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- W2386351722 abstract "The contents of trace impurity 4-Carboxybenzaldeh yd e(4-CBA)? p -Toluic acid( p -TOL) and Benzoic acid(C-7H-6O-2) in tere phthalic acid by high performance liquid chromatography(HPLC) were determined. A Shim-Pack WAX -1 column was used with the mobile phase of 0.1 mol/L NH-3H-2PO-4+6 % CH-3O H(pH 4.5) and the detection wavelength was 254 nm. The trace impurity calibratio n curves had good linearity in range of 0.59～235.20 mg/kg?4.52～392.00 mg/kg和0 .28～24.55 mg/kg and the correlation coefficients were 0.999 8?0.999 7 and 0.99 9 9 for 4-CBA? p -TOL and C-7H-6O-2 respectively, the average recovery b enzoic acid added was 99.03 % (n=6) and RSD was 0.37 %." @default.
- W2386351722 created "2016-06-24" @default.
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- W2386351722 date "2003-01-01" @default.
- W2386351722 modified "2023-09-25" @default.
- W2386351722 title "Determination of Trace Impurity in Terephthalic Acid by High Performance Liquid Chromatography" @default.
- W2386351722 hasPublicationYear "2003" @default.
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