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. 2021 May 17;10(5):1001. doi: 10.3390/plants10051001

Table 2.

ISO Chemical Requirements for dried oregano [11].

Characteristic Specification Test Method
Whole or Cut Leaves Ground (Powdered)
Processed Semi-Processed
Moisture content % (by mass) maximum 12 12 12 ISO 939
Total ash % (by mass) on dry basis, maximum 10 12 12 ISO 928
Acid-insoluble ash % (in mass) on dry basis, maximum 2 2 2 ISO 930
Volatile oil content, mL/100 g on dry basis, minimum 1,8 1,5 1,5 ISO 6571