Instrumentation & Techniques

Analytical Services

Gateway Analytical offers standard and innovative analytical techniques for a variety of services and sample types.  From drug development to product contamination, our experts have more than 20 years of diverse industry experience advising customers on tough scientific issues.

Vega 5136MM with OxfordMicroscopy

From standard optical microscopy to chemical analysis, Gateway Analytical offers a variety of different analyses based on microscopic investigation.

Microscopic techniques include:

  • Comparison
  • Fluorescence
  • Optical Comparison
  • Polarized Light
  • Scanning Electron Microscopy


From foreign particulate identification to fiber analysis, Gateway Analytical employs the instrumentation and professional expertise for a variety of spectroscopic investigations to help you overcome your biggest hurdles.

Spectroscopic techniques include:

  • Raman
  • Fourier Transform Infrared
  • Scanning Electron Microscopy / Energy Dispersive Spectroscopy
  • Raman/LIBS

HIAC Particle Sizing

Gateway now offers a full suite of HIAC testing services designed to provide solutions for USP <788> and <789> compliance. We leverage state-of-the-art HIAC liquid particle counting technology with expert scientific analysis and clear, concise reporting to deliver the fast, accurate, reliable results that you have come to expect from the leader in particle analysis.

HIAC Particle Sizing Provides:

  • Compliance with USP <788> and <789> standards
  • Quantification of foreign particulate matter


rap.ID_SPERaman / LIBS using the Single Particle Explorer Is raman.ID + Metal.ID system

Using the Single Particle Explorer Is raman.ID + Metal.ID system Gateway Analytical can determine the size, shape and chemical composition of hundreds of metallic, organic and inorganic particles ranging from as small as 2µm. This system uses a unique combination of imaging analysis and spectroscopy that allows the chemical characterization of hundreds of particles per hour. This allows Gateway Analytical to quickly and reliably identify all particle materials by their spectroscopic fingerprints.

Raman/LIBS analysis provides:

  • Number,size: Feret’s diameter (longest dimension)
  • Shape: Aspect ratio, angularity, rectangularity, elongation, area, perimeter, circularity, solidity, fibrosity, convexity, and height
  • Particle color image: Collects and documents high resolution color images of particles

FALCON IIChemical Imaging

Chemical imaging creates a map of a sample’s unique chemical or biological information from each pixel in the image by simultaneously obtaining spectral and spatial data. Gateway Analytical provides this unique service to complement traditional analytical testing, offering a more complete characterization package. Commonly used for simultaneous particle identification and sizing, material distribution, sample visualization and coating measurement.

Chemical imaging techniques include:

  • Fluorescence
  • Near-Infrared
  • Raman
  • Visible

Specialized Sample Preparation

Gateway Analytical experts are trained to handle a variety of sample types and can accommodate your specialized sample preparation needs, including:

  • Vacuum filtration
  • Sample cross sectioning