Foodstuff analysis - Other compounds

 

Poly-cyclic hydrocarbons (PAH, to EPA)

Sample preparation

Food samples

DFG S19 (gel permeation chromatography/silica gel)

Soil samples

DFG S19 (gel permeation chromatography/silica gel)

Water samples

solid phase extraction (SPE))

solid-phase micro-extraction (SPME))

solid-phase dynamic-extraction (in preparation)

The extracts obtained from the sample preparation are measured and evaluated on the Saturn 2000 (GC-MS/MS). In particular, the MS/MS mode improves the display sensitivity (by reducing the disturbing background) in combination with the temperature and pressure-programmed injector.

Acenaphthalen

Chrysen

Acenaphthen

Dibenzo(a,h)anthracen

Anthracen

Fluoranthen

Benzo(a)anthracen

Fluoren

Benzo(b)fluoranthen

Indeno(1,2,3,c,d)pyren

Benzo(k)fluoranthen

Naphthalin

Benzo(g,h,i)perylen

Phenanthren

Benzo(a)pyren

Pyren

 

Chloride/alkyl phenols

We determine these substances in water and soil samples to DIN 38407 part 15 by means of GC-MS-NCI. The determination thresholds are under 10 µg/kg or 10 ng/l. The sample preparation contains an extractive derivatisation with subsequent column chromatographic treatment.
 

Phenol /D6

Chlorphenol (o)

Methylphenol (o)

Chlorphenol (m)

Methylphenol (m)

Chlorphenol (p)

Methylphenol (p)

Dichlorphenol (2,3)

Dimethylphenol (2,3)

Dichlorphenol (2,4)

Dimethylphenol (2,4)

Dichlorphenol (2,5)

Dimethylphenol (2,5)

Dichlorphenol (2,6)

Dimethylphenol (2,6)

Dichlorphenol (3,4)

Dimethylphenol (3,4)

Dichlorphenol (3,5)

Dimethylphenol (3,5)

Trichlorphenol (2,3,4)

Ethylphenol (o)

Trichlorphenol (2,4,5)

Ethylphenol (m)

Tetrachlorphenol (2,3,5,6)

Ethylphenol (p)

PCP / PCP 13C6

 

Octyl and nonyl phenol

These aklyl phenols used as stabilisers in plastics migrate into watery phases and can be proven there in contents of µg/l. To determine them, we use a validated method (immersion SPME with GC/MS/MS, fully automated).  
 
The determination threshold is in the area of our laboratory blind figure for tap water, at 50 ng techn. nonyl phenol/l.

 
 

MOH (mineral oil hydrocarbons)

After successful implementation of three projects for gas chromatography determination of MOH in water and soil, we are now also offering this service. The determination in water samples is done by means of SPME-GC-MS, with determination thresholds of 0.1 mg/l for diesel and <<0.01 mg/l for individual aliphates.
 
The determination of the MOH in soil samples is done on the basis of ISO/TR 11046. The soil samples are extracted with petrol ether, the extracts are treated and subsequently measured on a GC-MS or GC-FID. External quantifications are done against suitable comparative mixtures. 
 
  


Nitro-musk compounds

Nitro-musk compounds are widely used as odoriferous substances for cosmetic products and detergents. They are highly persistant and can be found in any environmental compartment. Therefore great efforts are done to replace these compounds by those mentioned under position 19.Using the same clean-up (refer to pos. 1) and an additional detection system nitro-musk compounds can be determined within the screening analysis..

Moschus-Keton

Moschus-Xylol

Moschus-Ambrette

Moschus-NN

 


Poly-cyclic musk compounds

Poly-cyclic musk compounds are persistant too. They accumulate in biological matrices and were found in surface water and fatty foods. Using the same clean-up (refer to pos. 1) and an additional detection system nitro-musk compounds can be determined within the screening analysis.
 

ADBI (Celestolid)

AHMI (Phantolid)

AHTN (Tonalid)muss man halt

ATII (Traseolid)

DPMI (Cashmeran)

HHCB (Galaxolid)

 


ITX - Isopropylthioxanthone

ITX is used as photoinitiator for the offset printing of lables and packaging materials. Trace were detected in baby-milk in november 2005. In four European countries such products were taken from the market.

SOFIA GmbH has implemented the analytical method to determine ITX in packagings and foods.

Important link: Bundesinstitut für Risikobewertung (BfR)

 

Missing substances, e.g. brominated flame-proofing agents (PBDPE, PBB, bromide aliphates)

There are naturally also substances which are not listed.  

In these cases:

Do not hesitate to challenge us !

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