Absolutes and concretes
A concrete is obtained by solvent extraction of a fresh raw material of vegetable origin; an absolute is obtained by ethanol extraction of a concrete, in order to eliminate the waxes.
The analytical services offered by the laboratory Pyrenessences Analyses on absolutes:
Chromatographic profile
Absolutes and concretes are complex mixtures whose composition can be determined by gas chromatography. The chromatographic profile of an absolute presents all the identified molecules.
Specific gravity
Ratio between the density of the sample and that of pure water at a given temperature.
Refractive index
Characteristic index of the behavior of light in the sample.
Optical rotation
Property that some samples have to rotate the plane of polarization of the light passing through them – related to the possible presence of chiral molecules.
Flash point
The minimum temperature at which vapors emitted from the sample will deflagrate upon contact with a flame or hot spot – for example, when transporting a material, this measurement may be necessary.
Peroxide value
The peroxide value expresses the amount of oxygen chemically bound to a substance in the form of peroxides and thus makes it possible to evaluate its oxidation state.
Acid value
The acid value expresses the amount of potassium hydroxide required to neutralize the free acids in a sample.
Multi-residue analysis of pesticides
The laboratory offers a multi-residue analysis of pesticides in absolutes.
List of target molecules:
Alachlor
Aldrine
Atrazine
Azinphos Ethyl-
Azinphos Methyl-
Benalaxyl
Bifenthrine
Bitertanols
Bromophos Ethyl-
Bromophos Methyl-
Bromopropylate
Carbofuran
Chlordane cis-
Chlordane trans-
Chlorfenvinphos
Chlorobenzilate
Chlorothalonil
Chlorpropham
Chlorpyriphos Ethyl-
Chlorpyriphos Methyl-
Chlorthal Dimethyl-
Clomazone
Coumaphos
Cyfluthrines
Cyhalothrineλ-
Cypermethrines
DDD o,p’-
DDD p,p’- + DDT o,p’-
DDE o,p’-
DDE p,p’-
DDT p,p’-
Deltamethrines
Diazinon
Dichlofenthion
Dichlofluanide
Diclofop Methyl-
Diethofencarb
Difenoconazols
Diflufenican
Dimethoate
Diphenylamine
Endosulfanα-
Endosulfanβ-
Endosulfan sulfate
Endrine
Ethion
Ethofumesate
Ethoprophos
Etridiazole
Etrimphos
Fenamiphos
Fenarimol
Fenchlorphos
Fenoxycarb
Fenpropathrine
Fenpropimorphe
Fensulfothion
Fenthion
Fenvalerates
Fluazifop p-Butyl-
Flucythrinates
Flusilazole
Flutolanil
Flutriafol
Fonofos
HCH α-
HCH β- + Lindane
HCH δ-
Heptachlore
Heptachlor epoxide
Hexachlorobenzene
Hexaconazole
Iprodione
Malaoxon
Malathion
Mecarbam
Metalaxyl
Metazachlor
Methacrifos
Methidathion
Methiocarb
Methoxychlore
Metolachlor
Mirex
Monalide
Monocrotophos
Myclobutanil
Napropamide
Omethoate
o-Phenylphenol
Oxadiazon
Oxadixyl
Penconazole
Pentachloroaniline
Pentachloroanisole
Permethrines
Phosalone
Phosmet
Piperonyl butoxide
Pirimicarb
Pirimiphos Ethyl-
Pirimiphos Methyl-
Prochloraz
Procymidone
Profenophos
Propiconazols
Propyzamide
Prothiofos
Pyridaben
Pyridaphenthion
Pyrimethanil
Quinalphos
Quizalofop Ethyl-
S421
Sebuthylazine
Tebuconazole
Terbufos
Terbuthylazine
Tetradifon
Tetramethrines
Tolclofos Methyl-
Tolylfluanid
Triadimefon
Triadimenol
Triazophos
Vinclozoline
Search for traces of phthalates
Absolutes that have been in contact with certain materials can sometimes contain traces of phthalates, so it may be worth looking for them.
List of target molecules (subject to feasibility):
Di-Methyl-Phthalate DMP
Di-Ethyl-Phthalate DEP
Di-Iso-Butyl-Phthalate DIBP
Di-Butyl-Phthalate DBP
Di-Pentyl-Phthalate DnPP
Butyl-Benzyl-Phthalate BBP
Di-CycloHexyl-Phthalate DCHP
Di-Ethyl-Hexyl-Phthalate DEHP
Di-n-Octyl-Phthalate DnOP
Essential oils
and aromatic synergies
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Floral waters
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Vegetable oils
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Spices
& herbs
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