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SN/T 0800.1-2016

Chinese Standard: 'SN/T 0800.1-2016'
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Detail Information of SN/T 0800.1-2016; SN/T0800.1-2016
Description (Translated English): Inspection of cereals, oils and feedstuffs for import and export - Methods of sampling and preparation of samples
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: B20
Word Count Estimation: 22,251
Date of Issue: 3/9/2016
Date of Implementation: 2016-10-01
Older Standard (superseded by this standard): SN/T 0800.1-1999
Drafting Organization: Shanghai Entry - Exit Inspection and Quarantine Bureau of the People Republic of China
Administrative Organization: Certification and Accreditation Administration of the People Republic of China
Regulation (derived from): National Quality Inspection [No. 2016] No. 131; Industry Standard Record Announcement No. 2016 (No. 201)
Proposing organization: Certification and Accreditation Administration of the People Republic of China
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China

SN/T 0800.1-2016
SN
ENTRY-EXIT INSPECTION AND QUARANTINE INDUSTRY
STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing SN/T 0800.1-1999
Inspection of cereals, oils and feedstuffs for import and
export - Methods of sampling and preparation of samples
进出口粮油, 饲料检验抽样和制样方法
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 
Foreword
SN/T 0800 consists of the following 20 parts.
- Part 1. Inspection of cereals, oils and feedstuffs for import and export -
Methods of sampling and preparation of samples;
- Part 2. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of crude fat;
- Part 3. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of crude protein;
- Part 4. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of urease activity;
- Part 5. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of starch content;
- Part 6. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of ash;
- Part 7. Inspection of cereals, oils and feedstuffs for import and export -
Method for the inspection of imperfect grains;
- Part 8. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of crude fibre content;
- Part 9. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of tannin content;
- Part 10. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of water absorption;
- Part 11. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of salt contents;
- Part 12. Inspection of cereals, oils and feedstuffs for import and export -
Method for the inspection of grain composition including whole kernels
and broken rice;
- Part 13. Inspection of cereals, oils and feedstuffs for import and export -
Method for the inspection of milling degree;
- Part 14. Inspection of cereals, oils and feedstuffs for import and export -
Method for the determination of germinative energy and germination;
- Part 15. Inspection of cereals, oils and feedstuffs for import and export -
Inspection of cereals, oils and feedstuffs for import and
export - Methods of sampling and preparation of samples
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
SN/T 0798, Inspection of cereals oils and feedstuffs for import and export -
Terminology for inspection
SN/T 0799, Inspection of cereals oils and feedstuffs for import and export -
General rules for the inspection
SN/T 0803.5, Oil bearing materials for import and export - Method for the
inspection of grade and uniformity
SN/T 2504, Technique procedures of quality inspection and quarantine for
imported and exported cereals
to samplings of beans, corns, feeds;
b) total length is 50cm, slot length is 40cm, slot width is 0.8cm ~ 1.5cm, outer
diameter is 1.6cm ~ 2.0cm, tip is about 4.0cm, solid cone; it is applicable
to samplings of small, medium grains, oilseeds, feeds;
c) total length is 55cm, slot length is about 35cm, slot width is 0.6cm ~ 0.7cm,
the maximum outer diameter is about 1cm, head-tip-shaped; it is
applicable to sampling of powder cargo.
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. The
commonly used one. total length is 110cm, handle length is 15cm, cone length
is 6.5cm, outer diameter of outer tube is 2.6cm, inner diameter is 2.0cm, with
four outlets with each outlet of 20cm×1.8cm. There are also other double-sleeve
standard samplers with total lengths of 250cm, 300cm, etc.
The slot receiver is made of tin or aluminum skin, of which the length is 100cm,
semi-cylindrical, opening width is 10cm, used to collect the sample collected by
double-sleeve sampler. Or it can use canvas of sufficient length to collect the
sample.
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.
a) shunt mechanical sampler;
b) rotary divider;
c) gravity divider;
d) rotary-table sampler.
The specific operation is carried out according to the specifications of each
sampling device.
5.5 Deep-layer sampler
A semi-automatic sampling device that mainly consists of several connectable
cylinder. A momentary pause between the opening of the inlet and outlet valves
is to ensure that the sample first enters the bottom of the cylinder and causes
a slight increase in the internal pressure of the cylinder to prevent the sample
from entering the top when the top valve is opened.
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. It consists of a stainless
steel cylinder (capacity of approximately 500mL), a counterweight with a
separate bottom and a tapered barrel neck. The metal ring fixed on both sides
of the cone neck has a ring at its highest point. The rope passes through the
ring and is tied to the cork of the conical barrel neck. Empty sampling tank with
cork drops to the specified depth of liquid grease. Urgently pull the rope and
unplug the cork, the tank shall be full of samples.
5.13 Sampling barrel with bottom valve
The sampling barrel with foot valve (see Figure A.4) is suitable for taking
samples from liquid oil contained in tanks or oil tanks. It is divided into two parts.
the upper and the lower. The top of the upper is open. The lower part is
equipped with a heavier screw mechanism on the outside of the barrel. A
lightweight self-weight valve is fixed at the bottom to ensure the stability of the
sampling device from bottom to top. When the sampling barrel falls in the liquid
grease, the pressure of the oil on the valve keeps the bottom open until the
grease flows evenly into the barrel. When it stops falling, the bottom valve
closes and the grease is drawn from the depth of the sampling barrel.
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.
In a certain position, the tube is opened so that the oil flows in, and the tube is
closed by turning the inner tube.
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.
5.16 Sampling tube
Made of thick-walled glass tube or stainless steel, suitable for liquid grease
sampling (see Figure A.7).
the cabin. After extracting the first batch of samples, a small batch of
samples shall be increased after every 1000t of loading and unloading.
When it is less than 1000t, it shall be calculated as 1000t. Each small
batch of samples shall be taken from at least 50 points so that the total
amount of small batches of original samples is not less than 8kg.
b) River steamer or small barge
For small river steamer or barge with loading number is 100t ~ 500t, the
sampling point setting shall be according to 7.1.1.1.2. Extract a small
batch of initial samples per loading and unloading about 500t. Each small
batch sample is drawn from at least 20 points. Total amount is not less
than 8kg. When the loading quantity is less than 500t, the loading of
different river steamer or small barges of the same variety and grade can
be used as a sampling batch. After combining the individual samples at
each sampling point, they are mixed into a small batch of initial samples
with a total amount of not less than 8kg.
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.
Silos without mechanized sampling device, according to the sampling tools
specified in 5.1, 5.2, 5.3, 5.4, according to the actual situation, use dynamic or
static sampling method to extract representative samples.
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. If the number of the
batches submitted for inspection is greater than 10000t, extract 20 original
samples from 10000t and take it as the base. The number of each sample is
not less than 5kg. For every additional 1000t, add one original sample. When it
is less than 1000t, it shall be calculated as 1000t and extract one original
sample.
For 5 or less containers, all samples shall be taken out of the containers. If there
are more than 5 containers, add 1 for every 5 additional containers. If less than
5 containers remain, one shall be taken. Randomly select 7 points in the
sampled container to collect samples. Try to ensure that the sampling points
are evenly distributed within the container. The sampling methods are as follows.
root of the number of bags (pieces) of a batch of cargo. See equation (1).
where,
N - Total bags (pieces) of a batch of cargo;
N - Number of pieces to be extracted (n value is integer; fractional part is
rounded up).
7.2.1.1.2 Determination of sampling site
Based on different loading state, the sampling shall be performed according to
the following methods.
a) If a warehouse or open-air sampling is implemented, sinusoidal curves
are taken around the stack, sampling points are randomly determined
from the upper, middle, and lower levels, and the sampling points are
determined according to 7.2.1.1.1.1. Take 5% randomly from the sample
package to carry out the ladle-to-ladle. Use sampling method of sampling
shovel combining with the ladle-to-ladle to extract the sample. If it is found
that the difference between packages is obvious or other abnormal
conditions, it shall increase the number of the ladle-to-ladle. When using
a single or double-sleeve sampler, the length of the sampler shall be more
than 65% of the length of the bag or at least 1/2 of the bag length.
b) If sampling is performed during the loading and unloading process,
according to the loading and unloading speed and the number of pieces
to be pumped in each batch, extract the sample evenly and intermittently,
or use the dump-package to extract the sample concentratedly.
c) When loading bagged cargo with ships, trucks, wagons, extract the
sample according to the method in a).
d) When the container is loaded with bagged cargo, if the remaining space
in the container is large, the personnel can access the sample by referring
to the method in a). If more than one person is unable to enter the site and
the site is able to pick it up, according to the number of sampling points in
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. Hold the flow mouth in the upward direction
and pull the sampler out. Pour the sample from the handle end into the sample
bag. Follow the above operations to extract the packages to be extracted till the
total number of packages to be extracted. The number of samples per single
plant shall be basically the same. Mix the samples of single plant to form original
sample.
When using single-sleeve sampler to extract the bagged sample, it shall
randomly take 5% from the packages extracted for the ladle-to-ladle inspection
sample. If it is found that the difference between the packages is obvious or
other abnormal conditions, the number of ladle-to-ladle shall be increased and
the sample shall be taken with a sampling shovel. For large-grained, large-
grained packaging feeds that are not suitable for sampling with a single-sleeve
sampler and large grains such as peanuts, broad beans and large cowpeas as
well as oilseeds (grass seed, cottonseed, etc.), it shall perform ladle-to-ladle,
unpacking. The number for ladle-to-ladle shall not be less than 20% of the
extracted number. Extract sample with sampling shovel.
7.2.1.2.2 Sampling shovel
According to different sampling method, the operation shall be performed as
follows.
a) Ladle-to-ladle sampling. place the bagged cargo on clean canvas or
cement countertop. Remove the seam line. Lay down slowly. Hold both
ends of the bag tightly with both hands. Lift to a height of about 50cm. Pull
down about 1.5m long. Pour all out. Extract the sample from the middle
and bottom of the equivalent of the bag with a sampling shovel. The
number extracted from each package, each point shall be the same.
b) Unpacking sampling. open the bag seam. Use a sampling shovel to
extract the desired sample from the top. The number of sample extracted
from each bag shall be the same.
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
Keep the clean and dry sample divider steady. Turn off funnel switch. Pour the
sample into the funnel from 5cm above the funnel. Turn on funnel switch. After
sample flow is finished, tap the sampler housing and close the funnel switch.
Then pour all the samples in the sample holder into the funnel at the same time.
Continue mixing twice or three times according to the above method. Each time
afterwards, use a sample in the sample holder to continue sample separation
according to the above method until the sample in the sample holder
approaches the required amount.
8.1.1.2 Method of quartering
Pour the sa......
Related standard:   SN/T 0800.7-2016  SN/T 0800.4-2015
   
 
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