DRAFT UGANDA STANDARD  
  DUS 1801  
First  Edition  
2017 -mm-dd 
 
 
 Reference number  
DUS 1801 :2017 
© UNBS 2017   
  
Dried Fish Maws — Specification   
 DUS 1801 : 2017  
ii © UNBS 2017  – All rights 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 applica tion 
© UNBS 2017   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
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 1801 :2017  
© UNBS 2017  – All rights reserved  iii 
 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 standards 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, a cademia, consumer groups, private 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 recommend ing the draft standards 
for approval 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 10, Fish and Fishery products.  
 DRAFT UGANDA STANDARD  DUS 1801: 2017  
 
© UNBS 2017  – All rights reserved  1 
 Dried Fish  Maws — Specification  
1 Scope   
This Draft Uganda  Standard specifies the requirements and methods of sampling and test for dried fish maws 
processed from the air bladder of fishes.  
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 references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments ) applies.  
US EAS  12, Potable water — Specification   
US CAC 52, Code of Practice for Fish and Fishery Products  
US ISO 6496 , Animal feeding stuffs — Determination of moisture and other volatile matter content   
US ISO 5985, Animal feeding stuffs — Determinat ion of ash insoluble in hydrochloric acid  
US ISO 5984 : Animal feeding stuffs — Determination of crude ash   
US ISO 6579 , Microbiology of food and animal feeding stuffs — Horizontal method for the detection of 
Salmonella spp  
US ISO 7251 , Microbiology of fo od and animal feeding stuffs — Horizontal method for the detection and 
enumeration of presumptive Escherichia coli — Most probable number technique   
US ISO 6888 -1, Microbiology of food and animal feeding stuffs — Horizontal method for the enumeration of 
coagulase -positive staphylococci (Staphylococcus aureus and other species) — Part 1: Technique using 
Baird -Parker agar medium   
US ISO 4833 -1: Microbiology of the food chain – Horizontal method for the enumeration of microorganisms – 
Part 1: Colony count at 3 0 C by the pour plate technique   
US ISO 7937 : Microbiology of food and animal feeding stuffs — Horizontal method for the enumeration of 
Clostridium perfringens — Colony -count technique   
US ISO 6888 - 1: Microbiology of food and animal feeding stuffs — Horiz ontal method for the enumeration of 
coagulase -positive staphylococci (Staphylococcus aureus and other species) — Part 1: Technique using 
Baird -Parker agar medium   
ISO 11290 -2: Microbiology  of food and animal feeding stuffs — Horizontal method for the detec tion and 
enumeration of Listeria monocytogenes -- Part 2: Enumeration method   
US ISO 21527 -1 Microbiology of food and animal feeding stuffs — Horizontal method for the enumeration of 
yeasts and moulds — Part 1, Colony count technique in products with water  activity greater than 0.95    
2 © UNBS 2017  – All rights reserved  
 DUS ISO 27085: Animal feeding stuffs -- Determination of calcium, sodium, phosphorus, magnesium, 
potassium, iron, zinc, copper, manganese, cobalt, molybdenum, arsenic, lead and cadmium by ICP -AES 
AOAC 990.04 : Mercury in fish by  Flame Atomic Absorption Spectroscopy (FAA)  
US ISO 16050 : Food stuffs ─ Determination of aflatoxins B1 and total content of aflatoxins B1, B2, G1 and G2 
in cereals, nuts, and derived products ─ High performance liquid chromatographic method   
US 45 : General  standard for food additives   
US 1659 : Materials  in contact with food — Requirements for packaging materials   
US EAS 803 : Nutrition labelling — Requirements   
US EAS 804: Claims  on food — Requirements   
US CAC/GL 50 : General guidelines on sampling   
US CAC/RC P 52: Code of practice for fish and fishery products   
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply . 
3.1 dried fish maws  
dried swim bladders of large fishes like Nile perch  
ISO and IEC maintain termin ological databases for use in standardization at the following addresses: — ISO 
Online browsing platform: available at http://www.iso.org/obp  
4 Requirements  
4.1 General Requirements  
4.1.1  Fish maws shall be prepared from sound swim  bladders of the designa ted fish species, which is of an 
acceptable quality and fit  for human consumption.  
4.1.2  Swim bladders shall be extracted fro mature fish which is complying to the fishing rules and 
regulations  
4.1.3 Water used for washing the fish  maws  shall comply with US EAS 12.  
4.1.4 After washing, the fish  maws  shall be dried either in the sun or in artificial dryers until the required 
moisture content is  obtained.  
4.1.5 The fish  maws , while drying, shall be protected against contamination from dirt, sand, and insec ts.  
4.1.5 The dried fish maws shall have  the characteristic colour and  odour  
4.1.7 Dried fish maws shall be free from any indication of spoilage such as mouldiness, colour change.  
4.1.8 The product shall be wholesome and  free from  stains, blood vessels, shreds, blood spots and any 
other form of foreign matter.  DUS 1801 : 2017  
© UNBS 2017  – All rights reserved  3 
 4.2 Specific requirements  
Dried fish maws shall comply with the requirements given in table 1  
Table 1 specific requirements for dried fish maws  
Parameter  Limits  Test Methods  
Moisture % Max  8.0 ISO 6496  
Acid insoluble ash, % max  1.5 ISO 5985  
Total ash, % max  15 ISO 5984  
5 Hygiene 
5.1 Dried fish maws shall be prepared and handled in accordance with , US CAC/RCP 52  and shall comply 
with microbiological limits given in table 2  
Table 2 — Microbi ological limits for dried fish maws  
Type of microorganism  Maximum limit  Method of test  
Salmonella  in 25 g  Absent  ISO 6579  
E. coli  per g  Absent  ISO 7251  
Staphylococcus aureus  CFU per g   103  ISO 6888 - 1 
Total viable count  105/g  ISO 4833  
Clostridium perfrigens  species  Absent  ISO 7937  
Yeast and Moulds  104  ISO 21527 -1  
6 Contaminant limits  
6.1 Dried fish maws shall comply with the contaminant limits given in Table 3.  
Table 3 — Contaminant limits for dried fish maws  
Type of contaminant  Maximum limit (mg/kg)  Method of test  
Arsenic  0.1 US ISO 27085  
Lead  0.3 US ISO 27085  
Cadmium  0.3 US ISO 27085  
Mercury  0.5 AOAC 990.04  
 
6.2 The dried fish maws shall contain no more than 10 microgram per kilogram total aflatoxin of which not 
more th an 5 microgram per kilogram may be aflatoxin B1 when tested in accordance with US ISO 16050  
7 Pesticide residues  
Dried fish maws shall comply with those maximum pesticides residue limits established by the Codex 
Alimentarius Commission .”  
4 © UNBS 2017  – All rights reserved  
 8 Food additives  
Additives used in processing of dried fish maws shall in accordance with US 45  
9 Weight and measures  
The fill and the weight of the product shall comply with Weight and Measures regulations of Uganda.  
10 Packaging  
Dried fish maws shall be packaged in accordance. With US 1659.  
11 Labelling  
11.1 In addition to the requirements in US EAS 38, the following specific labelling requirements shall apply 
and shall be legibly and indelibly marked:  
a) Name of the product ; 
b) Name and physical address of process or/pack er.  
c) Net weight in grams or kilograms.  
d) Date of packaging.  
e)  Batch or code number.  
f)  Expiry date.  
g) Storage conditions.  
h) Country of origin  
11.2 Nutritional labelling, nutrition and health claims shall be made in accordance with US EAS 803, US EAS 
804  
12 Sampling  
Sampling shall be done be carried out in accordance to US CAC/GL 50  
 US 1801 : 2017  
© UNBS 2017  – All rights reserved  5 
 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 u se of the UNBS Certification 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 Uganda 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 scheme 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, Ugand a 
National Bureau of Standards.  
 
 DUS 1801: 2017    
 
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© UNBS 2017– All rights reserved