• 17 Pages final-2013-v2
    Final-2013-v2

    School: UC Riverside

    Course: Instrumental Methods

    a. (10 pts) What is gas 1? Justify your answer. N2. Analytes have lower diffusion coefficient in N2, which makes the curve have lower H at u opt, due to a smaller B term in van deemter equation that is proportional to D; but a steeper curve with u > u opt

  • 8 Pages Solutions to In-Class Practice Problems-1
    Solutions To In-Class Practice Problems-1

    School: UC Riverside

    Course: Instrumental Methods

    Solutions to In-Class Practice Problems Signal and Noise After coadding 9 infrared spectra, a chemist got the signal (S) for the C=O vibrational band 1.20, and the rms noise (N) 0.004. a. b. What is the signal-to-noise ratio for this measurement? How many

  • 2 Pages quiz 2 (1)
    Quiz 2 (1)

    School: UC Riverside

    Course: Instrumental Methods

    Chem125, 2013Quiz 2 (take home, due Monday, Oct. 14th, 2013, in Lecture) Name: Lab section: 1. What radiationless transition would lead to fluorescence (F) and phosphorescence (P) after absorption of photons? Which (F vs. P) one would be emitted at longer

  • 6 Pages exam II
    Exam II

    School: UC Riverside

    Course: Instrumental Methods

    Name: Lab Section Name: Exam II, Chem125 2013 Lab section: 1. Define the following terms. a) Isobaric Interference in Inductively coupled plasma (ICP)-Mass Spectrometry. (9 pts) Interference by ions with the same mass-to-charge ratio as the analyte ions b

  • 8 Pages Midterm I-2013
    Midterm I-2013

    School: UC Riverside

    Course: Instrumental Methods

    Name: 1. Lab Section Exam I, Chem125 2013 What do the following abbreviations stand for? How are they determined or how do they work? For what purpose are they used in analytical chemistry? (30 pts) a. LOD Limit of detection. Determine the lowest amount o

  • 2 Pages quiz 3 (1)
    Quiz 3 (1)

    School: UC Riverside

    Course: Instrumental Methods

    Chem125, 2013 Quiz 3 Name: Lab section: Explain why laser possesses the following properties from the operation mechanism of laser. a. High power b. Monochromatic c. Collimated beam d. Coherent e. Polarized External energy is pumped into the laser, excite

  • 1 Page quiz 4 (1)
    Quiz 4 (1)

    School: UC Riverside

    Course: Instrumental Methods

    Chem125, 2013 Quiz 4 Name: Lab section: What are the advantages of the first device compared to the second one in the following pairs? 1. an FTIR spectrometer vs. a dispersive instrument, such as a monochromator; Advantages of FT-IR measurements Improved

  • 2 Pages quiz 1 (2)
    Quiz 1 (2)

    School: UC Riverside

    Course: Instrumental Methods

    Chem125, 2013 Quiz 1 Name: Grading policy for quizzes: maximum is expressed as 100% (the final grade for all quizzes will be the average of all counted quiz percentage scores divided by the total number of counted quizzes). For example, if there are a tot

  • 2 Pages quiz 5 (1)
    Quiz 5 (1)

    School: UC Riverside

    Course: Instrumental Methods

    Chem125, 2013 Quiz 5 Name: Lab section: 1. Compare electron impact ionization and chemical ionization. (60) EI CI Extent (15) Hard (5); Large scale fragmentation, so low molecular ion peak in spectrum (10) Soft; lower degree of fragmentation, high molecul

  • 4 Pages 125 syllabus Fall 2013(1)
    125 Syllabus Fall 2013(1)

    School: UC Riverside

    Course: Instrumental Methods

    CHEM 125 Instrumental Methods Fall 2013 Lecture Professor Wenwan Zhong CS 334, 827-4925 Wenwan.zhong@ucr.edu Class Meeting: Laboratory Professor Huiwang Ai CS 340, 827-3710 Huiwang.ai@ucr.edu MWF 10:10 AM 11:00 AM, SPR (Sproul Hall) 1340 Note: All labs st

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