Patent ID: 7098034

Claim:
An automated method of analyzing at least one amine-based or acid-based anti-stripping agent in a sample comprising asphalt binder material, comprising: providing the sample comprising the asphalt binder material with the at least one amine-based or acid-based anti-stripping agent; heating and/or preheating the sample to a sufficient temperature for a sufficient time to generate an exhaust vapor; capturing the exhaust vapor emitted from the sample; exposing a pH sensor to the captured exhaust vapor; automatically detecting color of the pH sensor exposed to the captured exhaust vapor; automatically comparing the detected color with reference calibration data of colors versus levels of anti-stripping agent associated with known reference samples; and automatically determining the presence and/or level of the at least one amine-based or acid-based anti-stripping agent in the sample based on the detected color of the pH-sensor and the reference calibration data.