Q. Examples of other substances that might have been in a beverage sample are be
ID: 476819 • Letter: Q
Question
Q. Examples of other substances that might have been in a beverage sample are benzoic acid and phosphoric acid. In each case suggest if the substance would have been detected by your procedue (determination of caffeine by HPLC). In each case suggest if the substance would have shorter ot longer retention time than caffeine?
C: Datal1 1941Spring 2017 pepsi Group3 sec oo42017-01-25 19-57-10Group2.D pepsi Group3 sec 004. Data file: Sample name: Description: HPLC PCO2 Instrument Sample type: Sample 1/25/2017 7:59:28 PM Injection date: Acq. method: Location Caffeine 3.M Injection Analysis method Caffeine 3.M 1 of 1 injection volume: manually 9/2/2015 3:53:23 PM Last changed: Acq. operator: SYSTEM ww01 A. Wavelength 275 mm 320 300 280 260 240 220 180 E 160 140 120 100. 80 40 20 o 1 0.2 o 3 0.4 o 5 0.6 0.7 0.8 0.9 i 1.1 1.2 1.3 1.4 1 5 16 1.7 1.8 1 9 2 2.1 2.2 2.3 2.4 2 5 2 27 2 8 29 3 31 32 Time (min]Explanation / Answer
Yes HPLC method can be used to detect the presence of benzoic acid & phosphoric acid in beverages. Benzoic acid has a longer retention time than caffeine.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.