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Inspection of cereals, oils and feedstuffs for import and export - Methods of sampling and preparation of samples
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| SN/T 0800.1-1999 | English | 145 |
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Inspection of cereals, oils and feedstuffs for import and export. Methods of sampling and preparation of samples
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SN/T 0800.1-2016: Inspection of cereals, oils and feedstuffs for import and export - Methods of sampling and preparation of samples
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/SNT0800.1-2016
SN
ENTRY-EXIT INSPECTION AND QUARANTINE INDUSTRY
Replacing SN/T 0800.1-1999
Inspection of cereals, oils and feedstuffs for import and
export - Methods of sampling and preparation of samples
Issued on. MARCH 9, 2016
Implemented on. OCTOBER 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 General... 7
5 Sampling and sample preparation tools and devices... 7
6 Sampling time, site... 11
7 Sampling methods... 11
8 Preparation of laboratory sample... 21
9 Number of sample... 23
10 Sample holding, identification and inspection... 23
11 Sampling report... 24
12 Specimen preparation... 24
Annex A (informative) Sampling tools... 27
Annex B (normative) Sample amount of inspection items of cereals, oils and
feedstuffs... 30
1 Scope
This Part of SN/T 0800 specifies the methods of sampling and preparation of
samples of inspection of cereals, oils and feedstuffs for import and export.
This Part is applicable to the sampling and sample preparation for inspection of
cereals, oils and feedstuffs for import and export.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 5494, Inspection of grain and oils - Determination of foreign matter and
unsound kernels of grain and oilseeds
GB/T 5502, Inspection of grain and oils - Determination of milling degree of
rice
GB/T 5524, Animal and vegetable fats and oils - Sampling
GB/T 10361, Wheat rye and respective flours durum wheat and durum wheat
semolina - Determination of the falling number according to Hagberg-Perten
GB/T 15687, Animal and vegetable fats and oils - Preparation of test sample
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in SN/T
0798 apply.
4 General
4.1 General provisions
In accordance with the provisions of SN/T 0799.
4.2 Batches
4.2.1 Batches of cereals, oils and feedstuffs
The requirements for batches are as follows.
4.2.2 Batches of grease
The amount of grease delivered in a single contract or transport document.
5 Sampling and sample preparation tools and devices
5.1 Single tube sampler
Applicable to the sampling of bagged cargo. There are three types that are
commonly used.
5.2 Double-sleeve sampler and slot receiver
Applicable to sampling of bulk static cargo.
According to the actual loading transport tools, the size of the cargo, the storage
of cargo, use double sleeve sampler of different specifications, length.
5.3 Sampling shovel
The shovel length is about 13cm, the width is about 8cm, the side height is
about 4cm, the handle length is about 8cm. See Figure A.1 of Annex A.
5.4 Automatic mechanical sampling device
Applicable to dynamic cargo sampling. The device mainly consists of four parts.
5.5 Deep-layer sampler
A semi-automatic sampling device that mainly consists of several connectable
stainless steel sampling tubes, an electric suction host, sample collection
device and base or strap, of which its sampling tube can be assembled to a
length of about 30m as required to extract deep-layer sample of the cargo.
5.6 Other sampling tools
5.6.1 ellis cup
A manual sampling device made of lightweight aluminum for drawing samples
from cargo running on conveyor belts.
5.9 Sample dividing cloth or suitable bedding
Plastic film or other material bedding for on-site sample processing.
5.10 Sample bag (tube)
Container made of strong, hygienic material that can seal.
5.11 Bottom sampler
This bottom sampler (see Figure A.2) is of stainless steel structure and is
suitable for withdrawing bottom samples from liquid oil contained in tanks or oil
tanks.
5.12 Simple counterweight sampling tank
The simple counterweight sampling tank (see Figure A.3) is suitable for
sampling at different depths in a variety of storage tank.
5.14 Tube sampler
Applicable to sampling of paste grease. (See Figure A.5). It is a stainless steel
device consisting of two concentric tubes of the same length and close together,
one of which can rotate in the other tube. Each tube has a longitudinal opening.
5.15 Sampling probe
Sampling probe (see Figure A.6) is used for stearin sampling. It is made of
stainless steel, with semi-circular or C-shaped cross section. When it is twisted
and inserted into grease, it shall obtain a sample of oil.
5.18 Sample bottle
Plastic bottle or glass bottle, capacity of 250mL ~ 1000mL.
5.19 Stainless steel spoon
Total length is 15cm ~ 20cm, handle length is 10cm ~ 15cm, the spoon is
elongated and elliptical.
5.20 Other sampling and sample preparation tools and devices
Other tools and devices for sampling and sample preparation.
6 Sampling time, site
6.1 Warehouse or storage tank sampling
The cargos are stored in warehouses, cabins or storage tanks, sampled in
batches.
6.2 Sampling when unloading
Perform cargo sampling during loading and unloading.
7 Sampling methods
7.1 Sampling of bulk cargo
7.1.1 Sampling of bulk cereals, oils and feedstuffs
7.1.1.1 Determination and requirements of sampling amount, site
7.1.1.1.2 Bulk stacking
The bulk open stacking sets a sampling zone with an area not exceeding 50m2,
a height of about 1.5m. 5 sampling points are evenly set up in each zone. When
it exceeds the specified area, it shall increase the number of sampling point
proportionally. Stacking height in principle does not exceed 1.5m.
7.1.1.1.4 Ship-cabin
Based on different loading number of single ship, perform the sampling
according to the following methods.
7.1.1.1.5 Silo
In general, no manual sampling is used in the silo. For silos with mechanized
sampling equipment, the cargo entering and exiting the silo adopts the device
specified in 5.4.Extract a small batch of samples when 1000t enters and exists
the silo. According to the unloading flow rate, set the device sampling frequency
at least 50 times.
7.1.1.1.6 Container bulk
If the number of cargo submitted for inspection of same inspection number,
same variety, same level is less than 10000t, extract one original sample per
500t. The sample number is not less than 5kg. When it is less than 500t, it shall
be calculated as 500t and extract one original sample.
7.1.1.1.7 Mobile cargo
If original samples are required taking from mobile cargo (conveyor, grab or
other loading device), it shall according to the loading conditions of original
cargo, refer to 7.1.1.1.1, 7.1.1.1.2, 7.1.1.1.3, 7.1.1.1.4, 7.1.1.1.5, 7.1.1.1.6,
determine the number of batches, number of samples. Then according to the
mass, delivery time and flow speed of the cargo to be inspected, estimate the
sampling interval time and number of extraction each time.
7.1.1.2 Sampling operation
7.1.2 Sampling of bulk grease
7.1.2.1 Precipitate layer, emulsion layer and free
Extract bottom samples with bottom sampler. Determine whether there is
precipitate layer, emulsion layer and free water at tank bottom or cabin bottom.
Remove free water as much as possible before sampling. And according to the
contract requirements and the agreement of the parties concerned, measure
the amount of water removed.
7.2.1.1.2 Determination of sampling site
Based on different loading state, the sampling shall be performed according to
the following methods.
7.2.1.1.1.1, a representative sample shall be taken from the tank, and the
sample cannot be taken from the unloading warehouse.
7.2.1.2 Sampling operation
7.2.1.2.1 Single-sleeve sampler
Hold the handle of the sampler, flow mouth facing downwards. Insert from the
corner of the bag or the bag diagonally into 1/2 or more of the bag. Rotate the
sampler at 180°. Make the flow mouth upwards. Hold for a moment. Make the
cargo flow into the sampler probe.
7.2.1.2.2 Sampling shovel
According to different sampling method, the operation shall be performed as
follows.
7.2.1.2.3 Double-sleeve sampler
See 7.1.1.2.1.
7.2.2 Sampling of piece-packed grease
7.2.2.1 Sampling proportion of piece-packed grease
If it is considered that an inspection lot is fairly uniform, randomly select packed
cargo sampling. For different specifications of the packaging, the number of
samples can be according to the recommended values in Table 2.The quantity
of each sample shall be basically the same, the quantity shall be controlled over
100g, and the number of samples in each batch shall not be less than 1000g.
7.2.2.2 Sampling of piece-packed liquid grease
Plug the sampling tube with thumb, block the upper mouth and insert into the
bottom of the bucket. Check the bottom for clear water and impurities. Then
completely mix the grease in the bucket. Insert the sampling tube obliquely into
the bottom of the bucket.
8 Preparation of laboratory sample
8.1 Preparation of laboratory samples of cereals, oils and feedstuffs
8.1.1 Reduction method
8.1.1.1 Reduction method of sample divider
Keep the clean and dry sample divider steady. Turn off funnel switch. Pour the
sample into the funnel from 5cm above the funnel.
8.1.1.2 Method of quartering
Pour the sample on a clean, dry mixing table. Each hand holds one sample
dividing plate to shovel the sample from the left and right sides to about 10cm
height, aiming at the center and falling at the same time. Then change to its
vertical direction to perform the same operation (center point remains
unchanged). Repeatedly mix 4~5 times in this way.
8.1.1.3 Spoon sampling
Pour the sample in a clean, dry white porcelain square plate or on a sample
dividing table. Mix evenly and carefully with sample dividing plate. Tile into
uniform thickness squares. Divide grids. Use a spatula to scoop samples from
each grid, with no less than 16 samples, and the number of samples in each
grid shall be the same.
8.2 Preparation of grease laboratory sample
8.2.1 Preparation of bulk grease laboratory sample
Where tankers or tanks WITHOUT clear water and impurities at the bottom, the
extracted samples are representative samples of the tankers or tanks.
8.2.2 Preparation of piece-packed grease laboratory sample
The sample extracted according to sampling proportion and contained in the
mixing bucket shall be the laboratory sample of this batch of grease.
9 Number of sample
Under normal circumstances, determine the minimum amount of sample as
specified in Table 3.In special circumstances, it may be increased or decreased
as appropriate.
SN/T 0800.1-2016
SN
ENTRY-EXIT INSPECTION AND QUARANTINE INDUSTRY
Replacing SN/T 0800.1-1999
Inspection of cereals, oils and feedstuffs for import and
export - Methods of sampling and preparation of samples
Issued on. MARCH 9, 2016
Implemented on. OCTOBER 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 General... 7
5 Sampling and sample preparation tools and devices... 7
6 Sampling time, site... 11
7 Sampling methods... 11
8 Preparation of laboratory sample... 21
9 Number of sample... 23
10 Sample holding, identification and inspection... 23
11 Sampling report... 24
12 Specimen preparation... 24
Annex A (informative) Sampling tools... 27
Annex B (normative) Sample amount of inspection items of cereals, oils and
feedstuffs... 30
1 Scope
This Part of SN/T 0800 specifies the methods of sampling and preparation of
samples of inspection of cereals, oils and feedstuffs for import and export.
This Part is applicable to the sampling and sample preparation for inspection of
cereals, oils and feedstuffs for import and export.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 5494, Inspection of grain and oils - Determination of foreign matter and
unsound kernels of grain and oilseeds
GB/T 5502, Inspection of grain and oils - Determination of milling degree of
rice
GB/T 5524, Animal and vegetable fats and oils - Sampling
GB/T 10361, Wheat rye and respective flours durum wheat and durum wheat
semolina - Determination of the falling number according to Hagberg-Perten
GB/T 15687, Animal and vegetable fats and oils - Preparation of test sample
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in SN/T
0798 apply.
4 General
4.1 General provisions
In accordance with the provisions of SN/T 0799.
4.2 Batches
4.2.1 Batches of cereals, oils and feedstuffs
The requirements for batches are as follows.
4.2.2 Batches of grease
The amount of grease delivered in a single contract or transport document.
5 Sampling and sample preparation tools and devices
5.1 Single tube sampler
Applicable to the sampling of bagged cargo. There are three types that are
commonly used.
5.2 Double-sleeve sampler and slot receiver
Applicable to sampling of bulk static cargo.
According to the actual loading transport tools, the size of the cargo, the storage
of cargo, use double sleeve sampler of different specifications, length.
5.3 Sampling shovel
The shovel length is about 13cm, the width is about 8cm, the side height is
about 4cm, the handle length is about 8cm. See Figure A.1 of Annex A.
5.4 Automatic mechanical sampling device
Applicable to dynamic cargo sampling. The device mainly consists of four parts.
5.5 Deep-layer sampler
A semi-automatic sampling device that mainly consists of several connectable
stainless steel sampling tubes, an electric suction host, sample collection
device and base or strap, of which its sampling tube can be assembled to a
length of about 30m as required to extract deep-layer sample of the cargo.
5.6 Other sampling tools
5.6.1 ellis cup
A manual sampling device made of lightweight aluminum for drawing samples
from cargo running on conveyor belts.
5.9 Sample dividing cloth or suitable bedding
Plastic film or other material bedding for on-site sample processing.
5.10 Sample bag (tube)
Container made of strong, hygienic material that can seal.
5.11 Bottom sampler
This bottom sampler (see Figure A.2) is of stainless steel structure and is
suitable for withdrawing bottom samples from liquid oil contained in tanks or oil
tanks.
5.12 Simple counterweight sampling tank
The simple counterweight sampling tank (see Figure A.3) is suitable for
sampling at different depths in a variety of storage tank.
5.14 Tube sampler
Applicable to sampling of paste grease. (See Figure A.5). It is a stainless steel
device consisting of two concentric tubes of the same length and close together,
one of which can rotate in the other tube. Each tube has a longitudinal opening.
5.15 Sampling probe
Sampling probe (see Figure A.6) is used for stearin sampling. It is made of
stainless steel, with semi-circular or C-shaped cross section. When it is twisted
and inserted into grease, it shall obtain a sample of oil.
5.18 Sample bottle
Plastic bottle or glass bottle, capacity of 250mL ~ 1000mL.
5.19 Stainless steel spoon
Total length is 15cm ~ 20cm, handle length is 10cm ~ 15cm, the spoon is
elongated and elliptical.
5.20 Other sampling and sample preparation tools and devices
Other tools and devices for sampling and sample preparation.
6 Sampling time, site
6.1 Warehouse or storage tank sampling
The cargos are stored in warehouses, cabins or storage tanks, sampled in
batches.
6.2 Sampling when unloading
Perform cargo sampling during loading and unloading.
7 Sampling methods
7.1 Sampling of bulk cargo
7.1.1 Sampling of bulk cereals, oils and feedstuffs
7.1.1.1 Determination and requirements of sampling amount, site
7.1.1.1.2 Bulk stacking
The bulk open stacking sets a sampling zone with an area not exceeding 50m2,
a height of about 1.5m. 5 sampling points are evenly set up in each zone. When
it exceeds the specified area, it shall increase the number of sampling point
proportionally. Stacking height in principle does not exceed 1.5m.
7.1.1.1.4 Ship-cabin
Based on different loading number of single ship, perform the sampling
according to the following methods.
7.1.1.1.5 Silo
In general, no manual sampling is used in the silo. For silos with mechanized
sampling equipment, the cargo entering and exiting the silo adopts the device
specified in 5.4.Extract a small batch of samples when 1000t enters and exists
the silo. According to the unloading flow rate, set the device sampling frequency
at least 50 times.
7.1.1.1.6 Container bulk
If the number of cargo submitted for inspection of same inspection number,
same variety, same level is less than 10000t, extract one original sample per
500t. The sample number is not less than 5kg. When it is less than 500t, it shall
be calculated as 500t and extract one original sample.
7.1.1.1.7 Mobile cargo
If original samples are required taking from mobile cargo (conveyor, grab or
other loading device), it shall according to the loading conditions of original
cargo, refer to 7.1.1.1.1, 7.1.1.1.2, 7.1.1.1.3, 7.1.1.1.4, 7.1.1.1.5, 7.1.1.1.6,
determine the number of batches, number of samples. Then according to the
mass, delivery time and flow speed of the cargo to be inspected, estimate the
sampling interval time and number of extraction each time.
7.1.1.2 Sampling operation
7.1.2 Sampling of bulk grease
7.1.2.1 Precipitate layer, emulsion layer and free
Extract bottom samples with bottom sampler. Determine whether there is
precipitate layer, emulsion layer and free water at tank bottom or cabin bottom.
Remove free water as much as possible before sampling. And according to the
contract requirements and the agreement of the parties concerned, measure
the amount of water removed.
7.2.1.1.2 Determination of sampling site
Based on different loading state, the sampling shall be performed according to
the following methods.
7.2.1.1.1.1, a representative sample shall be taken from the tank, and the
sample cannot be taken from the unloading warehouse.
7.2.1.2 Sampling operation
7.2.1.2.1 Single-sleeve sampler
Hold the handle of the sampler, flow mouth facing downwards. Insert from the
corner of the bag or the bag diagonally into 1/2 or more of the bag. Rotate the
sampler at 180°. Make the flow mouth upwards. Hold for a moment. Make the
cargo flow into the sampler probe.
7.2.1.2.2 Sampling shovel
According to different sampling method, the operation shall be performed as
follows.
7.2.1.2.3 Double-sleeve sampler
See 7.1.1.2.1.
7.2.2 Sampling of piece-packed grease
7.2.2.1 Sampling proportion of piece-packed grease
If it is considered that an inspection lot is fairly uniform, randomly select packed
cargo sampling. For different specifications of the packaging, the number of
samples can be according to the recommended values in Table 2.The quantity
of each sample shall be basically the same, the quantity shall be controlled over
100g, and the number of samples in each batch shall not be less than 1000g.
7.2.2.2 Sampling of piece-packed liquid grease
Plug the sampling tube with thumb, block the upper mouth and insert into the
bottom of the bucket. Check the bottom for clear water and impurities. Then
completely mix the grease in the bucket. Insert the sampling tube obliquely into
the bottom of the bucket.
8 Preparation of laboratory sample
8.1 Preparation of laboratory samples of cereals, oils and feedstuffs
8.1.1 Reduction method
8.1.1.1 Reduction method of sample divider
Keep the clean and dry sample divider steady. Turn off funnel switch. Pour the
sample into the funnel from 5cm above the funnel.
8.1.1.2 Method of quartering
Pour the sample on a clean, dry mixing table. Each hand holds one sample
dividing plate to shovel the sample from the left and right sides to about 10cm
height, aiming at the center and falling at the same time. Then change to its
vertical direction to perform the same operation (center point remains
unchanged). Repeatedly mix 4~5 times in this way.
8.1.1.3 Spoon sampling
Pour the sample in a clean, dry white porcelain square plate or on a sample
dividing table. Mix evenly and carefully with sample dividing plate. Tile into
uniform thickness squares. Divide grids. Use a spatula to scoop samples from
each grid, with no less than 16 samples, and the number of samples in each
grid shall be the same.
8.2 Preparation of grease laboratory sample
8.2.1 Preparation of bulk grease laboratory sample
Where tankers or tanks WITHOUT clear water and impurities at the bottom, the
extracted samples are representative samples of the tankers or tanks.
8.2.2 Preparation of piece-packed grease laboratory sample
The sample extracted according to sampling proportion and contained in the
mixing bucket shall be the laboratory sample of this batch of grease.
9 Number of sample
Under normal circumstances, determine the minimum amount of sample as
specified in Table 3.In special circumstances, it may be increased or decreased
as appropriate.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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