USE OF ULTRAVIOLET SPECTROSCOPY TO DETECT ADULTERATION OF TRAFFIC PAINT VEHICLES

BASED ON THE MATERIALS INVESTIGATED, AN ULTRAVIOLET SPECTROSCOPIC METHOD FOR DETECTING ADULTERATION OF TRAFFIC PAINT VEHICLES IN AMOUNTS AS LOW AS 2 TO 5 PER CENT BY WEIGHT OF THE VEHICLE SOLIDS IS REPORTED. THE METHOD IS APPLICABLE TO THE MONITORING OF PURCHASED LOTS OF TRAFFIC PAINT AFTER A REFERENCE SAMPLE HAS BEEN ROAD TESTED AND FOUND ACCEPTABLE FOR USE. THE PAINT PIGMENT IS REMOVED BY CENTRIFUGING, A SEPARATE DETERMINATION OF NON-VOLATILE SOLIDS IS MADE, AND THE ORIGINAL SOLVENTS ARE THEN REMOVED FROM A WEIGHED SAMPLE OF THE VEHICLE. USING A SPECTRAL GRADE OF CYCLOHEXANE AS A SOLVENT, SOLUTIONS OF THE VEHICLE SOLIDS ARE QUANTITATIVELY PREPARED AND THEIR ABSORBANCES ARE MEASURED IN A DOUBLE-BEAM RECORDING ULTRAVIOLET SPECTROPHOTOMETER. THE SPECTRAL CURVES AND CHARACTERISTICS OF BOTH THE REFERENCE AND PURCHASED PAINTS /VEHICLE SOLIDS/ ARE THEN COMPARED FOR UNIFORMITY OR EVIDENCE OF ADULTERATION. AN ALKYD RESIN WAS USED IN THE STUDY SINCE IT IS MOST REPRESENTATIVE OF TRAFFIC PAINT VEHICLES IN USE TODAY. PLOTS OF PERCENTAGE ADULTERANT /WOOD RESIN, HYDROCARBON RESIN, FISH OIL, AND TALL OIL/ VERSUS SPECTRAL ABSORBANCE AT 264 HANOMETERS /MILLIMICRONS/ SHOW THE EFFECT OF THE ADULTERANT. ABOUT 4 HR ARE REQUIRED FOR A SINGLE DETERMINATION. /AUTHOR/

• Supplemental Notes:
  • Vol 7, No 2, PP 65-72
• Authors:
  • Bean, L
  • Chaiken, B
• Publication Date: 1967-2

Media Info

• Serial:
  • Materials Research and Standards
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Centrifuges; Equipment; Hydrocarbons; Painting; Pigments; Quantitative analysis; Resins; Samples; Solvents; Standardization; Traffic paint; Ultraviolet spectroscopy; Weight; Wood
• Old TRIS Terms: Centrifuging; Painting equipment; Spectral lines
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216133
• Record Type: Publication
• Files: TRIS
• Created Date: May 1 1994 12:00AM