Photoionization Detectors (PIDs) are the easiest and most efficient way to detect VOC levels. Although not as selective without the use of a gas chromatography column, a stand alone PID provides real time measurement of total volatile organic compounds in a portable format that anyone can use.
Ethnic: natural community of men with racial, linguistic, religious or cultural affinities. Understand that Native Americans is not a race but an ethnicity. The race of the native Americans of all the American Continent is Mongoloid.The paleoanthropological and genetic evidence demonstrates that approximately 14,500 years ago the Mongoloids crossed the Bering Stretch.re you referring to American Indians or Indians from India, In either case there is your answer Historically, India Indians are of the Caucasoid race, while Native Americans â¦ are of the Mongoloid race. Of course today, there is no biological basis for race. 3 people found this useful.
Native American identity in the United States is an evolving topic based on the struggle to define  Native American  or (American) Indian both for people who consider themselves Native American and for people who do not. common source of definition for an individual's being Indian is based on their blood (ancestry) quantum (often one-fourth) or documented Indian heritage. Almost two-thirds of all Indian federally recognized Indian tribes in the United States require a certain blood quantum for membership.