DRAFT UGANDA STANDARD  
  DUS 334 
Second  Edition  
2019 -mm-dd 
 
 
 Reference number  
DUS 334: 2019 
© UNBS 2019   
  
Barley grains — Specification  
 DUS 334: 2019  
ii © UNBS 2019  – All righ ts reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct applicatio n 
© UNBS 2019   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
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The Executive Director  
Uganda National Bureau of Standards  
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Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 334:2019  
© UNBS 2019  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4  Requirements  ................................ ................................ ................................ ................................ .........  3 
4.1 General requirements  ................................ ................................ ................................ ...........................  3 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  3 
5 Contaminants  ................................ ................................ ................................ ................................ .........  4 
5.1 Heavy metals  ................................ ................................ ................................ ................................ ..........  4 
5.2 Pesticide residues  ................................ ................................ ................................ ................................ . 4 
5.3 Mycotoxins  ................................ ................................ ................................ ................................ .............  4 
6 Hygiene  ................................ ................................ ................................ ................................ ...................  5 
7 Packaging  ................................ ................................ ................................ ................................ ...............  5 
8 Weights and measures  ................................ ................................ ................................ .........................  5 
9 Labelling  ................................ ................................ ................................ ................................ .................  5 
9.1 General  ................................ ................................ ................................ ................................ ...................  5 
9.2 Labelling of non -retail containers  ................................ ................................ ................................ ........  6 
10 Sampling  ................................ ................................ ................................ ................................ ................  6 
Annex  A (informative) Guide for grading of barley grains  ................................ ................................ .............  7 
Bibliography  ................................ ................................ ................................ ................................ ........................  8 
 
  DUS 334: 2019  
iv © UNBS 2019  – All righ ts reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of stand ards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, priva te sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for app roval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 2, Food and Agriculture , 
Subcommittee SC 3, Cereals, pulses and related  products . and processes  
This second edition cancels and replaces the first edition ( US 334:2001 ), which has been technically revised.  
  DRAFT UGANDA STANDARD  DUS 334: 2019  
 
© UNBS  2019  – All rights reserved  1 
 Barley grains — Specification  
1 Scope   
This committee Draft Uganda Standard specifies the requirements , test and sampling methods for kernels of  
cultiv ated barley  (Hordeum vulgare  L.) intended for human  consumption  
2 Normative  references   
The following referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated referen ces, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
US 28 EAS 39, Code of practice for Hygiene in the Food and Drink Manufacturing Industry  
US EAS 38 , Labelling of p re-packaged foods - General requirements  
US EAS 900 , Cereals  and pulses — Sampling  
US EAS  901, Cereals and pulses – Test methods  
US ISO 6561 -1, Vegetables and derived products: -Determination of cadmium content -Part 1: Methods using 
graphite furnace atomic absorption spectrometry  
US ISO 6633,  Fruits, vegetables and derived products — Determination of lead content — Flameless atomic 
absorption spectrometric method  
US ISO 2048 3, Cereals and pulses — Determination of the nitrogen content and calculation of the crude 
protein content - Kjeldahl method  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Onlin e browsing platform: available at http://www.iso.org/obp  
3.1 
broken kernel s 
pieces that are less than three -quarters of a whole kernel and kernels with the germ end broken off  
3.2 
mildew  
fungal condition that develops  in unthreshed grain usually under conditions of excessive moisture  and t he 
affected kernels are grayish in colour  DUS 334: 2019  
2 © UNBS 2019  – All rights reserved  
 3.3 
heated kernels  / black heads  
have the colour or odour typical of grain that has deteriorated in storage or has been damaged by artificia l 
drying. The hull over the germ of the heated kernels often appears discoloured, usually  from pale golden/ 
yellow  to a golden brown   
3.4 
rotten kernels  
are discoloured, swollen, soft and spongy as a result of decomposition by fungi or bacteria.  
3.5 
sprou ted kernels  
are germinated kernels  
3.6 
foreign mat ter 
all organic and inorganic material (such as san d, soil, glass) other than barley , broken kernels and other 
grains  
3.6.1 
inorganic matter  
stones, glass, pieces of soil and other mineral matter  
3.6.2 
organic matter  
any animal or plant matter (seed coats, straws, weeds) other than grain of barley, damaged barley  grain, other 
grains, inorganic extraneous matter and harmful/toxic seeds  
3.7 
harmful/noxious seeds  
seeds which can have a damaging or dangerous e ffect on health, sensory properties or technological 
performance. These include Crotolaria ( Crotalaria spp .), Corn cockle ( Agrostemma githago L.), Castor bean 
(Ricinus communis L.), Jimson weed ( Datura spp.)  
3.8 
Other  grains  
edible grains, whole or broken,  other t han barley  (i.e., cereals, pulses and other edible legumes)  
3.9 
Immature/green kernels  
grains which are underdeveloped, thin and papery in appearance  
3.10 
test weight  
weight of a measured volume of grain expressed in kilograms per hectolitre.  
3.11  
filth 
impurities of animal origin  
3.12 
practically free  
without defects in excess of those that can be expected to result from, and be consistent with good cultural 
and handling practices employed in the production and marketing of the barley grains  DUS 334: 2019  
© UNBS  2019  – All rights reserved  3 
 4  Requirements  
4.1 General requirements  
Barley  grains shall be:  
a) bright, clear appearance, natural smell and colo ur. 
b) dry and mature   
c) free from abnormal flavour, odours, liv e insects  and filth and; 
d) practically free from noxious or harmful seeds in amounts tha t could be harmful to human health  
4.2 Specific requirements  
Barley  grain shall comply with maximum limits given in Table 1 when tested in accordance with the test 
methods specified therein  DUS 334: 2019  
4 © UNBS 2019  – All rights reserved  
  
Table 1 —Specific requirements for barley grain  
S/N Characteris tic Limit  Test method  
 
i.  Moisture , % m/m , max.  14.0   US EAS 90 1 
ii.  Crude protein (on dry matter basis), 
% m/m, min.  7.0 US ISO 20483  
 
iii.  Immature grains  0.5  
US EAS 901  
 iv.  Test weight , kg/hI, max . 65 
v.  Heated  kernel , rotte n kernel , 
mildewed , max. 0.2 
vi.  Sprouted /germinated, m ax. 0.5 
vii.  Other  grains, m ax. 1.5 
viii.  Broken kernels , max. 4.0 
ix.  Inorganic matter, % m/m, max  
 0.25 
x.  Insect  damage  0.1 
xi.  foreign mat ter, % m/m, max.  1.5 
xii.  Filth  0.1 
 
5 Contaminants  
5.1 Heavy metals  
Barley grain  shall comply with maximum  limits for heavy metals  given in Table 2 when tested in accordance 
with the test methods specified there in  
Table 2  — Heavy metals  maximum limits for barley grains  
Heavy metals  Maximum limit  
mg/kg Test method  
Cadmium  0.1 US ISO 6561 -1 
Lead 0.2 US ISO 6633  
5.2 Pesticide residues  
Barley  grain  shall comply with those maximum residue limits established by the Codex Alimentarius 
Commission for this commodity   
5.3 Mycotoxins  
Barley  grain shall comply with the maximum limits  for mycotoxins given i n Table 3  when tested in accordance 
with the test methods specified  therein . DUS 334: 2019  
© UNBS  2019  – All rights reserved  5 
 Table 3  — Mycotoxins limits for barley grains  
Mycotoxin  Maximum limit 
μg/kg  Test method  
Total aflatoxin  10  
US EAS 901  Aflatoxin  B1 5 
 
6 Hygiene  
Barley grains shall be handled in accordance with  US 28 EAS 39.  
7 Packaging  
Barley grains shall be packaged in food grade  packaging  materials  that will safe guard the hygienic , nutritional 
and organoleptic qualities of the products . Each package  shall be securely sealed.  
8 Weights and measures  
Barley grains shall  be packaged in accordance with the weights and measures regulations  for Uganda  
9 Labelling   
9.1 General   
In additio n to the requirements in US EAS 38, each package shall be legibly and indelibly labelled with the 
following:  
a) name of the product  as “Barley grain s; 
b) name, address and physical location of the producer/packer/importer;  
c) lot/batch/code number ;  
d) net weight, i n kilograms;  
e) Declaration ”Food for Human Consumption ; 
f) storage instruction as “Store in a cool dry place away from any contaminants ;  
g) crop year;  
h) packing date;  
i) instructions on disposal of used package;  
j) country of origin; and  
k) declaration on whether the b arley was genetically modified, where applicable  DUS 334: 2019  
6 © UNBS 2019  – All rights reserved  
 9.2 Labelling of non -retail containers  
9.2.1  Information detailed in  9.1 shall be given either on the container or in accompanying documents, 
except that the name of the product, lot identification and the name and address of the processor or packer as 
well as storage instructions, shall appear on the container.  
9.2.2 However, lot identification and the name and address of the processor or packer may be replaced by 
an identification mark provided that such a  mark is clearly identifiable with the accompanying documents.  
10 Sampling  
Sampling shall  be carried out in accordance with  US EAS 900  DUS 334: 2019  
© UNBS  2019  – All rights reserved  7 
 Annex  A 
(informative)  
Guide for grading of barley grains  
A.1 The grading shall be performed as follow:  
A.1.1  Draw and we ight a test portion (about 100g)  
A.1.2  Separate the test portion into component groups  
A.1.3  Weigh materials of the component groups  
A.1.4  Express the amount of material groups in percentage (see guide in table 2 ) 
Table 3:—Record sheet for grading of ba rley grain  
 
Mass of the test portion  
(grams)  
 
Component  Mass of component  
(grams)  Result calculation  
(expressed in %)  
Broken kernels  a = a x 100 / M  
Heated, rotte n, mildewed  b = b x 100 / M  
Immature / green kernels  c =c x 100 / M  
Sprouted  d = d x 100 / M  
Insect damaged  e = e x 100 / M  
Filth  f = f x 100 / M  
Other grains  g = g x 100 / M  
Inorganic matter  h = h x 100 / M  
Total foreign mat ter   = (f + g+ h )x 
100 / M  
 
 DUS 334: 2019  
8 © UNBS 2019  – All rights reserved  
 Bibliography  
[1] Codex Standard for Sorghum grains CODEX STAN CXS 172 -1989   
[2] Official Grain Grading Guide_6.Barley_ Canadian Grain Commission. August  1, 2018  
[3] WFP  Technical Specifications for BARLEY GRAIN  24 July 2014  
[4] US EAS 2:2017 , Maize grain s — Specification  
[5] US EAS 757:2019 , Whole sorghum grains — Specification  
[6] US EAS 758:2019 , Finger millet grains — Specification  
 DUS 334: 2019  
© UNBS  2019  – All rights reserved  9 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certifi cation Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uga nda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark schem e of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of S tandards.  
 
 DUS 334: 2019    
 
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© UNBS 2019 – All rights reserved