Useful Links
Chemistry
Analytical Chemistry
Fundamental Concepts
Qualitative Analysis
Identification of Chemical Compounds
Chemical tests for identification
Precipitation reactions
Colorimetric reactions
Flame tests
Spectroscopic identification methods
Infrared spectroscopy for functional group detection
Nuclear Magnetic Resonance for structural elucidation
Qualitative observations
Odor
Color change
Texture and state changes
Techniques for Compound Characterization
Chromatographic methods
Thin-layer chromatography (TLC) for compound spotting
Gas chromatography (GC) for volatile compound analysis
Spectrometric methods
Mass spectrometry for molecular weight determination
Ultraviolet-visible spectroscopy for electronic transitions
Crystallography
X-ray diffraction for crystalline structure analysis
Quantitative Analysis
Measurement of Concentration and Amounts
Gravimetric analysis for mass-based determination
Volumetric analysis (titration) for solution concentration
Instrumental methods
Spectroscopic quantification through absorbance
Electrometric analysis for ionic concentration
Methods of Quantification
Standardization techniques
Primary standards preparation
Calibration curve development
Analytical calculations
Stoichiometry in titration
Signal interpretation from detectors
Systematic Error and Random Error
Sources and Reduction of Errors
Instrumental errors from calibration and drift
Methodological errors from sample handling
Environmental errors due to temperature and humidity
Accuracy and Precision
Definition and distinction between accuracy and precision
Methods to improve accuracy (calibration and standard references)
Statistical methods to evaluate precision (standard deviation, variance)
Calibration
Calibration Methods
Single-point and multi-point calibration for instruments
Internal standards and reference materials
External calibration using known standards and plots
Importance in Accuracy and Reliability
Impact on measurement validity
Traceability to national or international standards
Recalibration intervals and maintenance plans
1. Introduction
First Page
3. Techniques and Methods