A. Walker test
B. Greiss test
C. Marshall test
D. Harrison and Gillroy test
Choose the correct answer from the options given below:
GSR Organic Component Spot Tests Explained
The question asks to identify the spot tests used for the organic components of gunshot residue (GSR). Spot tests are rapid chemical tests used for preliminary identification.
Correct Spot Tests for Organic GSR Components
- Walker Test: Primarily detects nitrates, which are common components resulting from the combustion of organic propellants in ammunition.
- Greiss Test: Detects nitrites, another key indicator often present in GSR originating from the organic gunpowder.
- Marshall Test: Also used to detect nitrates in GSR, serving a similar purpose to the Walker test in identifying propellant residues.
Excluded Spot Test
- Harrison and Gillroy Test: This test is designed to detect inorganic components, specifically lead, which is a metal element, not an organic component.
Therefore, the spot tests suitable for identifying the organic components (or their direct combustion products like nitrates and nitrites) of gunshot residue are the Walker test, Greiss test, and Marshall test. This corresponds to options A, B, and C.
Important Questions from Analytical Chemistry
Select the correct statement from the following options.
XRD peaks are produced by ________ of a monochromatic beams of X-rays scattered at a specific angles from each set of lattice planes in a sample.
Which is true for SC-2 clean procedure for initial cleaning of wafer IC fabrication?
X-ray diffraction utilises electrons of energy range _______.
Ninhydrin is used as detecting agent for amino acid in chromatography because ___________.
