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Evaluation of densitometric quantitation of ether phospholipids by high performance thin layer chromatography

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This paper reports on the use of uni-dimensional high performance thin layer chromatography on silica gel for the separation and detection of ether phospholipids involving in situ reflectance densitometry. Dipping reagents for charring (cupric sulfate-phosphoric acid and manganese chloride-sulfuric acid) or fluorescence enhancement (1-anilino-8-naphthalene sulfonate) were evaluated. Two lipophilic fluorescence reagents (2,5-bis-5′-tert-butylbenzoxazolyl-(2′))thiophene and 4-(N,N-dihexadecyl)amino-7-nitrobenz-2-oxa-1,3-diazole) which move in the mobile phase were tested. The latter reagent gave the more sensitive and stable measurements: nanogram amounts of ether phospholipids could be detected in a reproducible way. Since alkyl lysophospholipids are highly polar molecules, high performance thin layer chromatography is a challenge. Characteristics of sorbents and influence of mobile phases on detection and separation are discussed for the NBD-dihexadecylamine fluorescence detection method.

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Abbreviations

Thio-ALP:

DL-alfa-Phosphatidyl-choline-beita-O-methoxy-methyl-gamma-S-hexadecyl

Et-18-0Me:

DL-alfa-Phosphatidyl-choline-beita-O-methyl-gamma-O-octadecyl

Et-16-0Me:

DL-alfa-Phosphatidyl-choline-beita-O-methyl-gamma-O-hexadecyl

PAF:

DL-alfa-phosphatidyl-choline-beita-acetyl-gamma-O-hexadecyl

PALM:

DL-alfa-phosphatidyl-choline-beita-palmitoyl-gamma-O-hexadecyl

ALP:

Alkyl lysophospholipid

8-ANSA:

1-anilino-8-naphthalene sulfonate

BBOT:

(2,5-bis-(5ø-tert-butylben-zoxazolyl-(2′))thiophene

NBD-dihexadecylamine:

4-(N,N-dihexadecyl)amino-7-nitrobenz-2-oxa-1,3-diazole

TEA:

triethylamine

HPTLC:

High Performance Thin Layer Chromatography

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Coene, I., Ramos, M.E., Van den Eeckhout, E. et al. Evaluation of densitometric quantitation of ether phospholipids by high performance thin layer chromatography. Chromatographia 30, 414–420 (1990). https://doi.org/10.1007/BF02328508

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  • DOI: https://doi.org/10.1007/BF02328508

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