The phrase "a quantity of the surplus" is correct and usable in written English.
It can be used when discussing the amount or volume of surplus resources or goods available in a particular context.
Example: "The company decided to donate a quantity of the surplus food to local shelters to help those in need."
Alternatives: "an amount of the surplus" or "a portion of the surplus".
In a literal sense, he got his wish: although the progressive-rock boom was effectively over by the end of the seventies, it left behind a vast quantity of surplus LPs, which filled the bins in used-record stores for decades.
A spokeswoman for St Mungo's said she was not sure whether it could accept a large quantity of surplus KFC chicken.
The quantity of surplus food clearly outnumbers the number of hungry people.
His fortune is up this year, thanks to an oil surplus; he is investing part of the surplus in tourism.
From comparisons of the amount of PP-V that was secreted with quantity of surplus intracellular ammonium, it is suggested that P. purpurogenum maintains ammonium homeostasis by excreting waste ammonium as PP-V.
Electrochemical plants could make use of the surplus electricity by applying a variable current density.
The factory has begun making a brand new engine design for use in small cars, but it will only be built in relatively limited quantities, leaving a large amount of surplus capacity.
Amassing vast quantities of "surplus" capital, the giant banks found they could garner superprofits on investments in colonies and semi-colonies, and this intensified the race for empire among the great powers.
She was due to sail at 2 15 A.M. Continued delay in channeling large quantities of Government surplus office equipment to the shelves of established dealers is threatening to disrupt seriously the industry's own veterans' training program, it was learned last week.
The government is studying a plan to transfer quantities of water from surplus rivers to deficit areas.
