• Testing
• Services
• Laboratories

• 1.Cosmetics 
  • Tests of cosmetics products 
  • Solar products tests 
• 2.Detergent 
  • Performances Test
  • Chemical tests
  •  Microbiological / Rheological tests
• 3. Textile
  • Chemical tests
  • Physical-mechanical tests 
  • Microbiological tests
• 4.Materials in contact with foodstuffs 
  • Technical - scientific assistance
  • Plastic material : normative aspects
  • Plastic material: proposed services
  • Capsules for glasses 
  • Gums
  • Paper and paperboard 
  • Metals and alloys
  • Ceramic
  • Glass
  • Corks
  • Silicones
• 5.Reology
  • Rheological analysis 
• 6.Hygienic products with absorbing properties
  • Analysis on incontinence aids for adults
  • Analysis on  baby  napkins
  • Analysis on  sanitary towels and panty-liners
• 7.Biodegradability

MATERIALS IN CONTACT WITH FOODSTUFFS

Capsules for alimentary preserves: specific and overall migration in oil

Nowadays the totality of foodstuffs is marketed and packaged in a different way. In particularly for humid and perishable products, the most used primary packaging is jar with hermetic closure by cover screw.
Hermetic closure is reached not only by mechanical power of the clamping of the cover, but also by the chemical composition and the dimensions of the ring – shaped seal inside the cover.
From 2004 the communitarian laboratories, and particularly the laboratory of Zurich (official laboratory for the control of foodstuff) have noticed the existence of foodstuff contamination from substances constituting the cover. They have demonstrated by chemical analysis based on extraction procedures, clean up and quantification that in most of cases the checked contamination levels greatly exceeded the law limits.
To avoid the total block of these products in the territory of European Community was introduced in a period of transition sanctioned of the Regulation CE 372/2007 which has in fact risen the limits of different substances compared to those reported in the EU directive (2002/72/CE and following modifications) and the national decree (DM 21/03/73 and following modifications) concerning materials and plastic objects destined to contact with foodstuffs.
Chelab is able to supply complete analytical services and technical and scientific assistance to ensure the knowledge of chemical phenomena which might happen during the preservation of the product in oil or humid and perishable condition in the glass jar.

• ESBO – ELO: the determination performed by HPLC equipped with detector mass. The detection limit for foodstuff is 5 mg/kg expressed in the fat and in the sample as is and is related to the amount of fat  present  in the sample. In the mastic and in the plastic material is 50 mg/kg and in the capsules is 0,005 mg/capsule.
  
  
• PHTHALATES: the method  allows the determination of residues of phthalates in plastic material, cosmetic products, paper, capsules destined to the contact with  foodstuffs. The phthalates in objects are: dicyclohexyl phthalate, dimethyl- phthalate, diethyl phthalate, diisobutyl phthalate, diisodecyl phthalate, diisononyl phthalate, diisooctyl phthalate, di-n-amyl phthalate, di-n-octyl phthalate, bis -2- ethylhexyl phthalate and butyl-benzyl-phthalate. The principles are extracted with a suitable solvent. The obtained extract, opportunely diluted, are analysed in a gaschromatographer equipped with detector mass, the limit of detection from the foodstuff, except oils and fats, is of 2 mg/kg for diisooctyl phthalate, diisononyl phthalate, and diiodecyl phthalate and of 0,5 mg/kg for other phthalates. The limit of detection for the capsules is expressed as mg/capsule and depending  from total surface of the analysed capsules. The analysis is performed on a number of capsules with a total surface of about 150 cm2 which corresponds  a limit of detection of 1 mg for every phthalate. The limit of detection for the others matrixes is 10 mg/kg for every phthalate.
  
  
• POLYADIPATES: the polyadipates are simultaneously determined in two different ways: in a side, after hydrolysis and transesterification, are analysed by LC/MS/MS through the detection of di-methyl esters of adipic acid and on the other side, after the extraction with suitable solvent and following dilution in mobile phase, detected in LC/MS like molecules as they are. In both cases, the positive ionization in acid condition and an ESI source are used. The limit of detection of the method is 3 mg/Kg(expressed in lipid fraction).
  
  
• DIBUTYLSEBACATE: the sample undergoes to extraction with a suitable solvent  subsequently removed for evaporation. The dry extract is then resumed by mobile phase, purified by SPE and analysed by LC/MS/MS and by a ESI source in positive modality. The  limit of detection of the method  is 1 mg/Kg.
  
  
• EURUCAMIDE and OLEAMIDE: the principles migrated from plastic material or from capsule are determined on the simulant liquid, performing an extraction by a suitable solvent; then, the extracts are analysed by GC/MS.
  The limit of detection, for every principle, is 10 mg/kg for oils derived from leaching liquid and for plastic materials. The limit of detection for the capsules is 1/n mg/capsules where n is the number of analysed capsules. The analysis is performed on a number of capsules with a total surface of about 150 cm2 which corresponds to a limit of detection of 1 mg for every principle.
  
  
• ACETYL TRIBUTYL CITRATE: the detection is by GC/MS/MS performed on a EI source with electronic impact. The limit of detection of the method is 6 mg/Kg.

Download  PDF

FOR TECHNICAL AND COMMERCIAL INFORMATION  -