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- W2033427265 abstract "A simple method for the determination of polyamines and their N-acetylated forms was developed using benzoyl chloride as derivatization reagent, and 1,6-diaminohexane as internal standard, followed by liquid-liquid extraction with ethyl acetate. The organic extract was injected in a gas chromatograph using a programmed temperature vaporizer and the determination and quantification was performed with a quadrupole mass spectrometer. There was no matrix effect with the proposed method, so internal calibration was used to quantify the corresponding derivatives. Good linear responses were obtained in the range from the limits of detection to 500 µg L−1 (50 µg L−1 for spermidine), with correlation coefficients varying from 0.9591 to 0.9968. The limits of quantification (S/N = 10) ranged 1.0 – 8.3 µg L−1. Recoveries were found between 82 – 117%, showing the good accuracy of the proposed method. Intra- and inter-day precision assays, expressed as relative standard deviation (RSD) were evaluated at two different concentration levels (low and high), showing values in the range of 2.4 – 6.1% and 5.2 – 9.0% for repeatability and reproducibility, respectively (6.9 – 9.7% and 14.1 – 14.6% for spermidine). Successful determination of the studied polyamines and their N-acetylated forms was performed on the saliva of 17 volunteers." @default.
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- W2033427265 date "1990-01-01" @default.
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- W2033427265 title "Investigation of interfering products in the high-performance liquid chromatographic determination of polyamines as benzoyl derivatives" @default.
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- W2033427265 doi "https://doi.org/10.1016/s0021-9673(01)93186-3" @default.
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