Forensic Chemistry and Toxicology - Mock Test

A preliminary test which can determine between natural and synthetic fibers and other unique physical characteristics under a microscope.

• Fiber Analysis

• Microscopic Analysis

• Acid Phosphate Test

• Benzidine Test

This test determines prostate-specific antigen, confirming the presence of semen.

• PSA Test

• Acid Phosphate Test

• Florence Test

• Barberio’s Test

Flattened, twisted fibers with thickened edges. Dissolves in ammonia but insoluble in sodium chloride.

• Flax Fibers

• Hemp Fibers

• Cotton Fibers

• Jute Fibers

Apex tapers to a fine point. Transverse sections are polygonal and show small cavity. Gives a blue or bluish red color when treated with a weak solution of potassium chloride.

• Flax Fibers

• Cotton Fibers

• Hemp Fibers

• Wool Fibers

Shows transverse lines and consist of cellulose. Stains bluish-red with phloruglucin and yellow with both aniline sulfate and a weak solution of potassium iodine.

• Silk Fibers

• Flax Fibers

• Jute Fibers

• Hemp Fibers

Quite smooth without longitudinal or transverse markings. Stained red with aniline sulfate and also with iodine and sulfuric acid.

• Wool Fibers

• Hemp Fibers

• Jute Fibers

• Slk Fibers

Have an outer layer of flattened cells with imbricated margins. Stains yellow with iodine and sulfuric acid and also with picric acid but does not dissolve in sulfuric acid.

• Wool Fibers

• Jute Fibers

• Hemp Fibers

• Flax Fibers

When manufactured, it is structureless microscopically. Fiber stains brown with iodine and sulfuric acid and yellow with picric acid.

• Silk Fibers

• Jute Fibers

• Hemp Fibers

• Flax Fibers

Straight and tapering to a point. Does not dissolve in concentrated sulfuric acid. Bright red color when placed in 1% alcoholic solution then ammonium hydroxide.

• Silk Fiber

• Wool Fiber

• Linen Fiber

• Hemp Fiber

A confirmatory test which provides a chemical fingerprint of the fiber, identifying its material composition.

• Infrared Spectroscopy

• Microsospectroscopy

• Microscopic Analysis

• Microscopic Examination