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GB/T 24534.4-2009: Cereals and pulses -- Determination of hidden insect infestation -- Part 4: Rapid methods
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Cereals and pulses -- Determination of hidden insect infestation -- Part 4: Rapid methods
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GB/T 24534.4-2009
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Basic data | Standard ID | GB/T 24534.4-2009 (GB/T24534.4-2009) | | Description (Translated English) | Cereals and pulses -- Determination of hidden insect infestation -- Part 4: Rapid methods | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.060 | | Word Count Estimation | 18,117 | | Date of Issue | 2009-10-30 | | Date of Implementation | 2009-12-01 | | Quoted Standard | GB 5491; GB/T 5519; GB/T 12620; GB/T 21305; GB/T 24534.2 | | Adopted Standard | ISO 6639-4-1987, MOD | | Regulation (derived from) | National Standard Approval Announcement 2009 No.12 (Total No.152) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the-hidden insect extent of infection, or whether there is a quick way to five kinds of infections. Method One: Determination of the breaking dioxide method is applicable to the full grain or coarse grain and after rolling through fine sieve to remove food and activity was measured after the insect is not suitable for the determination of the method: a) finely ground grain processing product, because of its particles can absorb moisture in the air, b) water content greater than 15 percent of the food products. Because the food itself and the microbes produce carbon dioxide may affect the results. Further, this method is not suitable for rapid detection have a lot of carbon dioxide absorption of food products. If the root CA storage of food or serious pest infestation of grain. This method can be used for coarse particles or coarse grain products, when tested using the test sieve particles to distinguish between intact and exposed pests. This method does not allow determination of dead adults, pupae, larvae and eggs. Method Two | GB/T 24534.4-2009: Cereals and pulses -- Determination of hidden insect infestation -- Part 4: Rapid methods
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. Cereals and pulses Determination of hidden insect infestation Part 4. Rapid methods
ICS 67.060
B20
National Standards of People's Republic of China
Determination of cereals and pulses hidden insect infestation
Part 4. Rapid methods
(ISO 6639-4. 1987, MOD)
Posted 2009-10-30
2009-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 24534 "cereals and pulses - Determination of hidden insect infestation" includes the following four parts.
--- Part 1. General;
--- Part 2. Sampling;
--- Part 3. Reference method;
--- Part 4. Rapid methods.
This section GB/T Part of 424,534.
The partial modification using ISO 6639-4. 1987 "Part 4 Determination of cereals and pulses hidden insect infestation. the quick way."
This portion of the ISO 6639-4. 1987 main technical differences are as follows.
--- With GB/T 12620 instead of ISO 565;
--- With GB 5491 instead of ISO 950.
For ease of use, this section made the following editorial changes.
--- Remove the ISO 6639-4. 1987 Foreword;
--- Remove the ISO 6639-4. 1987's "Introduction" section;
--- The GB/T 24534.2 added to the "normative references" in;
--- With GB/T 5519 instead of ISO 520;
--- With GB/T 21305 instead of ISO 712.
This part is proposed by the National Food Authority.
This part of the National Grain and Oil Standardization Technical Committee centralized.
This section drafted by. National Food Reserve Chengdu Grain Storage Research Institute.
The main drafters of this section. Yan Xiaoping, Zhou Hao, Xu Shengwei, Lan Sheng Bin, Tan Chang first, Liwan Wu, Ding Jianwu, Hou Xingwei, Guodao Lin.
Determination of cereals and pulses hidden insect infestation
Part 4. Rapid methods
1 Scope
This section GB/T 24534 specifies the extent of hidden insect infection cereals or legumes used to estimate the sample, or whether there is infection
5 Quick Ways.
Method One. Determination of carbon dioxide
This method is applicable to the determination of complete grain bread and coarse grinding or after rolling through fine sieve to remove insect activity and after food.
This method is suitable for determining.
a) finely ground grain processed products, because the particles may absorb moisture in the air;
b) the moisture content greater than 15% of food products. Because of their own food and microbes produce carbon dioxide may affect the results.
In addition, this method is not suitable for rapid detection of a large number of already adsorbed carbon dioxide food products. Such as controlled atmosphere storage of food or serious
Heavy pest infestation food.
This method can be used for coarse or coarsely ground grain products, when using a screening test to distinguish between good test particles and exposed pests.
This method does not allow determination of the dead adults, pupae, larvae and eggs.
Method Two. ninhydrin method
This method is applicable to the determination of any dried food inside the insect infestation, particularly wheat, sorghum, rice and other food grains of similar size.
Big grain grain such as corn, should be measured before partially broken (crushed). However, these processes may lead to large grain grain reduce the number of insects or beaten
Debris leaving the results are described unreliable. This method may underestimate the eggs and young larvae, but in this aspect, the method is not better than any other party
Difference method.
Method three. Whole grain flotation
This method is suitable for most grains and legumes hidden infection assay, but only qualitative.
Method four. Sound assay
This method is applicable to the determination of insect feeding activity in adults and larvae, adults do not apply to the determination of death, larvae or eggs live within food grains and
Pupae (non-take insectivorous state).
Method five. X-ray method
This method is applicable to the determination of food grains in the living and dead larvae and adults. Just kill insects (such as fumigation caused) may be difficult and is still alive
The insect difference.
2 Normative references
The following documents contain provisions which, through GB/T 24534 in this part of the reference in terms of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB 5491 grain and oilseeds testing for sampling, and sample method
GB/T 5519 Determination of cereals and pulses grain weight (GB/T 5519-2008, ISO 520. 1977, MOD)
GB/T 12620 long hole, rectangular and round hole sieve
GB/T 21305 Cereals and cereal products - Determination of moisture conventional method (GB/T 21305-2007, ISO 712.1998, IDT)
24534.2 cereals and pulses - Determination of hidden insect infestation GB/T Part 2 sampling (GB/T 24534.2-2009,
ISO 6639-2. 1986, MOD)
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