Pharmaceutical Particle Library Preparation for Contact and Non-Contact Parts

We, Confianca Pharmazon (Confianca Technologies LLP) have developed lab at Ahmedabad for Library Preparation.  

Sample Library Preparation: We Indetified below Metioned Material for Charaterization

Techniques and Instruments used for the Characterization of Library

ANNEXURE:1

1.0 ELEMENTAL ANALYSIS OF TARGET ELEMENTS

(1.1) INTRODUCTION

Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) is an advanced analytical technique used for the characterization and elemental identification of particulate matter and contaminants. The technique combines high-resolution imaging capabilities of Scanning Electron Microscopy (SEM) with elemental composition analysis provided by Energy Dispersive Spectroscopy (EDS).

SEM enables detailed examination of particle morphology, including shape, size, texture, and surface characteristics, whereas EDS facilitates identification and semi-quantitative determination of elemental composition through X-ray emission generated from the sample during electron beam interaction.

SEM-EDS is extensively applied in contamination investigations, material characterization, and root cause analysis of particulate matter due to its ability to identify unknown contaminants while preserving the structural integrity of the sample. The technique is particularly useful for differentiating metallic, polymeric, glass, rubber, and extrinsic particulate contaminants encountered during routine manufacturing processes.

(1.2) STANDARD OPERATING PROCEDURE FOR ELEMENTAL ANALYSIS BY SEM WITH EDS

Sample Preparation for SEM-EDS Analysis

STEP 1: Sample Preparation

The particulate sample is visually examined and prepared based on its physical state. Liquid and semi-solid samples, where applicable, are dried under controlled temperature conditions (30–40°C) to remove excess moisture before analysis.

STEP 2: Sample Mounting

The selected particulate matter is carefully mounted onto a standard SEM specimen disc (50 mm or 125 mm) using appropriate adhesive tape:

• Carbon tape for solid samples
• Copper tape for liquid or semi-solid samples

The sample is positioned carefully to avoid particle displacement during analysis.

STEP 3: Conductive Coating using Gold (If required)

Non-conductive samples are coated with a thin conductive layer of gold to minimize charging effects during electron beam interaction. The thickness of the conductive coating is selected according to sample characteristics to ensure proper imaging and elemental detection.

STEP 4: Vacuum Generation

The mounted sample is placed inside the SEM chamber. The instrument is operated under vacuum conditions, typically requiring approximately 5 minutes to establish the required vacuum environment before analysis.

STEP 5: Electron Beam and Imaging

The electron beam generated through a tungsten filament source is focused onto the sample surface using condenser and objective lenses. Appropriate imaging conditions are selected depending on the sample type:

Working Distance:

• SEM Imaging: approximately 5 mm
• EDS Analysis: approximately 10 mm

Accelerating Voltage:

• Solid Samples: 5–30 kV
• Liquid/Semi-solid Samples: 3–15 kV

Multiple microscopic images are captured at suitable magnifications to evaluate particle morphology, surface characteristics, and contamination features.

STEP 6: Elemental Analysis by EDS

The targeted particulate region is subjected to EDS analysis to identify elemental composition. The emitted X-ray spectra are analyzed to determine:

• Element identification
• Elemental percentage composition
• Material purity assessment
• Characteristic spectral peaks of detected elements

Multiple scans may be performed to improve data reliability and reproducibility.

STEP 7: Data Evaluation

The obtained SEM images and EDS elemental profiles are reviewed and interpreted to support contaminant identification, material differentiation, and contamination source investigation.

Example of SEM with EDS data of Sample Id. Exp-001.

Example of SEM with EDS data of Sample Id. Exp-002.

Example of SEM with EDS data of Sample Id. Exp-003.

Example of Electron Image of Sample Id . Exp-001: Site 1

Example of EDS Monograph of Sample Id . Exp-001: Site 1

Example of EDS Monograph Table of Sample Id . Exp-001: Site 1

ANNEXURE: 2

2.0 Material Fingerprint Profiling through IR Spectroscopy

2.1 Introduction

Fourier Transform Infrared (FTIR) Spectroscopy is an analytical technique utilized to identify the chemical composition and molecular characteristics of materials through the absorption of infrared radiation. When infrared energy interacts with a sample, molecular vibrations occur within chemical bonds, generating an interferogram. This interferogram is subsequently converted into an infrared (IR) spectrum, which provides valuable information regarding the molecular structure and functional groups present in the material. FTIR analysis is widely employed for material identification, contamination assessment, and comparative fingerprint profiling.

2.2 Standard Operating Procedure (SOP) for FTIR Analysis

Step 1: Instrument Initialization

• Switch on the FTIR instrument along with the connected computer system.
• Allow the instrument to complete initialization, indicated by three beep signals confirming readiness.
• Open the Spectra Manager software and navigate to Spectra Measurement mode.

Step 2: Instrument Preparation

• Verify that the ATR (Attenuated Total Reflectance) crystal is clean and free from contamination.
• Carefully clean the crystal surface and surrounding area using methanol and a lint-free Kim-wipe.
• Avoid the use of acetone or excessive solvent to prevent potential damage to the crystal surface.

Step 3: Parameter Setting and Background Acquisition

• Confirm the predefined analytical parameters (e.g., 16 scans and 4 cm⁻¹ spectral resolution).
• Ensure the ATR crystal is free from any sample before recording the background.
• Select:
  • B Monitor to preview the background spectrum.
  • Bkg to acquire and store the background reference spectrum.

Step 4: Sample Analysis

• Place the sample appropriately on the ATR crystal and secure it gently using the pressure lid.
• Select S Monitor to preview the sample spectrum and then proceed with Sample to initiate measurement.
• The acquired spectrum will automatically be transferred to the Spectra Analysis interface for evaluation.

Step 5: Data Processing and Post-Analysis Cleaning

• Save the acquired spectrum file and apply standard spectral processing techniques, including:
  • ATR Correction
  • CO₂ Correction
  • Automatic Baseline Correction
  • Peak Identification (Peak Find)
• Upon completion of the analysis, clean the ATR crystal and pressure pin thoroughly using methanol.
• Ensure the instrument is maintained in a clean condition for subsequent use.

(2.3) CHARACTERISTIC IR PEAK POSITION FOR VARIOUS SAMPLES

IR DATA: Exp:001

ANNEXURE: 3

Thermal Analysis

3.1 Introduction

Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), and Derivative Thermogravimetric Analysis (DTG) are advanced thermoanalytical techniques used for evaluating the thermal behavior, thermal stability, and physicochemical properties of materials under controlled heating conditions.

Differential Scanning Calorimetry (DSC) measures the heat flow associated with thermal transitions occurring in a material as a function of temperature or time. The technique provides information regarding melting behavior, crystallization, glass transition temperature (Tg), phase transformation, and thermal stability of materials.

Thermogravimetric Analysis (TGA) evaluates changes in sample mass with increasing temperature, thereby enabling assessment of thermal degradation, decomposition profile, volatile matter, moisture content, and compositional stability.

Derivative Thermogravimetric Analysis (DTG) represents the rate of weight loss as a function of temperature and assists in identifying decomposition stages and maximum degradation temperatures of the material.

Simultaneous thermal analysis enables the acquisition of DSC, TGA, and DTG data in a single experimental run, thereby generating a comprehensive thermal fingerprint profile for material characterization, comparative analysis, and source identification.

3.2 Standard Operating Procedure (SOP) for Thermal Characterization by STA

Step 1: Instrument Initialization

• Switch on the Simultaneous Thermal Analyzer (STA) instrument and the associated computer system.
• Allow the instrument to complete initialization and stabilization as per operational requirements.
• Launch the thermal analysis software and verify instrument readiness before analysis.

Step 2: Sample Preparation

• Ensure the sample is clean, dry, and free from external contamination.
• Accurately weigh the required amount of sample (typically 2–20 mg, depending on material type and analytical requirements).
• Place the sample into a suitable crucible/pan and prepare an empty reference crucible for comparison.

Step 3: Method Setup and Parameter Configuration

• Load the sample and reference crucibles into the designated sample holder positions.
• Configure the analytical parameters, including:
  • Temperature range (as per study requirement)
  • Heating rate (typically 10°C/min)
  • Purge gas atmosphere and flow rate (e.g., Nitrogen atmosphere)

Step 4: Thermal Analysis

• Initiate the programmed heating cycle to begin analysis.
• During analysis:
  • DSC records heat flow changes associated with thermal transitions.
  • TGA measures changes in sample weight with temperature.
  • DTG evaluates the rate of mass loss and decomposition behaviour.

Step 5: Data Analysis and Interpretation

• Evaluate the generated thermal curves for significant thermal events, including:
  • Melting temperature (Tm)
  • Glass transition behaviour
  • Thermal degradation pattern
  • Weight loss profile (%)
  • Maximum decomposition temperature (DTG peak)

• Save and export analytical data for comparative thermal fingerprint profiling and material characterization.

Step 6: Post-Analysis Cleaning and Shutdown

ANNEXURE: 4

3.0 Microscopic Analysis

4.1 Introduction

Microscopic analysis is a widely used analytical technique for examining the structural and morphological characteristics of materials, chemicals, and particulate matter at micro and nano scales. The technique enables detailed evaluation of particle size, shape, surface texture, and structural features, thereby assisting in material identification and contaminant investigation. Microscopy is particularly useful for understanding the morphology and physical characteristics of unknown particles and foreign matter.

4.2 Standard Operating Procedure (SOP) for Microscopic Analysis

Step 1: Sample Preparation and Observation

• Particles resembling the actual contaminants, typically ranging from 50–500 µm, are carefully prepared for analysis.
• The prepared particles are placed appropriately and observed under the microscope for detailed examination of their physical and morphological characteristics.

Step 2: Image Acquisition and Morphological Assessment

• Microscopic images of the particles are captured at the highest available magnification (5X) to obtain detailed visual characteristics.
• Images are recorded under black or white backgrounds based on the colour of the particle to facilitate enhanced visualization and better interpretation of particle morphology and structural appearance.

Exp:001: Microscopic Image

Frequently Asked Questions

1. What is pharmaceutical particle library preparation?

Pharmaceutical particle library preparation involves collecting and characterising known materials from a manufacturing facility to create an analytical reference database. This library helps compare unknown particles with potential contamination sources during investigations.

2. What are product-contact and non-contact parts?

Product-contact parts directly touch the pharmaceutical product during processing, transfer or storage. Examples include tubing, filters, gaskets and filling components.

Non-contact parts do not directly touch the product but may contribute particles to the surrounding environment. Their inclusion depends on their location and potential contamination risk.

3. How does a particle reference library help investigate contamination?

When an unknown particle is detected, its characteristics can be compared with reference materials in the library. Similarities in appearance, elemental composition, molecular fingerprints and thermal behaviour help narrow down potential sources and guide further investigation.

4. Which analytical techniques does Confianca Pharmazon use?

We provide material characterisation using scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS), Fourier-transform infrared spectroscopy (FTIR), thermal analysis such as DSC and TGA, and microscopic examination. The combination of techniques depends on the material and agreed study scope.

5. What materials can be included in the reference library?

The library can include gaskets, seals, rubber stoppers, tubing, filters, glass, stainless-steel components, gloves, packaging materials and other relevant manufacturing components. We work with your team to identify materials appropriate to your facility and process.

6. Does every sample require all four analytical techniques?

No. The appropriate techniques depend on the sample’s composition, size, condition and the information required. Complementary methods are selected where they add useful evidence for material identification and comparison.

7. Does Confianca Pharmazon assist with identifying components for library preparation?

Yes. We work with your team to identify relevant product-contact and non-contact materials. An optional Gemba walk can support the assessment of potential particle sources within your manufacturing process.

8. What samples should we provide for library preparation?

Clients generally provide representative material samples or coupons from the selected components. Where available, include the component name, material of construction, supplier details and equipment or process location. Sample quantity and preparation requirements should be agreed before dispatch.

9. What documentation is provided with the library?

Depending on the agreed scope, documentation may include sample identification details, microscopic images, SEM-EDS elemental profiles, FTIR spectra, thermal-analysis results and supporting observations. These records connect each reference material with its analytical characteristics.

10. Can a library match confirm the exact source of an unknown particle?

A match can indicate a probable source, but it does not automatically confirm the exact component responsible. Different components may contain similar materials. Analytical findings should therefore be assessed alongside equipment condition, maintenance history and manufacturing-process evidence.

11. When should a pharmaceutical particle library be updated?

The library should be reviewed when relevant materials, suppliers, equipment or processes change, or when an investigation identifies a potential source that is not already included. Updates help keep the reference information representative of the facility.

12. How can we request a quotation for library preparation?

Contact Confianca Pharmazon with your component list, approximate sample count and analytical requirements. Our team will discuss the scope and provide a quotation.

Phone: +91 9173319482
Email: gaurav@confiancapharmazon.com
Location: Ahmedabad, Gujarat, India