Voluntary Report - Public distribution

**Date:** 11/12/2008

**GAIN Report Number:** CH8100

CH0000

**China, Peoples Republic of**

**FAIRS Subject Report**

**Grain and Oilseed Standards**

**2008**

**Approved by:**

![](media/image1.wmf)Mark Petry

AgBeijing

**Prepared by:**

Wu Bugang

**Report Highlights:**

On July 3, 2008, China notified the WTO of the National Standard GB
1353---2007 \"National Standard for Corn\" as TBT/N/CHN/403 and National
Standard GB-1532-2006 \"National Standard for Soybeans\" as
TBT/N/CHN/402. These standards specify the relevant terms and
definitions, classifications, quality requirements, test methods, and
requirements for labeling, packaging, transportation and storage of corn
and soybeans. National Standard is GB/T 5494 Inspection of Grain and
Oilseeds - Methods for Determination of Foreign Matter and Unsound
Kernels is referenced in that standard and published here as a reference
in reviewing TBT/N/CHN/402 and 403. This report is an UNOFFICIAL
translation of GB/T 5494.

Includes PSD Changes: No

Includes Trade Matrix: No

Annual Report

Beijing \[CH1\]

\[CH\]

**Executive Summary**: On July 3, 2008, China notified the WTO of the
National Standard GB 1353---2007 \"National Standard for Corn\"
(Replacing GB 1353-1999) as TBT/N/CHN/403. This standard specifies the
relevant terms and definitions, classifications, quality requirements,
test methods, and requirements for labeling, packaging, transportation
and storage of corn. This standard also applies to testing, evaluation
and identification of the quality of corn. The date for submission of
final comments to the WTO is September 3, 2008. The proposed date of
adoption is 90 days after circulation by the WTO Secretariat (October 3,
2008) and the proposed date of entry into force is 6 months after
adoption (January 3, 2009). This is notified as GAIN Report CH8069.

On July 3, 2008, China notified the WTO of the National Standard
GB-1532-2006 \"National Standard for Soybeans\" (Replacing GB 1352-1986)
as TBT/N/CHN/402. This standard specifies the relevant terms and
definitions, classifications, quality requirements, test methods, and
requirements for labeling, packaging, transportation and storage of
soybeans. This standard also applies to testing, evaluation and
identification of the quality of commercial soybeans. The date for
submission of final comments to the WTO is September 3, 2008. The
proposed date of adoption is 90 days after circulation by the WTO
Secretariat (October 3, 2008) and the proposed date of entry into force
is 6 months after adoption (January 3, 2009). This is notified as GAIN
Report CH8066.

One of the measures that is referenced in the proposed National Standard
is GB/T 5494 Inspection of Grain and Oilseeds - Methods for
Determination of Foreign Matter and Unsound Kernels. This standard has
not been notified to the WTO. This National Standard, along with other
standards published in GAIN Reports CH8097-CH8105, is being published so
that GB 1353---2007 \"National Standard for Corn\" TBT/N/CHN/403 and
GB-1532-2006 \"National Standard for Soybeans\" TBT/N/CHN/402 can be
reviewed with this additional pertinent information.

Thanks go to the United States Soybean Export Council -- International
Marketing and the U.S. Grains Council for their support in translating
this measure.

**BEGIN TRANSLATION**

**National Standard of the People's Republic of China**

**GB 5494-85**

**Inspection of Grain and Oilseeds - Methods for Determination of
Foreign Matter and Unsound Kernels**

Issued on Nov. 2, 1985 Implemented on July 1, 1986

This standard is applicable to the inspection of the foreign matter and
unsound kernels of commodity grain and oilseeds.

**1** **Inspection of Foreign Matter**

1.1 Instruments and Apparatus

1.1.1 Balance: Sensitivity 0.01g, 0.1g;

1.1.2 Grain jig;

1.1.3 Electric sizer;

1.1.4 Sampling splitter and sampling split plate;

1.1.5 Analytical pan, forceps etc.

1.2 Test Sample

> Test sample for inspection of the foreign matter is mainly divided
> into two types, the bulk sample and the laboratory sample, of which
> the bulk sample is used to inspect the foreign matter in bulk sample,
> including the bulk foreign matters and the undersize product of the
> absolute jig layer while the laboratory sample is used to inspect the
> side-by-side foreign matter of approximately the same size with grain
> kernels of few test samples that are collected from the foreign
> matters in bulk samples that have been inspected. For the dosage of
> the test sample inspected for the foreign matter, please refer to the
> table below:

Specified Table of Test Sample Dosage for Inspection of the Foreign
Matter

  -------------------- -------------------------- ----------------------------------------------------
  Description of Grain Weight of Bulk Sample(g)   Weight of Laboratory Sample(g)
  and Oilseeds                                    

  Small-sized kernels: 500                        10
  millet, sesame,                                 
  rapeseeds etc                                   

  Medium-sized         500                        50
  kernels: paddy rice,                            
  wheat, sorghum,                                 
  small bean,                                     
  cottonseeds etc                                 

  Large-sized kernels: 500                        100
  soybean, corn, pea,                             
  sunflower seeds,                                
  small-sized                                     
  horsebean etc.                                  

  Extra-sized kernels: 1000                       200
  peanut in shell,                                
  peanut kernel,                                  
  castor seeds, tung                              
  seeds, tea seeds,                               
  shinyleaf                                       
  yellowhorn,                                     
  large-sized                                     
  horsebean etc                                   

  Others: sweet potato 500\~1000                  ![](media/image2.wmf){width="0.3229166666666667in"
  slices, barnyard                                height="0.13541666666666666in"}
  millet with hull in                             
  rice and paddy                                  
  kernel inspection                               
  -------------------- -------------------------- ----------------------------------------------------

1.3 Screening

1.3.1 Screening with electric sizer: fix the jig layer properly as
stipulated in the quality standard (put the big hole jig above, the
small hole jig below and cover the jig bottom), weigh and put test
sample as stipulated into the jig, cover the jig then put it on the
electric sizer and power on, the jig screens towards right and left
respectively for 1 minute (110\~120 rpm) automatically, then stand for
few minutes, put the oversize product and the undersize product into the
analytical pan respectively. The kernels which are blocked inside of jig
pore are oversize product.

1.3.2 Manual screening: fix the jig layer properly according to the
method above, put the test sample in and cover the jig cover. Put the
jig on plate glass or smooth table top, screen by hand at a speed of
110\~120 rpm for one minute both clockwise and counterclockwise. The
range of screening can be controlled in an area of 8\~10cm wider than
the diameter of the jig. The operation after the screening is the same
as the method above.

1.4 Inspection of foreign matter in bulk sample

1.4.1 Operation method: Weigh and take test sample (*W*) from the
average sample as stipulated in 1.2, screen the test sample twice
according to the screening method (the extra-sized grain and oilseeds
should be screened 4 times), then pick out and weigh the oversize
foreign matter and undersize product(*W*~1~). (The oversize foreign
matters wheat should be picked out from the 4.5mm jig).

1.4.2 Calculation of results

> The content of foreign matter in bulk sample should be calculated as
> formula (1):
>
> Foreign matter in bulk sample (%) =
> ![](media/image3.wmf){width="2.602777777777778in"
> height="0.2548611111111111in"}
>
> Where: *W*~1~- weight of foreign matter in bulk sample, g;
>
> *W*- weight of bulk sample, g.
>
> The allowable deviation between dual test results should not exceed
> 0.3%. Figure out their average value and take the first digit after
> the decimal point as the inspection result.
>
> 1.5 Inspection of foreign matter in laboratory sample

1.5.1 Operation method: Measure and take test sample (*W*~2~) from the
sample which has been inspected for the foreign matter in bulk sample as
stipulated in 1.2, put them into the analytical pan, pick out the
foreign matter as stipulated in the quality standard, then weigh them
up(*W*~3~).

1.5.2 Calculation of results

> The content of foreign matter in laboratory sample should be
> calculated as formula (2):
>
> Foreign matter in laboratory sample (%) =
> (100-*M*)$\frac{W_{3}}{W}$\...\...\...\...\...\...\..... (2)
>
> Where: *W*~3~- Weight of foreign matter in laboratory sample, g;
>
> *W*~2~- Weight of laboratory sample, g;
>
> *M*- Percentage of foreign matter in bulk sample, %.
>
> The allowable deviation between dual test results should not exceed
> 0.3%. Figure out their average value and take the first digit after
> the decimal point as the inspection result.

1.6 Inspection of the mineral

1.6.1 Operation method: For those stipulated with mineral index in the
quality standard, take the mineral picked from the foreign matter in
laboratory sample(except rice) , then weigh them up (*W*~4~)

1.6.2 Calculation of results

> The content of mineral should be calculated as formula (3):
>
> Mineral (%) =
> (100-*M*)$\frac{W_{4}}{W_{2}}$.......................................
> (3)$$
>
> Where: *W*~4~- Weight of mineral, g;
>
> *W*~2~-Weight of laboratory sample, g;
>
> *M*- Percentage of foreign matter in bulk sample, %.
>
> The allowable deviation between dual test results should not exceed
> 0.1%. Figure out their mean value and take the second digit after the
> decimal point as the inspection result.

1.7 Calculation of the total content of foreign matter

> The total content of foreign matter content in common grain and
> oilseeds should be calculated as formula (4):
>
> The total content of foreign matter (%) =
> *M*+*N*.........\...\...\...\...\...\...\...\...\.... (4)
>
> Where: *M*- Percentage of foreign matter in bulk sample, %;
>
> *N*- Percentage of foreign matter in laboratory sample, %.
>
> Take the first digit after the decimal point as the inspection result.

1.8 Inspection of foreign matter in rice

1.8.1 Inspection of bran powder

1.8.1.1 Operation method: Weigh and take test sample about 200g (*W*)
from average sample, put them twice into a round hole jig with a
diameter of 1.0mm, screen them by the screening method in 1.3, pour the
test sample out and pat the jig to make the bran powder falls into jig
bottom. After screening of the whole test samples, brush the bran powder
that retains on the jig layer, weigh all the bran powder together
(*W*~1~).

1.8.1.2 Calculation of results

> The bran powder content should be calculated as formula (5):
>
> Bran powder (%) = ![](media/image4.wmf){width="3.6659722222222224in"
> height="0.28680555555555554in"}
>
> Where: *W*~1~- Weight of bran powder, g;
>
> *W*- Weight of test sample, g.
>
> The allowable deviation between dual test results should not exceed
> 0.04%. Figure out their average value and take the second digit after
> the decimal point as the inspection result.

1.8.2 Inspection of mineral

1.8.2.1 Operation method: pick out the mineral from the test sample in
which the bran powder has been inspected and weigh them up (*W*~2~).

1.8.2.2 Calculation of results

> The mineral content should be calculated as formula (6):
>
> Mineral (%) =
> $\frac{W_{2}}{W} \times \text{100}$..............................................
> (6)
>
> Where: *W*~2~- Weight of mineral, g;
>
> *W*- Weight of test sample, g.
>
> The allowable deviation between dual test results should not exceed
> 0.005%. Figure out their average value and take the second digit after
> the decimal point as the inspection result.

1.8.3 Inspection of other foreign matter

1.8.3.1 Operation method: pick out the paddy kernel, barnyard millet and
other foreign matter from the test sample in which the bran powder and
mineral have been inspected, weigh them up together (*W*~3~).

1.8.3.2 Calculation of results

> The other foreign matter content should be calculated as formula (7):
>
> Other foreign matter (%) =
> $\frac{W_{3}}{W} \times \text{100}$.......................................\...
> (7)
>
> Where: *W*~3~- Weight of paddy kernel, barnyard millet and other
> foreign matter, g;
>
> *W*- Weight of test sample, g.
>
> The allowable deviation between dual test results should not exceed
> 0.04%. Figure out their average value and take the second digit after
> the decimal point as the inspection result.

1.8.4 Inspection of barnyard millet with hull and paddy kernel

> Take 500g test sample from the average sample respectively, pick out
> the barnyard millet with hull and paddy kernel, and calculate their
> content respectively. The kernel number that has been picked out
> multiplied by 2 is the inspection result, expressed as Kernel/kg.
>
> The allowable deviation between dual test results should not exceed 3
> Kernels/kg for millet with hulls and 2 Kernels/kg for paddy rice
> kernels. Figure out their average values respectively and take it as
> the inspection result. The average value that is less than 1 kernel
> should be calculated as 1 kernel.

1.8.5 Calculation of total content of foreign matter in rice

> The total content of foreign matter in rice should be calculated as
> formula (8):
>
> Total content of foreign matter in rice (%) =
> *A*+*B*+*C*.....................\.... (8)
>
> Where: *A*- Percentage of bran powder;
>
> *B*- Percentage of mineral;
>
> *C*- Percentage of other foreign matter.
>
> Take the second digit after the decimal point as the calculation
> result.

**2 Inspection of Unsound Kernels**

2.1 Operation method: pick out the unsound kernels as stipulated in
quality standard while inspecting the foreign matter in laboratory
sample and weigh them up (*W*~1~)

2.2 Calculation of results

> The content of unsound kernels should be calculated as formula (9):
>
> Unsound kernels (%) =
> $(\text{100} - M) \times \frac{W_{1}}{W}$.......................................
> (9)
>
> Where: *W*~1~- Weight of unsound kernels, g;
>
> *W*- Weight of test sample, g;
>
> *M*- Percentage of foreign matter in bulk sample, %.
>
> The allowable deviation between dual test results should not exceed
> 1.0% for large-sized and extra-sized kernel grain; 0.5% for
> medium-sized and small-sized kernel grain. Figure out their average
> value and take the first digit after the decimal point as the
> inspection result.

**3 Calculation of Pure Kernel Yield (Pure Rate) of Grain**

3.1 Calculation of pure kernel yield (pure rate) of cleaned grain

> Pure kernel yield (pure rate) of cleaned grain should be calculated as
> formula (10):
>
> Pure kernel yield (%) =
> $\frac{W - W_{1} \div 2}{W} \times \text{100}$..........................
> (10)
>
> Where: *W*~1~- Weight of unsound kernels, g;
>
> *W*- Weight of test sample, g.

3.2 Calculation of pure kernel yield (purity rate) of rough grain

> Pure kernel yield (purity rate) of rough grain should be calculated as
> formula (11)
>
> Pure kernel yield (%) =
> $\frac{W - (W_{2} + W_{1} \div 2)}{W} \times \text{100}$..............
> (11)
>
> Where: *W*~1~- Weight of unsound kernels, g;
>
> *W*~2~- Weight of foreign matter, g;
>
> *W*- Weight of test sample, g.
>
> Take the first digit after the decimal point as the calculation
> result.

**Additional Explanation:**

This national standard was proposed by the Ministry of Commerce of PRC.

This standard was drafted by the Grain Storage and Transport Bureau, the
Ministry of Commerce.

Major draftsmen of this standard are Gao Xiuwu, Yang Haoran, Wu Yanxia,
and Lv Guifen.