The National Concentration Ratio

question 286

Multiple Choice

The national concentration ratio

• A) underestimates concentration for both the newspaper and the automobile industries.
• B) overestimates concentration for both the newspaper and the automobile industries.
• C) underestimates concentration for the newspaper industry and overestimates it for the automobile industry.
• D) overestimates concentration for the newspaper industry and underestimates it for the automobile industry.

---

Definitions:

Proton Spin Decoupled

A nuclear magnetic resonance (NMR) technique where the interaction between proton spins is removed or reduced, enhancing spectral resolution.

0-50 Ppm

A concentration range indicating 0 to 50 parts per million, often used to describe the presence of a substance within another substance.

Proton Spin Decoupled

A nuclear magnetic resonance (NMR) technique used to simplify the spectrum and analyze the structure by decoupling the interactions between proton spins.

Proton Spin Decoupled

A nuclear magnetic resonance (NMR) technique used to simplify spectra by removing interaction between proton spins.