Blog

Which documentation items must appear with each submitted spectrum?

If residue remains on the ATR crystal, best practice is to clean, re-background, and potentially re-run the sample.

Which steps reduce systematic error in this lab? (Select all that apply)

Which are appropriate ways to improve confidence when results are near LOQ? (Select all that apply)

A CCV is best described as:

If you dilute 10.00 mL digest to 100.00 mL, the DF is:

You prepared the run solution by diluting [A] mL digest to 100.00 mL. DF and Crun= [Cr] mg/L, recompute Cdig. (Report answer to 3 decimal places)

Select ALL regions helpful for discriminating similar fiber spectra when 1700-1200 cm^-1 looks similar.

The reaction between water and HNO3 (Nitric Acid) is ________, meaning it releases energy (heat).

Polypropylene typically shows strong C=O stretching near 1700 cm⁻¹.