Naranjo Rodríguez I, Muñoz Leyva J A, Hidalgo Hidalgo de Cisneros J L
Talanta. 1996 Jul;43(7):1117-24. doi: 10.1016/0039-9140(96)01873-5.
A study of the electrochemical behavior of acrolein at a dropping mercury electrode using different polarographic techniques is described. Theoretical studies of the reversibility of the wave of acrolein were carried out using two different polarographic techniques: direct current tast and differential pulse. Differential pulse polarography may be used to determine acrolein concentration in a Britton-Robinson buffer solution of pH 10 in the ranges 2 x 10(-7)10(-8) and 5 x 10(-8)-10(-4) mol dm(-3) and a coefficient of variation of 1.7% for a concentration of 10(-5)mol dm(-3). A flow injection method with amperometric detection at a potential of -1.4V using a mercury electrode is also described. Before each injection, any drop hanging from the tip of the capillary needs to be dislodged and a new electrode drop dispensed; three different drop sizes were tested. A linear relationship between peak intensity and acrolein concentration was obtained in the range 10(-5)-10(-7) mol dm(-3), with a detection limit of 9.8 x 10(-8) mol dm(-) 3 and a coefficient of variation of 2.9% for a 2 x 10(-7) mol dm(-3) concentration. Several organic and inorganic species were tested in order to ascertain whether they interfered with the signal for acrolein. The proposed methods were applied to the determination of acrolein in seawater samples.
描述了一项使用不同极谱技术研究丙烯醛在滴汞电极上的电化学行为的研究。使用两种不同的极谱技术对丙烯醛波的可逆性进行了理论研究：直流极谱法和微分脉冲法。微分脉冲极谱法可用于测定pH值为10的Britton-Robinson缓冲溶液中丙烯醛的浓度，浓度范围为2×10⁻⁷ - 10⁻⁸和5×10⁻⁸ - 10⁻⁴mol dm⁻³，对于10⁻⁵mol dm⁻³的浓度，变异系数为1.7%。还描述了一种使用汞电极在-1.4V电位下进行安培检测的流动注射法。每次进样前，需要去除毛细管尖端悬挂的任何液滴，并分配一个新的电极液滴；测试了三种不同的液滴大小。在10⁻⁵ - 10⁻⁷mol dm⁻³范围内获得了峰强度与丙烯醛浓度之间的线性关系，检测限为9.8×10⁻⁸mol dm⁻³，对于2×10⁻⁷mol dm⁻³的浓度，变异系数为2.9%。测试了几种有机和无机物种，以确定它们是否干扰丙烯醛的信号。所提出的方法应用于海水样品中丙烯醛的测定。
