Testing residual solvents involves various analytical techniques:
Methods:
1. Gas Chromatography (GC)
2. Headspace Gas Chromatography (HS-GC)
3. Liquid Chromatography-Mass Spectrometry (LC-MS)
4. Gas Chromatography-Mass Spectrometry (GC-MS)
5. Static Headspace Analysis (SHA)
Sampling Techniques:
1. Direct Injection
2. Headspace Sampling
3. Solid-Phase Microextraction (SPME)
4. Liquid-Liquid Extraction (LLE)
5. Solid-Phase Extraction (SPE)
Testing Protocols:
1. USP <467> “Residual Solvents”
2. Ph. Eur. 2.4.24 “Residual Solvents”
3. ICH Q3C (R6) “Impurities: Guideline for Residual Solvents”
4. FDA Guidance for Industry: Q3C Impurities
Analytical Parameters:
1. Detection Limit (DL)
2. Quantitation Limit (QL)
3. Linearity
4. Accuracy
5. Precision
6. Specificity
Residual Solvent Testing Steps:
1. Sample preparation
2. Instrument setup and calibration
3. Injection/injection port conditions
4. Column selection and temperature programming
5. Detection and quantitation
6. Data analysis and reporting
Common Residual Solvent Testing Instruments:
1. Agilent GC-MS
2. Thermo Fisher Scientific GC-MS
3. Waters LC-MS
4. PerkinElmer GC-MS
5. Shimadzu GC-MS
Residual Solvent Testing Laboratories:
1. Contract research organizations (CROs)
2. Pharmaceutical company laboratories
3. Third-party testing laboratories
4. Government laboratories
Certifications and Accreditation:
1. ISO/IEC 17025
2. Good Laboratory Practice (GLP)
3. Current Good Manufacturing Practice (cGMP)
By following standardized testing protocols and using suitable analytical techniques, laboratories can accurately detect and quantify residual solvents.
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