The phrase "amounts are left on" is not correct in standard written English.
It may be intended to convey that certain amounts remain in a specific context, but it lacks clarity and completeness.
Example: "The amounts are left on the table for review."
Alternatives: "amounts remain on" or "amounts are still on".
After five hand-washing cycles, 30% of the initial copper amount was left on the cellulose fabrics.
Avoid using real face masks, because those are only meant to be left on for a short amount of time.
This is to oxidise the polyphenols in the tissue to a black colour, which is dependent upon oxygen and the small amounts of sodium hydroxide which are left on the olives.
Tickets are $30, and only a limited amount are left.
In dryland areas, a maximum amount of mulch is left on the surface; in more humid regions, however, some of the mulch is buried.
The main reason High Violet took two years is the sheer amount of sweat that was left on the sauna floor – whole instrumentals, painstakingly worked out and recorded, only to be ditched because Berninger didn't find them inspiring.
In addition to this, a large amount of green material is left on the soil, which if not burned, a practice which is prohibited or in the process thereof in many countries, impedes later work to the point where over 600 to 800 kg/ha affects establishment of rice in the following season.
It is assumed that a similar amount of cobalt precursor is left on CuO NWs after drying, in each case.
That means floating a cloud of reactive gas over the substrate (the object being coated) in such a way that just the right amount of film coating is left on it.
A very small amount of the chemical was left on the rock surface; the surface energy decreased and the solid surface was altered to preferential gas-wettability as a result of adsorption.
