What This Document Is
This document details a laboratory experiment for CHEM 3420, Instrumental Analysis, at Brooklyn College. It outlines a procedure for determining the concentration of lead(II) ions (Pb(II)) in an unknown solution using Anodic Stripping Voltammetry (ASV) combined with the standard addition method. The experiment utilizes a CH Instruments Electrochemical Analyzer and a three-electrode setup.
Why This Document Matters
This lab guide is essential for students enrolled in Instrumental Analysis who need to gain practical experience with ASV, a highly sensitive electrochemical technique. ASV is particularly valuable for analyzing trace metals in various samples. Understanding standard addition is crucial for accurate quantitative analysis in complex matrices. This experiment provides hands-on experience with instrument operation, data acquisition, and analysis within a controlled laboratory setting.
Common Limitations or Challenges
This document provides the experimental protocol and setup instructions, but it does not offer in-depth theoretical explanations of voltammetry or detailed troubleshooting guides for the instrument. Students are expected to have a foundational understanding of electrochemistry and data analysis techniques. It also assumes access to the specified instrumentation and chemicals.
What This Document Provides
The full document includes: a detailed description of the ASV technique; safety precautions regarding lead(II) toxicity; specific instrument setup parameters (potential windows, scan rates, quiet times); a step-by-step procedure for cell setup, degassing, and data acquisition; and instructions for saving and converting the recorded data. This preview does *not* include the raw data, data analysis instructions, or the results section of a completed experiment. It also does not include detailed explanations of the underlying electrochemical principles.
