Analysis of di(2-ethylhexyl) phthalate in polyvinyl chloride and monosodium glutamate in foodstuff using high performance liquid chromatography and the investigation of microwave digestion method for paint analysis

1989 ◽  
Author(s):  
Shin-kwan, Andrew Tang
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Polyvinyl Chloride ◽  
High Performance ◽  
Microwave Digestion ◽  
Monosodium Glutamate ◽  
Digestion Method ◽  
Paint Analysis ◽  
Ethylhexyl Phthalate

Off-Line SFE of Bis(2-ethylhexyl) Phthalate from PVC Materials

1995 ◽  
Vol 60 (7) ◽  
pp. 1109-1114 ◽  
Author(s):  
Karel Ventura ◽  
Richard Kovář ◽  
Milena Mikešová ◽  
Pavel Karásek ◽  
Jiří Vejrosta
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Supercritical Fluid ◽  
High Performance ◽  
Fused Silica ◽  
Bulk Liquid ◽  
Operating Parameters ◽  
Fused Silica Capillary ◽  
Ethylhexyl Phthalate ◽  
Silica Capillary

Off-line supercritical fluid extraction with pure CO2 was used to isolate and quantify bis(2-ethylhexyl) phthalate (DIOP) from PVC samples. Two modes of analyte trapping, onto an inner solid surface of a fused silica capillary (i.d. 0.5 mm) and direct bubbling through a bulk liquid (2-propanol), have been compared. Collected samples were analyzed by high performance liquid chromatography with UV detection. Quantitative recovery of over 95% was obtained in spite of limited operating parameters of home-made SFE device (maximum of pressure 30 MPa and of temperature 70 °C) for samples containing 10 or less wt.% of DIOP.

scholarly journals Migration of Contaminants from Milk Tubes and Teat Liners

1987 ◽  
Vol 50 (4) ◽  
pp. 316-320 ◽  
Author(s):  
RISTO M. RUUSKA ◽  
HANNU KORKEALA ◽  
HELENA LIUKKONEN-LILJA ◽  
TAPANI SUORTTI ◽  
KALEVI SALMINEN
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Water Extract ◽  
Evaporation Residue ◽  
Reverse Phase Hplc ◽  
Reverse Phase ◽  
Flexible Tubes ◽  
Ethylhexyl Phthalate ◽  
Polymeric Plasticizer

The survey tested migration of contaminants from various flexible tubes and teat liners used in milk production. A total of 19 samples were analyzed through sensory evaluation and in migration tests with different simulant liquids. Plasticizers were dissolved in diethyl ether or tetrahydrofuran and analyzed in high performance liquid chromatography (HPLC). The most widely used polyvinyl chloride (PVC) tubes contained 37–40% di-2-ethylhexyl phthalate (DEHP) as plasticizer. In some tubes DEHP was to a great extent replaced by a polymeric plasticizer. DEHP was analyzed with reverse phase HPLC directly from milk in a procedure in which a piece of tube was soaked in milk for 1, 3 and 6 d. Tubes containing polymeric plasticizer lost less DEHP into milk, but relatively more than the tubes plastieized only by DEHP. The evaporation residue for migration tests to water was significantly greater for polyadipate tubes compared with tubes plastieized only by DEHP. The evaporation residue from the water extract of the tubes plastieized by polymeric plasticizer was by mass-speetral analysis found to consist of various hydrolyzation products of polyester from 1,3-butandiol and adipic acid. The results obtained are discussed in the light of toxieologieal problems connected with plasticizers.

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