screening agent

screening agent

[′skrēn·iŋ ‚ā·jənt]
(analytical chemistry)
A nonchelating dye used to improve the colorimetric end point of a complexometric titration; a dye addition forms a complementary pair of colors with the metalized and unmetalized forms of the end-point indicator.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
If I check my luggage, I place the bells on top so they are immediately accessible to the screening agent. Since I will not be present to explain to the agent what the contents are about, I have a printed paper that is immediately visible upon opening the suitcase that states "Dear TSA Agent: I am on my way to an American Indian powwow.
It is comprised of water; glycerin; a provitamin of vitamin B5; allantoin; white tea extract; blueberry extract; acai extract; at least one UVA and/or UVB screening agent; stearyl alcohol; grape seed oil; borage oil; olive oil; jojoba oil; vitamin E acetate; salicylic acid; an amino acid or a form of an amino acid; an alpha arbutin; hydrolyzed rice bran protein, oxido reductases, and/or glycine soja (soybean) protein; sodium hyaluronate; aloe or an extract from aloe; lactic acid; a dermatologically-acceptable form of silicone; one or more polyacrylamide-based emulsifying agents; vitamin A palmitate; orange oil and lemongrass oil.
Meanwhile, Qantas, an authorized screening agent and issuer of security cards, rejected the TWU's accusations.
The windows are made from extra-thick glass to aid insulation and have a special screening agent within it to prevent energy loss.
Skywest said on Friday (8 July) it had no knowledge of charges it had allegedly incurred at regional airports in Western Australia where Qantas is the designated security screening agent.
Another issue is which NCCLS screening agent should be tested.
Why not open up the job of rating TV shows to any screening agent group - from the PTA to the Christian Coalition, from the National Rifle Association to the National Organization for Women - that wants to do it?
Individuals seeking year-round skin protection must look for a sunscreen with more than a high Sun Protection Factor (SPF); they must also check sunscreen ingredients for an effective UVA screening agent. Parsol [R] 1789 (avobenzone) absorbs the broadest range of UVA rays of any sunscreen ingredient currently available.
The effective deployment of the screening agent to achieve area coverage on a moving platform remains a difficult problem.
We have seen improvements in the way x-ray pictures are utilised to improve the imagery seen by the airport's screening agent.
Ceftazidime (30[micro]g) and Cefotaxime (30[micro]g) discs were used as a screening agents as per CLSI guideline.