spot test

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spot test

[′spät ‚test]
(analytical chemistry)
The addition of a drop of reagent to a drop or two of sample solution to obtain distinctive colors or precipitates; used in qualitative analysis.
References in periodicals archive ?
In addition, she argued that chemical tests taken at the hospital should be admitted to "undo" her refusal to take the Breathalyzer.
The textile testing laboratory is accredited to ISO 17025 by the National Accreditation Body of Indonesia, and the Consumer Product Safety Commission (CPSC), and can provide physical and chemical tests to determine if products meet international and national standards such as ISO, BS, DIN, AATCC, ASTM, CPSC etc.
Optical testing isn't designed to replace chemical tests of crosslinking, but to give early warning of a change in the process to permit prompt correction, since off-line chemical tests on cut samples may take days to yield results.
The reference is designed for use by law enforcement and forensic laboratories, guiding readers on the simplest ways if sampling suspect material for field testing and instructions on chemical tests of the most frequently seized controlled substances.
He remained confident that the remaining 200 metres (of a total 1,300m) of the pump would have been finished last night, and given that the lab complete all chemical tests on time, the water distribution will begin on Saturday.
Forensic expert Dr Philippe Charlier, of the Raymond Poincare Hospital, near Paris, used chemical tests to show the relics, which were discovered in 1867, contain materials used to embalm and wrap mummies in ancient Egypt.
Chemical tests however were negative for explosives, as was a second set of tests.
But veterans' advocates and some members of Congress note the government took more than a decade to notify World War II personnel they'd been exposed to chemical tests, and they're already skeptical of the pace this time around.
This combination of materials and chemical tests ensures a clean vial that is reliable for analytical sample handling.
All the major physical and chemical tests, as well as various standard practices, will be covered.
Chemical tests on the skeletons help to explain contemporary references to gladiators as 'barley crunchers'; high levels of strontium and low levels of zinc point to a diet of high vegetarian content.
This report presents the results of mechanical and chemical tests on 24 retrieved geosynthetics from 12 sites across the United States and provides a baseline databank of the mechanical and chemical properties of many commonly used geosynthetics in transportation applications as tested by industry It also provides a summary and synthesis of the results and methods from site retrievals and comments on the significance of laboratory index testing in developing durability design protocols.

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