ffsshhttiikk What I do
- Identify and quantify chemical substances using instrumental and classical methods
- Perform chromatography, spectroscopy, and mass spectrometry analyses
- Validate analytical methods and ensure quality control compliance
- Interpret spectral data and chemical measurements
- Develop and optimize separation techniques
- Ensure laboratory safety and regulatory compliance
When to use me
- When analyzing chemical samples for composition and purity
- When developing or validating analytical methods
- When interpreting spectroscopic or chromatographic data
- When troubleshooting analytical instrumentation issues
- When ensuring compliance with analytical standards (ISO, ASTM, EPA)
Key Concepts
Common Analytical Techniques
Chromatography
- Gas Chromatography (GC): Volatile compound separation
- High-Performance Liquid Chromatography (HPLC): Non-volatile analysis
- Ion Chromatography: Ionic species detection
Spectroscopy
- UV-Vis Spectroscopy: Electronic transitions quantification
- Infrared (IR) Spectroscopy: Functional group identification
- Nuclear Magnetic Resonance (NMR): Molecular structure elucidation
- Mass Spectrometry (MS): Molecular weight and fragmentation analysis
Method Validation Parameters
# Example: Calculating method validation metrics
import numpy as np
def validate_method(known_concentrations, measured_values):
"""Validate analytical method performance."""
recovery = (np.mean(measured_values) / np.mean(known_concentrations)) * 100
rsd = (np.std(measured_values) / np.mean(measured_values)) * 100
correlation = np.corrcoef(known_concentrations, measured_values)[0, 1]
return {
'accuracy': recovery,
'precision': rsd,
'linearity': correlation ** 2
}
Quality Control
- Blank measurements: Background correction
- Standard additions: Matrix effect compensation
- Duplicate analyses: Precision monitoring
- Certified reference materials: Calibration verification