Preservative Testing

Preservatives are natural or synthetic chemicals that prevent spoilage or any undesirable chemical changes caused by microbial growth. Preservatives are mainly added to foods, pharmaceuticals, pigments and biological specimens to delay spoilage caused by microbial growth or chemical changes.

In order to prevent the phenomenon of food poisoning caused by excessive preservatives, the amount of preservatives added in food must be strictly controlled. The preservative testing is an effective measure to ensure the rational use of preservatives. Preservative testing can conduct qualitative and quantitative analysis of the types and content of preservatives in food, provide technical support for food quality control and safety monitoring, and protect the health and legitimate rights and interests of consumers.

STEMart provides comprehensive preservative testing services to ensure that preservatives added to food comply with industry standards and regulations, and promote the smooth marketing and sales of products.

Test Samples

Benzoic acid and its salts, sorbate and its salts, dehydroacetic acid and sodium salts, parabens, sodium diacetate, calcium propionate, sodium lactate, biological food preservative, nisin, natamycin, ε-polylysine, lysozyme, etc.

Standard Tests

• Sensory testing
  • Appearance
  • Smell
  • Colour and lustre
• Component analysis
• Content testing
  • Preservative content
  • Moisture content
  • Ash content
  • Lead content
  • Arsenic content
  • Other heavy metal content
• Physical and chemical index testing
  • pH value
  • Stability
  • Drying loss
  • Burning residue
  • Infrared discrimination
  • Optical activity
  • Density
  • Peroxide number
  • Specific volume
  • Expansion rate
• Safety testing
  • Toxicity
  • Irritability
• Microbial testing

For more information about our preservative testing services, please contact us.