Desorption - Study guides, Study notes & Summaries

Which of the following ionization techniques is preferred for trace elements? a. matrix assisted laser desorption b. inductively coupled plasma c. electrospray d. chemical - ANSWER-b. inductively coupled plasma (mass spec) *trace element & heavy metal analysis Which of the following factors may cause an albumin result to fail a delta check flag when using the bromocresol green method? a. patient was recumbent during venipuncture b. specimen was collected in Li heparin c. specimen was ...

CMMB 461 FINAL Question and answers 100% correct CMMB 461 FINAL Basic components of mass spec - correct answer 1. Ion source 2. mass analyzer 3. detector Two main types of ionization - correct answer 1. Electrospray ionization 2. MALDI Electrospray Ionization (ES) - correct answer Peptide solution is passed through a narrow metal needle with a high electrical potential resulting in highly charged droplets of protonated peptide ions. Matrix-assisted laser desorption ionization...

Chem 420 Exam Questions And Answers (Verified And Updated) Three types of electrical domains? - answerAnalog Signals - magnitude of voltage, current, charge, or power; continuous in both amplitude and time Time-domain Signals - time relationship of signal fluctuations; frequency, pulse width, phase Digital Info - Data encoded in discrete levels; great accuracy and precision Where does noise come from? (2 types) - answerChemical noise: temperature, pressure, humidity, fumes, etc Instrumen...

Most common STD - CORRECT ANSWER Chlamydia (1.7 mil cases) Skin normal biota is coagulase-negative staph, cornybacterium, and microbacterium smegmatis - CORRECT ANSWER males (all ages) Skin normal biota staph and corynbacterium - CORRECT ANSWER females (prepuberty and post-menopause) Normal biota of the skin for reproductive-age females in some cases- they carry it asymptomatically - CORRECT ANSWER GBS Normal biota of the skin for ___________ includes Enterobacteriace...

SOLID STATE ASTROPHYSICS AND-CHEMISTRY FOUR QUESTIONS- FOUR ANSWERS H. Linnartz, K. Acharyya, Z. Awad, S.E. Bisschop, S. Bottinelli, J. Bouwman, H.M. Cuppen, G.W. Fuchs, S. Ioppolo, K.I. ¨ Oberg and E.F. van Dishoeck1 Abstract. Recent progress in ultra high vacuum surface experiments allows detailed investigations of the physical and chemical parameters governing astro nomically relevant solid state processes on icy dust grains. In this proceeding four questions are shortly addre...

How to calculate signal to noise - Answer-S/N = mean/STDEV -inverse of RSD -STDEV: 5 (#STDEV gaussian curve) -STDEV: peak-to-peak noise/5 S/N relationships - Answer--increase S/N, increase run time -decrease noise, increase S/N Beer's Law - AnswerBeer's Law Calculations - AnswerHard ionization vs soft ionization - Answer--hard: no M+ peak (or small) -soft: M+ peak is visible MS: hard ionization sources - Answer--impart high quantities of residual energy in the subject molecule invokin...

MMSC 438 EXAM 2 SET Q&A Most common STD - ANSWER Chlamydia (1.7 mil cases) Skin normal biota is coagulase-negative staph, cornybacterium, and microbacterium smegmatis - ANSWER males (all ages) Skin normal biota staph and corynbacterium - ANSWER females (prepuberty and post-menopause) Normal biota of the skin for reproductive-age females in some cases- they carry it asymptomatically - ANSWER GBS Normal biota of the skin for ___________ includes Enterobacteriaceae and anerobes, st...

Instrumental Analysis ACS Exam Questions With 100% Correct Answers How to calculate signal to noise - answerS/N = mean/STDEV -inverse of RSD -STDEV: 5 (#STDEV gaussian curve) -STDEV: peak-to-peak noise/5 S/N relationships - answer-increase S/N, increase run time -decrease noise, increase S/N Beer's Law - answer Beer's Law Calculations - answer Hard ionization vs soft ionization - answer-hard: no M+ peak (or small) -soft: M+ peak is visible MS: hard ionization sources - answer-i...

Instrumental Analysis ACS Exam Questions With 100% Correct Answers How to calculate signal to noise - answerS/N = mean/STDEV -inverse of RSD -STDEV: 5 (#STDEV gaussian curve) -STDEV: peak-to-peak noise/5 S/N relationships - answer-increase S/N, increase run time -decrease noise, increase S/N Beer's Law - answer Beer's Law Calculations - answer Hard ionization vs soft ionization - answer-hard: no M+ peak (or small) -soft: M+ peak is visible MS: hard ionization sources - answer-impar...

Instrumental Analysis ACS Exam Questions With 100% Correct Answers How to calculate signal to noise - answerS/N = mean/STDEV -inverse of RSD -STDEV: 5 (#STDEV gaussian curve) -STDEV: peak-to-peak noise/5 S/N relationships - answer-increase S/N, increase run time -decrease noise, increase S/N Beer's Law - answer Beer's Law Calculations - answer Hard ionization vs soft ionization - answer-hard: no M+ peak (or small) -soft: M+ peak is visible MS: hard ionization sources - answer-impar...