ICS 67.060 
 
 Reference number  
DRS 468 : 2021  
© RSB 2021  
  
 RWANDA 
STANDARD  DRS  
468 
 
First edition  
2021 -mm-dd 
 
Malted sorghum grains — Specification  
   
DRS 468 : 2021  
©RSB 2021  - All rights reserved                  ii 
 In order to match with technological development and to keep continuous progress in industries, 
standards are subject to periodic review. Users shall ascertain that they are in possession of the latest 
edition  
 
 
 
 
 
 
 
 
© RSB 2021  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized 
in any form or by any means, electronic or mechanical, including photocopying and microfilm, without 
prior written permission from R SB. 
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Website: www.rsb.gov.rw  
ePortal: www.portal.rsb.gov.rw  DRS 468 : 2021  
iii                ©RSB 2021  - All rights reserved  
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ...................  iv 
1 Scope  ................................ ................................ ................................ ................................ .............  1 
2 Normative references  ................................ ................................ ................................ ...................  1 
3 Terms and definitions  ................................ ................................ ................................ ..................  2 
4 Requirements  ................................ ................................ ................................ ................................  2 
4.1 Raw materials  ................................ ................................ ................................ ...............................  2 
4.2 Optional ing redients  ................................ ................................ ................................ .....................  2 
4.3 General requirements  ................................ ................................ ................................ ..................  3 
4.4 Specific requirements  ................................ ................................ ................................ ..................  3 
5 Hygiene  ................................ ................................ ................................ ................................ ..........  3 
6 Contaminants  ................................ ................................ ................................ ................................  4 
6.1 Pesticides residues  ................................ ................................ ................................ ......................  4 
6.2 Heavy metals  ................................ ................................ ................................ ................................ . 4 
6.3 Mycotoxins  ................................ ................................ ................................ ................................ .... 4 
7 Packaging  ................................ ................................ ................................ ................................ ...... 4 
8 Labelling  ................................ ................................ ................................ ................................ ........  4 
9 Sampling  ................................ ................................ ................................ ................................ ....... 5 
 DRS 468 : 2021  
©RSB 2021  - All rights reserved                  iv 
 Foreword  
Rwanda Standard s are prepared  by Technical Committees and approved by R wanda Standards Board (RSB) 
Board  of Directors in  accordance with the procedures of RSB, in compliance with Annex 3 of the WTO/TBT 
agreement on the preparation, adoption and application of standards.  
The main task o f technical committees is to prepare national standards.  Final Draft Rwanda S tandards adopted 
by Technical committ ees are ratified  by me mbers of RSB Board of Director s for publication and gazettment as 
Rwanda Standards.  
DRS 468  was prepared by Technical Co mmittee RSB/TC 003 on Cereals, pulses, legumes and cereal products . 
Committee membership  
The following organizations were represented on the Technical Committee on  Cereals, pulses, legumes and 
cereal products. (RSB/TC 003) in the preparation of this standard.  
Adma International Ltd  
Green Rev Ltd  
Manosalwa Food Industries Ltd  
Nyabihu TVET School  
Nyarutarama Business Incubation Centre  
Soma Gacye Ltd  
UR-CAVM  
Urwibutso Ese  
Rwanda  Standards Board ( RSB) – Secretariat  
  DRS 468:  2021  
1                ©RSB 2021  - All rights reserved  
 Malted sorghum grains  — Specification  
1 Scope  
This Draft  Rwanda Standard specifies requirements,  sampling and test methods for malted sorghum grains  of 
varieties (cultivars) grown from Sorghum bicolor  (L.) Moench intended  for human consumption or further 
processing . 
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.  
ISO 15214 , Microbiology of food and animal feeding stuffs — Horizontal method for the enumeration of 
mesophilic lactic aci d bacteria — Colony -count technique at 30 degrees C  
RS CAC/RCP 1, Code of practice — General principles of food hygiene   
RS CODEX STAN 192, General standard for food additives   
RS CODEX STAN 193, Codex general standard for contaminants and toxins in food and feed   
RS EAS 12, Potable water — Specification  
RS EAS 38, Labelling of pre - packaged foods — General requirements   
RS EAS 757, Whole sorghum grains — Specification  
RS ISO 16649 -2, Microbiology of food and animal feeding stuffs — Horizontal method for th e enumeration of 
beta-glucuronidase -positive Escherichia coli — Part 2: Colony -count technique at 44 degrees C using 5 -bromo -
4-chloro -3-indolyl beta -D-glucuronide  
RS ISO 21527 -2, Microbiology of food and animal feeding stuffs — Horizontal method for the en umeration of 
yeasts and moulds — Part 2: Colony count technique in products with water activity less than or equal to 0.95  
RS ISO 2171, Cereals, pulses and by -products — Determination of ash yield by incineration  
RS ISO 24333, Cereals and cereal products — Sampling  
RS ISO 24557, Pulses — Determination of moisture content — Air-oven method  
RS ISO 5498, Agricultural food products — Determination of crude fibre content — General method   
©RSB 2021  - All rights reserved                  2 
 RS ISO 605, Pulses — Determination of impurities, size, foreign odours, ins ects, and species and variety — 
Test methods  
RS ISO 6579 -1, Microbiology of the food chain — Horizontal method for the detection, enumeration and 
serotyping of Salmonella — Part 1: Detection of Salmonella spp. — Amendment 1: Broader range of incubation 
temperatures, amendment to the status of Annex D, and correction of the composition of MSRV and SC  
3 Terms and definitions  
For the purposes of this standard, the follow ing terms and definitions apply.  
3.1 
malted sorghum grains  
germinated  and dried  sorghum grain s  
3.2 
foreign matter  
organic and inorganic materials other than dried malted sorghum grain s 
3.3  
food grade packaging material  
packaging material, made of substances which are safe and suitable for their intended use and which will not 
impart any toxic su bstance or undesirable odour or flavour to the product  
4 Requirement s 
4.1 Raw material s 
The following raw materials shall be used in manufacturing malted sorghum grains:  
a) sorghum grains from which the malt is obtained shall comply with RS EAS 757; and   
b) potable wa ter complying with RS EAS 12 . 
4.2 Optional ingredients  
The following optional ingredients may be used:  
a) suitable ash from glasses and/or plant leaves ; and  
b) suitable food additives complying with RS CODEX STAN 192 . DRS 468:  2021  
3                ©RSB 2021  - All rights reserved  
 4.3 General requirements  
Malted sorghum grains shall be:  
a) clean, wholesome and uniform in size and shape;  
b) free from musty or other objectionable odour;  
c) practically free from live pests; and  
d) practically free from noxious or harmful seeds in amounts that could be harmful to human  health.  
4.4 Specific requirements  
Malted sorghum grains  shall comply with the specific requirements given in Table 1 when tested in accordance 
with test methods specified therein .  
Table 1 Specific requirements for Malted sorghum grains  
S/N Characteristic  Requirement  Test method  
i.  Moisture %, m/m, max.  13.5 RS ISO 24557  
ii.  Foreign matter, %m/m, max.  2.0 RS ISO 605  
iii.  Total ash ( on dry basis) , % m/m max.  4.0 RS ISO 2171  
iv.  Crude fiber, % m/m max.  2.5 RS ISO 5498  
v.  Carbohydrates  % m/m m in.   
vi.  Tannin content, % m/m, max.  0.5 ISO 9648  
5 Hygiene  
5.1 Malted sorghum grains shall be produced, prepared and handled in accordance with RS CAC /RCP 1  
5.2 Malted sorghum grains shall not exceed the microbiological limits in Table 2 when tested in accordance  
with test methods specified therein.  
Table 2 Microbiological limit s for Malted sorghum grains  
S/N Microorganism  Maximum limit  Test method  
i.  Salmonella spp , per 25 g  Absent  RS ISO 6579 -1 
ii.  Escherichia coli , cfu/g   Absent  RS ISO 16649 -2 
iii.  Yeast and moulds, cfu/g  104 RS ISO 21527 -2 
iv.  Staphylococcus aureus  per 25 g  Absent  RS ISO 6888 -1  
v.  Lactic acid bacteria , cfu/g  Absent  ISO 15214   
©RSB 2021  - All rights reserved                  4 
 6 Contaminants  
6.1 Pesticides residues  
Malted sorghum grains  shall comply with those maximum residue limits for pesticides established by the  Codex 
Alimentarius Commission.  
6.2 Heavy metals  
Malted s orghum grains shall comply with the limits for heavy metals specified in CODEX STAN 193.  
6.3  Mycotoxins  
Malted sorghum grains  shall not exceed aflatoxin limits in Table 3 when tested in accordance with test method 
specified therein .  
Table 3 — Aflatoxin limits for  Malted sorghum grains  
S/N  Type of aflatoxin  Maximum limit (μg/kg)  Test method  
i.  Total aflatoxin  10 EAS 901  
 ii.  Aflatoxin B 1 5 
iii.  Fumonisins  2 000  
7 Packaging  
Malted sorghum grains  shall be packed in new suitable bags made of paper, jute, polypropylene or any other 
suitable food grade packaging material capable of protecting quality and safety of the product. The mouth of 
each package shall be properly sealed.  
8 Labelling  
In addition to the requirements of RS EAS 38, the following specific labelling requirements shall be legibly and 
indelibly marked :  
a) name of product as “Malted sorghum grains ”; 
b) name and address of manufacturer;  
c) date of manufacture;  
d) date of expiry;  
e) instruction for use;  DRS 468:  2021  
5                ©RSB 2021  - All rights reserved  
 f) batch number;  
g) storage conditions;  and 
h) country of origin.  
9 Sampling  
Sampling of malted sorghum grains  shall be in accordance with RS ISO 24333.  
. 
 
 
 DRS 468 : 2021  
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