Highly sensitive determination of a polymeric hindered amine light stabilizer in polypropylene by reactive thermal desorption-gas chromatography using nitrogen-specific detection.
Highly sensitive and specific determination of trace amounts of a polymeric hindered amine light stabilizer (HALS) in polypropylene (PP) materials could be established by improving reactive thermal desorption-gas chromatography (RTD-GC) in the presence of an organic alkali, tetramethylammonium hydroxide. By using nitrogen-phosphorus detection, highly selective detection of the HALS-related components was attained. In addition, the use of a polar poly(ethylene glycol) separation column alleviated the adsorption of minor specific pyrolysis products. This modified RTD-GC method allowed the determination of the polymeric HALS (Mr 1900) in PP even for trace concentrations between 100 and 500 ppm, through observing selectively the characteristic products containing a tetramethylpiperidine moiety, which had been impossible to detect under the previous RTD-GC conditions using a non-polar separation column and conventional flame ionization detection.
Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
Yoshihiko
Y
Taguchi
Hajime
H
Ohtani
Shin
S
Tsuge
Yasuyuki
Y
Ishida
Keiichiro
K
Kimura
Toshio
T
Yoshikawa
D000588:Amines / Q000737:chemistry*; D002849:Chromatography, Gas / Q000379:methods*; D009584:Nitrogen; D011108:Polymers / Q000737:chemistry; D011126:Polypropylenes / Q000032:analysis*; D012680:Sensitivity and Specificity
D000588:Amines; D011108:Polymers; D011126:Polypropylenes; D009584:Nitrogen