G/TBT/N/UGA/1712  
7 December 2022  
(22-9080) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  UGANDA  
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:   
Uganda National Bureau of Standards  
Plot 2 -12 ByPass Link, Bweyogerere Industrial and Business Park  
P.O. Box 6329 Kampala, Uganda  
Tel: +(256) 4 1733 3250/1/2 Fax: +(256) 4 1428 6123  
E-mail: info@unbs.go.ug  
Website: https://www.unbs.go.ug  
Name and address (including telephone and fax numbers , email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:   
3. Notified under Article 2.9.2 [  ], 2.10.1 [  ], 5.6.2 [X], 5.7.1 [  ], 3.2 [  ], 7.2 [  ], 
other :  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  
Physicochemical methods of analysis (ICS code(s): 71.040.50)  
5. Title, number of pages and languag e(s) of the notified document:  DUS 2665: 
2022, Standard Test Method for pH of Aqueous Solutions with the Glass 
Electrode, First Edition ; (15 page(s), in English)  
6. Description of content:  This Draft Uganda Standard specifies the apparatus and 
procedures for the electrometric measurement of pH values of aqueous solutions with the 
glass electrode. It does not deal with the manner in which the solutions are prepared. pH 
measurements of good precision can be made in aqueous solutions containing high 
concentra tions of electrolytes or water -soluble organic compounds, or both. It should be 
understood, however, that pH measurements in such solutions are only a 
semiquantitative indication of hydrogen ion concentration or activity. The measured pH 
will yield an accu rate result for these quantities only when the composition of the medium 
matches approximately that of the standard reference solutions. In general, this test 
method will not give an accurate measure of hydrogen ion activity unless the pH lies 
between 2 an d 12 and the concentration of neither electrolytes nor nonelectrolytes 
exceeds 0.1 mol/L (M).  
7. Objective and rationale, including the nature of urgent problems where 
applicable:  Prevention of deceptive practices and consumer protection; Quality 
requirements  G/TBT/N/UGA/1712  
 
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  8. Relevant documents:   
1. ASTM D1193 -06, Standard Specification for Reagent Water  
2. ASTM D1293, Standard Test Methods for pH of Water  
3. ASTM D5128, Standard Test Method for On -Line pH Measurement of Water of Low 
Conductivity  
4. ASTM D5464, Standard Test Method for pH Measurement of Water of Low 
Conductivity  
5. ASTM D6569, Standard Test Method for On -Line Measurement of pH  
6. ASTM D6809, Standard Guide for Quality Control and Quality Assurance 
Procedures for Aromatic Hydrocarbons and Related Materials  
7. ASTM E29, Standard Practice for Using Significant Digits in Test Data to Determine 
Conformance with Specifications  
8. ASTM E180 -03, Standard Practice for Determining the Precision of ASTM Methods 
for Analysis and Testing of Industrial and Specialty Chemicals  
9. ASTM E1910/E1910M, Standard Test Method for Agricultural pH Control Agents, 
Measurement of pH Change and Buffering Capacity  
10. OSHA Regulations, 29 CFR  
9. Proposed date of adoption:  February 2023  
Proposed date of entry into force:  Not applicable  
10. Final date for comments:  60 days from notification  
11. Texts available from:  National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available , of other body:   
Uganda National Bureau of Standards  
Plot 2 -12 ByPass Link, Bweyogerere Industrial and Business Park  
P.O. Box 6329 Kampala, Uganda  
Tel: +(256) 4 1733 3250/1/2 Fax: +(256) 4 1428 6123  
E-mail: info@unbs.go.ug  
Website: https://www.unbs.go.ug