AFDC 04(1456 )DTZS  
                                                                                                               REV:TZS 1391:2011  
                                                                                                               
                                                                                                                 
  
 
 
 
 
 
       DRAFT  TANZANIA STANDARD  
 
                        Edible Mustard  seed oil – Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                   TANZANIA BUREAU OF STANDARDS  
 
    ©TBS 2022  – All rights reserved  
 
                                                                                                              
                                                                                                               AFDC 04(1456 )DTZS  
                                                                                                               REV:TZS 1391:2011  
                                                                                                               
                                                                                                                 
 Edible Mustard seed   oil – Specification  
 
0 Foreword  
 
Mustard oil comes from the seeds of mustard plants. It is rich in monounsaturated fatty acids, which 
appear to reduce the likelihood of developing cardiovascular disease . Edible mustard seed   oil is used 
in the food industry as a cooking oil . It is one of traded edible vegetable oil in Tanzania.  
 
This Tanzania Standard  has been prepared to ensure the safety and quality of edible mustard seed   
oil produced domestically , exported  or imported into the country.  
 
In preparation of this  Tanzania  standard considerable help was derived from : 
 
CODEX STAN 210 -1999 ( Revised  2019 ), Codex standard for named vegetable oil s published by the 
Codex Alimentarius Commission . 
 
In reporting the results of a test or analysis made in accordance with this Tanzania Sta ndard, 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 s tandard specifies  the requiremen ts, sampling  and testing methods  for mustard seed  oil 
derived from the seeds of whi te mustard ( Sinapis alba  L. or Brassica hirta Moench ), brown and yellow 
mustard ( Brassica juncea  (L.) Czernajew and Cossen) and of black mustard ( Brassica nigra  (L.) Koch) 
intended  for human consumption . 
 
2 Normative r eference s 
 
The following referenced do cuments 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 ; 
 
Codex s tan 192, General standar ds for food additives               
TZS 4 ,  Rounding off numerical values  
TZS 54 , Animal and Vegetable fats and oils – Sampling  
TZS 76 ,  Methods for determination of arsenic  
TZS 109, Food processing units – Code of hygiene — General  
TZS 268 , General atom ic absorption – Spectro – Photometric method for determination of lead in 
food stuffs  
TZS 538  , Packaging and labeling of foods  
TZS 799 , Foodstuffs – Determination of aflatoxin B 1, and the total content of aflatoxins B 1, B2, G1 and 
G2 in cereals, nuts an d derived products – Highperformance liquid chromatographic method  
TZS 1313 , Fortified edible oils and fats — Specification  
TZS 1322 , Oils and fats Sampling and test methods – Purity test  
 
TZS 1324 , Animal and vegetable fats and oils – Determination of per oxide value -Iodometric (visual) 
end point determination  
TZS 1325 ,  Animal and vegetable fats and oils - Determination of saponification value                                                                                                                
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 TZS 1326 ,  Animal and vegetable fats and oils – Determination of moisture and volatile matter  
TZS 1327 ,  Animal  and vegetable fats and oils – Determination of iodine value  
TZS 1328 ,  Essential oils – Determination of relative density at 20  °C – Reference method  
TZS 1329 ,  Animal and vegetable fats and oils – Determination of refractive index  
TZS 1330,  Animal an d vegetable fats and oils – Determination of lovibond colour  
 
TZS 1331 ,  Animal and vegetable fats and oils – Determination of acid value and acidity  
TZS 1332 ,  Animal and vegetable fats and oils – Determination of unsaponifiable matter -method using 
diethyl ether extraction  
TZS 1335 ,  Animal and vegetable fats and oils – Determination of copper, iron and nickel content -
graphite furnace atomic absorption  
TZS 1336 ,  Animal and vegetable fats and oils – Determination of insoluble impurities content  
TZS 342 1, Mustard seeds for oil extraction -Specification  
 
3 Term s and definitions  
 
For the purpose of this Tanzania Standard the definition s below shall apply;   
 
3.1 edible mustard seed  oil 
 
oil extracted  from the seeds of white mustard ( Sinapis alba L. or Brassi ca hirta Moench ), brown and 
yellow mustard ( Brassica juncea (L.) Czernajew and Cossen) and of black mustard ( Brassica nigra (L.) 
Koch)  intended for human consumption . 
 
3.2 virgin mustard seed  oil 
 
edible mustard seed  oil obtained, without altering the natu re of the oil, by mechanical procedures, for 
example, expelling or pressing, and the application of heat only. It may have been purified by washing 
with water, settling, filtering and centrifuging only.  
 
3.3 c old pressed  mustard seed  oil 
 
edible mustard s eed oil obtained, without altering the oil, by mechanical procedures only, e.g. 
expelling or pressing, without the application of heat. They may have been purified by washing with 
water, settling, filtering and centrifuging only.  
 
3.4 refined /non -virgin  mustard seed   oil 
 
edible mustard seed  oil obtained, by mechanical procedures and/or solvent extraction and subjected 
to refining processes.  
 
4. Requirements  
 
4.1 General requirements  
 
Edible mustard seed  oil shall ; 
a) be obtained from mustard seeds complying  with TZS 3421;  
b) be free from  foreign and  rancid odour and taste;  
c) be clear and free from adulterants,  sediment s, suspended or foreign matter and water  
                                                                                                               
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 4.2 Specific requirements  
Edible mustard seed  oil shall comply with  specific requirements  given in Table 1 when tested in 
accordance with the methods specified therein ; 
Table  1- Specific   require ments for edible mustard seed   oil 
S. No.  Parameter  
 Requirement  Test method  
i.  Relative density  (at 20˚ C/water 20 ˚ C) 0.910  - 0.921  TZS 1328  
  
ii.  Refractive index  at 40 o C  
 1.461 -1.469  TZS 1329  
 
iii.  Saponification value, mg KOH/g oil  168 -184 TZS 1325  
 
iv.  Iodine value  (g I 2/100g)  92 -125 TZS 1327  
v.  Unsaponifiable matter, g/kg, max.   15 TZS 1332  
vi.  Colour on the Lovibond scale,  expressed 
as (Y + 5R) not deeper than  Cold pressed and 
virgin oil:         502) 
 
Refined oil:     301) 
 TZS 1330  
vii.  Moisture and matter volatile at 105 o C, % 
m/m, max.  0.2 TZS 1326  
viii.  Insoluble impurities, % m/m, max.  0.05 TZS 1336  
ix.  Soap content, % m/m, max.  0.005  TZS 1322  
x.  Iron (Fe) mg/kg ,max.  Cold pressed and 
virgin oil:          5  
 
Refined  oil:     1.5  
 TZS 1335  
xi.  Copper (Cu) mg/kg ,max.   Cold pressed and 
virgin oil:         0.4  
 
Refined  oil:     0.1  
 TZS 1335  
xii.  Acid value, mg KOH/g Oil, max.  Refined  oil:    0.6  
 
Cold pressed and 
virgin oil:        4 
 TZS 1331  
xiii.  Peroxide value, mEq/kg, max  Refined  oil :10  
 
Cold pressed and 
virgin oil: 15  
 TZS 1324  
Note:  
1) in a 5 ¼ inch cell.                                                                                                                
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 2) in a ¼ inch cell.  
 
5  Food additives  
 
Refined mustard seed  oil may contain food additives in accordance  with Codex Stan 192. In addition , 
food additives shall not be used  in virgin or cold pressed mustard seed  oil.  
 
 
6.  Fortification  
 
Edible mustard seed   oil may be fortified in accordance with TZS 1313.  
 
7  Hygiene  
 
Edible mustard seed   oil shall be proc essed, handled and stored in accordance with TZS 109  . 
 
8  Contaminants  
 
8.1 Aflatoxin  
 
Aflatoxin level  for edible  mustard seed oil shall not exceed maximum limits as given in Table 2 when 
tested in accordance with test method specified therein:  
 
                         Table 2 - Aflatoxin limits for edible mustard seeds oil  
 
S/N Aflatoxin  Maximum limit (  µg/kg)  Method of test  
i) Total aflatoxin  10 TZS 799  
 ii) Aflatoxin B 1 5  
 
8.2 Pesticide residues  
Edible mustard seed  oil shall comply with relevant maximum pesticide residue limits established by the  
Codex Alimentarius Commission online data base.  
8.3 Heavy metal  contaminants  
Edible mustard seed  oil shall comply with the maximum  heavy metal limits as specified in Table 2 . 
Table 3– Maximum Limits for heavy metal contaminants in edible mustard seed   oil 
 
S/No  Contaminant  Maximum limit  Test Method  
i Lead (Pb) mg/kg  
 0.08 TZS 268  
ii Arsenic (As) mg/ kg  
 0.1 TZS 76  
 
9  Packing, Marking and Labelling  
 
Edible mustard seed  oil shall be packed, marked and label led in accordance with TZS 538.  
 
9.1  Pack ing 
                                                                                                               
                                                                                                               AFDC 04(1456 )DTZS  
                                                                                                               REV:TZS 1391:2011  
                                                                                                               
                                                                                                                 
 Mustard  seed  oil intended for human consumption shall be pack ed in containers made of food grade 
materials  and properly sealed to ensure safety and quality requirements of the product  are main tained 
throughout the shelf life . 
 
9.2    Marking and label ling 
 
9.2.1 In addition each c ontainer of  edible mustard seed   oil shall be legibly and indelibly marked with 
the following information:  
 
a) Name of the product  shall be " mustard seed   oil "; 
b) The words virgin or refined shall be declared on the label to indicate the type of oil  
c) Name, physical address of the manufacturer and/or packer;  
d) Batch or lot number;  
e) Date of manufacturer;  
f) Expiry date;  
g) Net weight in Metric unit;  
h) Country of origin;  
i) Storage conditions;  
j) List of ingredients in descending order, including the specific name of additives;  
 
9.2.2 The containers may  also  be marked with the TBS Standards Mark of Quality.  
 
NOTE – The TBS Standards Mark of Quality shall be used by the manufacturers only under licenc e from TBS. 
Particulars of conditions under which the licences are granted, may be obtained from TBS.  
 
10 Sampling and Tests  
 
10.1 Sampling  
 
Edible mustard seed  oil shall be sampled in accordance with  TZS 54.  
 
10.2 Tests  
 
Edible mustard seed   oil shall b e tested in accordance with the test methods given in this Tanzania 
standard  
 
 
 
 
 
 
 
 
                                                                                                               
                                                                                                               AFDC 04(1456 )DTZS  
                                                                                                               REV:TZS 1391:2011