Food Analysis

You analyze food to identify ingredients and additives as well as undesirable substances such as mycotoxins, heavy metals or prohibited substances. Foreign material has to be identified with food analysis methods for safety reasons, as well as to maintain good customer relations. You use microscopy to identify glass fragments, metals, plastics and stones as well as fragments from the food itself. In your laboratory you proceed fertilizer and pesticide controls. You investigate causes of food deterioration and develop preservation methods. Also, the microstructure of food is of particular interest for you as it significantly affects properties, behavior, flavor and texture of food. You need to understand the processes leading to various structures such as foams, emulsions, dispersions, extrudes and fibers.

Examine foreign material with stereo microscopes with low magnifications. You’ll get a preliminary identification of the unknown material and can select the proper method for further analysis of the particle. Receive information about how the particle was generated, and whether it was incorporated into the product during manufacturing or inserted by the customer.

To carry out more profound examinations you use light microscopes with brightfield, polarization and fluorescence contrast. Some food components are birefringent, including starch, fats, plant cell walls, muscle fibers as well as many flavor ingredients. Polarization contrast is invaluable to examine such crystalline materials. In conjunction with Linkam heating stages you observe the effects of tempering (e.g. ageing) on those structures. To detect microorganisms such as bacteria fluorescence microscopy of stained samples is valuable for you. Gram staining is typically used to study and view bacteria such as Staphylococcus aureus, E. coli, Salmonella, Campylobacter and Shigella. Blue staining of starch with iodine is a valuable method as well as Fast Green FCF or Acid Fuchsin especially for the localization of proteins. Because most food materials contain large amounts of water and/or fat, Environmental Scanning Electron Microscopes (Environmental SEM) that enable control of both variable pressure and moisture within the sample chamber offer great advantages for the study of food systems without the need for either freezing or drying.

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White Papers for Life Sciences

White Paper: Diffraction Contrast Tomography

Unlocking Crystallographic Information from Laboratory X-ray Microscopy

Pages: 6
Filesize: 1,045 kB

Application Note: Fast Imaging of Cellular Spheroids with Light Sheet Fluorescence Microscopy

Application Note

Pages: 6
Filesize: 825 kB

Application Note: Adjusting Refractive Index for Clearing Applications

Pages: 5
Filesize: 1,149 kB

Technology Note: Control of External Devices During Time Series Acquisition with ZEISS Lightsheet Z.1

Integration of Daylight Illumination into Time Lapse Experiments

Pages: 6
Filesize: 1,862 kB

White Paper: Correlation of Two-Photon in Vivo Imaging and FIB-SEM Microscopy

Pages: 6
Filesize: 1,590 kB

White Paper: Fast Imaging and Analysis with High Probe Current and High Resolution with ZEISS MERLIN

GEMINI II optimizes the electron optics at all possible operating conditions to provide best possible resolution from very low to very high probe currents

Pages: 5
Filesize: 5,354 kB

White Paper: High Resolution Imaging at Low Acceleration Voltages and Low Beam Currents with ZEISS MERLIN

MERLIN combines high resolution imaging, optimized at all energies, with unprecedented ease of use for material and life science applications

Pages: 7
Filesize: 948 kB

White Paper: Beam Deceleration Imaging with ZEISS EVO

Receive high quality images with enhanced surface contrast and topographical detail for low kV imaging and life science samples

Pages: 6
Filesize: 845 kB

White Paper: Fluorescence Polarization/Anisotropy Imaging with LSM 710 / LSM 780

G-Factor Correction with Anisotropy Standard

Pages: 6
Filesize: 745 kB

White Paper: Laser Microdissection

A Key Technology for Targeted Therapy in Lung Cancer

Pages: 4
Filesize: 381 kB