Lab Quiz Questions Flashcards
1
Q
Chemical exposure to the eyes: what do you do
A
Flush your eyes with water for at least 20 min
2
Q
Define the term “Proximate Analysis”
A
The quantitative analysis of macromolecules in food including, crude protein, crude fat, ash, moisture and carbohydrate
3
Q
During the ashing process there is a of black carbonaceous material; how do you solve the problem
A
Add a few drops of conc. acid (enough to wet the ash)
4
Q
Dry ashing does not preserve elements such
A
Sulfur, Chlorine, Fluorine, and Bromine for later quantitation
5
Q
What is the purpose of the 5% HCl in the preparation of ash for mineral analysis
A
To dissolve the ash
6
Q
What salt is used for preparing stock standard in phosphorous analysis
A
Potassium phosphate
7
Q
What wavelength will phosphorus absorbance be measured
A
660 nm
