free from impurities

See: clean
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The Ministry called upon farmers to improve the quality of their products and purify them perfectly to ensure that they are highly competitive, marketable and free from impurities.
Amber Palm claims it deals with 100 per cent natural amber which is free from impurities and sourced through "sustainable methods".
The equipment plays an important role in the chip fabrication process in ensuring that the silicon wafers are free from impurities.
Tenders are invited for Supply of White Cotton Waste Pure Doulble Teased Superfine Quality (Wcw-101) Dry & Free From Impurities & Foreign Material 100%Cotton, Packed In 50 Kgs Of Old Gunny Bags Gross Weight.
Hence, it is essential that the water you use is free from impurities such as organics, ions, particulates and bacteria that might otherwise be detrimental to your research.
All reports claiming that poor-quality water is supplied in Ajman are baseless, as the Fewa collects water samples and sends them for lab tests on a daily basis to ensure they are free from impurities," he said.
Shanghai-based Cactus Botanies has launched chondroitin sulfate that is free from impurities or adulteration and thoroughly tested for quality using four methodologies.
Keeping surfaces and furniture sanitised and free from impurities is also a must when maintaining a healthy home.
4,3) 19 Ring-shaped (7) 20 Move like a duck (6) 22 Velvet-skinned fruit (5) 23 Largest city in Australia (6) 25 Customary practice (5) 27 Free from impurities (5)
It is vital to the quality of the paper that this fabric be free from impurities, so extreme care must be taken when handling the rolls.
Some environments, such as schools, hospitals, long-term care facilities, and cleanrooms, demand indoor air that's free from impurities.
GTL technology is used to convert natural gas to products such as diesel fuels and kerosene that are free from impurities such as sulfur and nitrogen oxide.