技术
HPLC: suitable
试验参数
column: Ascentis Express RP-Amide, 10 cm x 3 mm I.D., 2.7 μm particles (53918-U)
mobile phase: [A] water; [B] methanol; (60:40, A:B)
flow rate: 0.6 mL/min
pressure: 2900 psi (200 bar)
column temp.: 50 °C
detector: UV, 250 nm
injection: 1 μL
sample: methyl-, benzylparaben (50 mg/L), ethylparaben (30 mg/L), propyl-, butylparaben (100 mg/L), 2-phenoxyethanol (1.5 g/L),1-phenoxy-2-propanol (3 g/L), all in 40% methanol
适用性
application for HPLC
应用
cleaning products
cosmetics
personal care
分析说明
With the publication Borremans, M. et.al. 2004, Chromatographia 59: 47-53 as a reference, this method is 10% faster, but with superior resolution of critical pairs; in this case, the minimum USP resolution is 2.4.
法律信息
Ascentis is a registered trademark of Merck KGaA, Darmstadt, Germany
分析物
说明
Ethylene glycol monophenyl ether
1-Phenoxy-2-propanol
Methyl 4-hydroxybenzoate
Ethyl 4-hydroxybenzoate
Butylparaben
Benzyl 4-hydroxybenzoate
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