The generation of these ions is proportional to the concentration of organic species in the sample gas stream. FID measurements are usually reported as "as methane", meaning as the quantity of methane which would produce the same response. Hydrocarbons generally have molar response factors that are equal to the number of carbon atoms in their molecule, while oxygenates and other species that contain heteroatoms tend to have a lower response factor. Carbon monoxide and carbon dioxide are not detectable by FID. FID measurements are often labelled "total hydrocarbons"  or "total hydrocarbon content" THC , although a more accurate name would be "total volatile hydrocarbon content" TVHC ,  as hydrocarbons which have condensed out are not detected, even though they are important for e. Advantages and disadvantages[ edit ] Flame ionization detectors are used very widely in gas chromatography because of a number of advantages.
Responsfactoren in English with contextual examples
Placement Testing Understanding Placement Placement at NMC refers to the math and English courses that are the best fit for you to begin your academic plan. Placement is important because it determines where you start in your math and English coursework. Placing into more advanced courses can save you time and money by allowing you to skip over beginner courses. Of course, if you need a refresher on math or English skills, your placement will ensure that you do not start in a course that puts you in over your head. Prepare for your math placement using these free resources: Accuplacer Study App and Khan Academy.
40 CFR 1065.365 - Nonmethane cutter penetration fractions.
As detailed in this section, these penetration fractions may be determined as a combination of NMC penetration fractions and FID analyzer response factors, depending on your particular NMC and FID analyzer configuration. Perform this verification after installing the nonmethane cutter. Repeat this verification within days of testing to verify that the catalytic activity of the cutter has not deteriorated.
Test Proctoring This service provides flexible hours for faculty and students to access academic out-of-class testing, make up testing, and placement testing. Test proctoring is provided during the hours that the center is open. Students are strongly urged to complete their placement testing before attending new student orientation. Testing ahead of time ensures that students can re-test if they are not happy with their initial scores and can register for classes at orientation. We encourage students to prepare for the Accuplacer math exam by attending a math boot camp, practicing on the Accuplacer Study App , and using the pre-algebra and algebra modules of Khan Academy.