896-2022, GBT41896-2022)
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Quality requirements of oxygen absorber for food
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GB/T 41896-2022: PDF in English (GBT 41896-2022) GB/T 41896-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 67.250
CCS X 09
Quality Requirements of Oxygen Absorber for Food
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: MAY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Technical Requirements ... 5
5 Inspection Methods ... 6
6 Inspection Rules ... 12
7 Labeling and Marking ... 13
8 Packaging, Transport and Storage ... 14
Appendix A (Informative) Calculation of Nominal Oxygen Absorbed Capacity ... 15
Quality Requirements of Oxygen Absorber for Food
1 Scope
This Document specifies the product classification, technical requirements, inspection rules,
labeling and marking, packaging, transportation, storage and other requirements of oxygen
absorber for food; and describes the inspection methods of quality of oxygen absorber for food.
This Document is applicable to the production, inspection and sales of oxygen absorber for
food produced from food-grade raw and auxiliary materials.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in 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 Document.
GB/T 191 Packaging – Pictorial Marking for Handling of Goods
QB/T 1130 Plastics Angle Tear Performance Test Method
QB/T 2358 Test Methods for Thermal Sealing Strength of Plastic Film Packaging Bag
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply.
3.1 Oxygen absorber
A product that can react with oxygen within a specified period of time to reduce the oxygen
concentration in food packaging to below 0.1% (volume fraction) and maintain it for a certain
period of time.
NOTE: According to the oil-and-water-proof performance, it is divided into oil-and-water-proof type and
non-oil-and-water-proof type.
3.2 Total oxygen absorbed capacity; maximum oxygen absorbed capacity
Under normal temperature and pressure, the maximum volume of oxygen that a unit packaged
correct the value of the scale change.
The upper limit time for detecting oxygen absorbed capacity is 8d.
5.3.1.4 Calculation of results
The maximum oxygen absorbed capacity is calculated according to Formula (1):
Where:
V – maximum oxygen absorbed capacity, in mL;
ΔV1 ~ ΔVn – change value of liquid level from the first time to the nth time, in mL.
Take 3 packs of oxygen absorbers for parallel measurement; take the arithmetic mean as the
final result; and retain 1 significant figure for the calculation result.
5.3.2 Trace oxygen analyzer method (arbitration method)
5.3.2.1 Principle
Take 1 pack of oxygen absorber and put it into a polyvinylidene chloride bag (K nylon bag) and
then seal it. Paste a soft silicone gasket on the corner of the bag body; and inject a sufficient
amount of air on the gasket with a syringe (can be repeated several times. After that, heat seal
again at the position of the silicone gasket to prevent air leakage at this position); and record
the cumulative volume of injected air as the initial volume; and multiply the initial volume by
20.9% to obtain the initial oxygen volume. After storing at room temperature for a certain
period of time, use the drainage method to test the volume of the K nylon bag at this time; and
then use a trace oxygen analyzer to detect the oxygen concentration in the K nylon bag. At this
time, the volume of the K nylon bag multiplied by the corresponding oxygen concentration is
the remaining oxygen volume in the K nylon bag after the oxygen absorbing of the oxygen
absorber. The initial oxygen volume minus the remaining oxygen volume is the maximum
oxygen absorbed capacity.
5.3.2.2 Apparatuses
The apparatuses are as follows:
--- sealer;
--- trace oxygen analyzer: the accuracy is ±0.005% at the oxygen concentration of 0%~0.5%;
the accuracy is ±0.05% at the oxygen concentration of 0.5%~5%; and the accuracy is
±0.25% at the oxygen concentration of 5%~25%;
--- plastic bag: a K nylon bag with a volume greater than 6 times the nominal oxygen
absorbed capacity, or a bag made of other materials with an oxygen barrier rate and water
vapor transmission rate close to that of K nylon;
--- syringe for inflation: it can be continuously and quantitatively inflated;
--- sealing rubber pad;
--- filter paper.
5.3.2.3 Detection procedure
Put the oxygen absorber into the K nylon bag; place or do not place the water-soaked filter
paper according to the purpose of the product. Quantitatively fill in air with 6 times the nominal
oxygen absorbed capacity (see Appendix A for the calculation), the filling air shall not cause
the nylon bag swell tight. Use the drainage method to measure the volume V0 of the bag at this
time; place the K nylon bag in a constant temperature environment at 20 ° C ~ 25 ° C, measure
the oxygen concentration X in the K nylon bag after a certain period of time; and use the
drainage method to measure the volume VX of the bag at this time. The upper limit time for
detecting oxygen absorbed capacity is 8d.
5.3.2.4 Calculation of results
The maximum oxygen absorbed capacity shall be calculated as per Formula (2):
Where:
V – maximum oxygen absorbed capacity, in mL;
20.9% - oxygen content in normal air;
V0 – the initial volume of the K nylon bag when it is fully inflated, in mL;
X – oxygen concentration of the oxygen absorber after oxygen absorbing, in %;
VX – volume of K nylon bag after the oxygen absorbing of oxygen absorber, in mL.
Take every 3 samples as a group; take the arithmetic mean of the 3 groups of test specimens;
and retain 1 significant figure for the calculation results.
5.4 Oxygen absorbed speed
5.4.1 Principle
Place the specimen in a closed environment with air at room temperature; measure the oxygen
concentration in the environment at different times; and record the minimum time required for
the oxygen concentration to drop below 0.1% (volume fraction).
5.4.2 Instruments
The instruments are as follows:
--- sealer;
--- trace oxygen analyzer (5.3.2.2);
--- plastic bags (see 5.3.2.2);
--- syringe for inflation: it can be continuously and quantitatively inflated.
5.4.3 Determination procedures
Put the oxygen absorber into a plastic bag; put the food to be deoxidized into the bag with edible
salt, isooctanol or directly, and seal it. Fill the plastic bag to make it swell with the amount of
air corresponding to the nominal oxygen absorbed capacity; and then record the time required
for the plastic bag when its internal oxygen concentration is less than 0.1% (volume fraction).
Take 3 packs of oxygen absorber for parallel detection and calculation; take the arithmetic mean
as the final result; and retain 1 significant figure for the calculation result.
5.5 Leakage-proof performance
5.5.1 Vibration method (arbitration method)
Choose a leakage-proof performance testing machine with a vertical oscillation amplitude of
40 mm and an oscillation frequency of 50 times/min ~ 350 times/min. Put a clean ultra-thin
polyethylene (PE) bag with constant weight into a clean non-stick powder test basket to ensure
the ultra-thin PE bag with constant weight is closely attached to the non-stick powder test basket;
and then the PE bag is placed on the outside to make the test basket form a vacuum environment
when the instrument is running. And then the non-stick powder test basket is placed on the
adjustable stroke material rack of the equipment. Quickly take multiple packs of oxygen
absorbers with a total amount of no less than 150g; place them flat in the non-stick powder test
basket; cover the sealable equipment with cap. Start the multi-station vacuum device; the non-
stick powder test basket forms a vacuum environment; and then statically stand for more than
3h until the non-stick powder test basket cools to room temperature. Set the specimen
oscillation frequency to 300 times/min; the oscillation time to 30min; start the equipment
oscillation function; remove the equipment cover after the oscillation is over. Take out the ultra-
thin PE bag with constant weight and weigh it; and record all the dust values.
5.5.2 Spreading method
Take 1 pack of oxygen absorber; cut off the sealed edge; pour out the contents; and obtain a
single-piece inner package. Then lay two layers of tissue papers on a hard surface; then lay the
single-piece inner package flat on the two-layer tissue paper; use an ordinary oil pen to take the
writing force to apply back and forth evenly to half the area of the single-piece inner package;
Where:
M1 – water absorbed capacity, in g/m2;
m3 – mass of oxygen absorber after soaking in water, in g;
m4 – mass of oxygen absorber before soaking in water, in g;
S – inner package area of oxygen absorber, in m2.
Take every 3 samples as a group; take the arithmetic mean of 3 groups of test specimens; and
retain 1 significant figure for the calculation results.
5.8 Dropping performance
Take 3 packs of oxygen absorber and drop it naturally from a height of 1.2m to a horizontal
rigid smooth surface.
5.9 Right-angle tearing strength
Test according to the method specified in QB/T 1130; and retain 1 significant figure for the
calculation result.
5.10 Heat-seal strength
Test according to the method specified in QB/T 2358; and retain 1 significant figure for the
calculation result.
6 Inspection Rules
6.1 Batching
Take the products manufactured by the same raw materials, the same process, and the same
shift as a batch.
6.2 Sampling method and quantity
Samples shall be drawn by random sampling method; and the number of samples shall meet
the inspection requirements.
6.3 Exit-factory inspection
6.3.1 Each batch of products shall be inspected by the quality inspection department of the
manufacturer according to the exit-factory inspection items. The products can leave the factory
after passing the inspection.
6.3.2 The exit-factory inspection items include sensory perception, leakage-proof performance
(powder leakage, no stain), oil-proof performance, water-proof performance, and dropping
performance.
6.4 Type inspection
6.4.1 Normal production shall carry out type inspection once a year. In one of the following
situations, type inspection shall also be carried out:
a) trial production appraisal of new product;
b) after formal production, if there are major changes in raw materials and processes, which
may affect product quality;
c) when the production has been discontinued for a long time and resumed;
d) when there is a large difference between the exit-factory inspection result and the last
type inspection result;
e) when the relevant national supervisory agency requests type inspection.
6.4.2 The type inspection items include all or part of the items stipulated in 4.2 and 4.3 agreed
by both parties.
6.5 Judgment rules
6.5.1 All inspection items meet the requirements of 4.2 and 4.3, and this batch of products is
judged to be qualified.
6.5.2 If there is any unqualified item in the inspection result, double sampling can be re-
inspected once in the same batch of products; and if there is still one unqualified item after the
re-inspection, the batch of products shall be judged as unqualified.
7 Labeling and Marking
7.1 The inner packaging of the oxygen absorber shall be marked with eye-catching words such
as "oxygen absorber" (or equivalent name) and "inedible"; the iron-based oxygen absorber shall
also be marked with "no microwave" (or equivalent words).
7.2 The packaging, storage and transportation diagrams shall comply with the provisions of
GB/T 191; and the single-piece (pack) small package shall be marked with the product name
or abbreviation.
7.3 The outer packaging shall be labeled with product name and model, quantity, serial number
of this Document, production date or batch number, expiration date, instructions for use, name
and address of the manufacturer. The subcontracting time should be marked.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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