AFDC 1 9(1106 ) DTZS  
                               
 
DRAFT TANZANIA STANDARD  
 
                 Mustard Seed s for oil extraction  – Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS   
                                                                                                             AFDC 1 9(1106 ) DTZS  
 Mustard seeds for oil extraction – Specification  
 
0 Foreword  
 
Mustard s eeds are small round seeds of various mustard plants with colour ranging  from yellow ish-
white , reddish -brown  or black . They are used as  ingredients in many food  products . 
This Tanzania Standard is intended to guide farmers/traders in achieving quality of mustard seeds 
required for oil extraction in internal and external market s.  
In the preparation of this Standard assistance was drawn from:  
 
ISO 1237:1981  (reviewed 2018)  Mustard seed  – specification  published by International Organization 
for Standardizati on. 
 
In reporting the results of a test or analysis made in accordance with this Tanzania Standard, if the 
final value observed or calculated is to be rounded off, it shall be done in accordance with TZS 4.  
1 Scope  
 
This Tanzania Standard specifies requi rements , methods of sampling and test for white mustard 
(Sinapis alba  or Brassica hirta ), brown and yellow mustard ( Brassica juncea)  or black mustard 
(Brassica nigra ) intended for oil extraction . 
 
2 Normative  references  
 
The following documents are referr ed 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 amendmen ts) 
applies ;  
 
Codex Stan 193, General Standard for Contaminants and Toxins in Food and Feed  
 
TZS 4, Rounding off numerical values  
TZS 109, Food  processing units – Code of hygiene – General  
 
TZS 538, Packaging and labeling of foods  
TZS 742, O leaginous seed s – Sampling   
TZS 799 ,  Foodstuffs – Determination of aflatoxin B1, and the total content of aflatoxins  B1, B2, G1 
and G2 in cereals, nuts and derived products – High-performance liquid chromatographic method  
TZS 1314  – 1, Oilseeds  – Determination of conte nt of impurities  
TZS 1314  – 2, Oilseeds  – Determination of moisture and volatile matter content  
TZS 1314  – 3, Oilseeds – Determination of oil content (Reference method)  
TZS 1314  – 4, Oilseeds  – Determ ination of acidity of oils  
3 Terms and d efinitions   
 
For the purposes of this Tanzania Standard, the following terms and definitions  shall apply:  
  
3.1 mustard seeds  
seeds obtained from the white mustard ( Sinapis alba  or Brassica hirta ), brown and yellow mustard 
(Brassica juncea)  or black mustard ( Brassica nigr a) plants.   
                                                                                                             AFDC 1 9(1106 ) DTZS  
 3.2 foreign matter  
organic and inorganic matter and anything else other than mustard seed, and includes loose and 
empty shells (hulls, husks).  
3.3 immature or shriveled seed s 
mustard seed that has indications of lack of maturity or full developm ent.  
 
3.4 damaged seeds  
seeds that are damaged mechanically, or by mould or insects , or those showing internal discoloration 
of seeds materially affecting th eir quality . 
 
4. Requirements  
 
4.1 General requirements  
 
4.1.1  The mustard seeds shall be dry and reasonably uniform in size.  
 
4.1.2 The mustard seeds shall be free from any other edible  or non-edible seeds.  
 
4.1.3  The mustard seeds shall be free from rancidity and foreign odours.  
 
4.1.4  Mustard seeds shall be free from living and dead insects, mould,  mites, insect fragments, 
excrement and rodent contamination visible to the naked eye.  
 
4.2 Specific requirements  
Mustard seeds  for oil extraction  shall comply with specific requirements specified in Table 1.                                       
                        
Table 1- Grading requirements for mustard seeds  for oil extraction  
 
S/NO  Characteristics                            Requirements  Methods of test  
  Grade 1  Grade 2  Grade 3  
i.  Oil content on moisture 
free basis% (m/m), min.  35 31 30 TZS 1314 -3 
 
ii.  Acid value of extracted oil, 
max. 1.5 2.5 6 TZS 1314 -4 
 
iii.  Foreign matter% ( 
m/m),max  0.7 1.0 1.5 TZS 1314 -1 
iv.  Immature/shrive led and 
damaged seeds % ( m/m),  
max. 1.0 2.0 4.0 TZS 1314 -1 
v.  Moisture conten t and 
volatile matter% ( m/m), 
max. 10 10 10 TZS 13 14-2 
 
5. Contaminants  
 
5.1 Metal contaminats  
Mustard seed  for oil extraction shall comply with those maximum metal contaminants st ipulated in 
CODEX STAN 193. 
 
5.2 Pesticide residues  
Mustard seed  for oil extraction shall comply with those maximum residue l imits established by th e  
                                                                                                             AFDC 1 9(1106 ) DTZS  
 Codex Alimentarius Commission.  
 
5.3 Mycotoxin  
 
Mustard seed for oil extraction shall conform to those maximum mycotoxin limits established by the 
Codex alimentarius Commission.  
 
5.3.1 Aflatoxin  
 
In particular aflatoxin level for mustard seed  for oil extraction shall not exceed maximum limits as given 
in Table 2 when tested in accordance with test method specified therein:  
 
                         Table 2 - Aflatoxin  limits for mustard seeds for oil extraction  
S/N Aflatoxin  Maximum  limit ( µg/kg ) Method of test  
i) Total aflatoxin  10  TZS 799  
 ii) Aflatoxin B1  5  
 
6 Hygiene  
Mustard seed s for oil extraction shall be grown in accordance with Good Agricultural Practices, 
handled and stored in accordance with TZS 109.  
 
7 Sampling an d methods of test ing 
7.1 Sampling  
 
Sampling of mustard seed s for oil extraction  shall be done in accordance with TZS 742.  
 
7.2 Methods of test ing  
 
Mustard seed s for oil extraction shall be tested in accordance with the methods specified in this 
standard.  
 
8 Packing, Marking a nd Labeling  
8.1 Packing   
 
Mustard seed s for oil extraction shall be packed in suitable food grade packaging materials which 
ensure that the saf ety and quality requirements specified in this standard are maintained throughout 
the shelf  life of the product.  
 
8.2 Marking and labeling  
 
8.2.1 The product shall be marked and labeled in accordance with TZS 538 . In addition each 
container/packet of product shall be legibly and indelibly marked with the following information :  
 
a) Name of the prod uct as ‘Mustard seed ” 
b) Grade  
c) Trade name or brand, if any;  
d) Name, address of the producer  and/or packer;  
e) Batch  or lot number;  
f) Date of packing;  
g) Net weight  in metric unit ; 
h) Country of origin;   
                                                                                                             AFDC 1 9(1106 ) DTZS  
 i) Storage condition s  
j) Year of harvest ; 
 
8.2.2  Language on the label sh all be in Kiswahili or Kiswahili and English. Any additional  language 
may be used depe nding on the designated market  
8.2.3  The containers shall also be marked with TBS Standards Mark of Quality.  
NOTE - The TBS Standards Mark of Quality shall be used by t he manufacture rs only under license from TBS.  
9 Storage and Transportation  
9.1 Storage  
Mustard seeds for oil extraction shall be stored in a dry and well ventilated environment and stacked 
on pallets to avoid moisture ingress. They shall be stored in lea k-proof warehouses. Warehouses shall 
be free from pests.    
9.2 Transportation  
Mustard seeds for oil extraction shall be transported in well secured wagons/containers/trucks to avoid 
contamination, loss and spoilage .