甲醛(FA)是存在于许多基质中的高毒性物质,包括淡水以及自然机制,如降雨和有机物质燃烧。消耗受高水平FA污染的水可能会导致严重的短期或长期健康问题。由于这些健康风险,确定和定量水族来源中的FA的程序是必要的。本文报道了使用固定为固体前体的镍(2)-二酮配位化合物对FA进行荧光测定的研究。该化合物的特征在于电子吸收,傅里叶变换红外(FTIR)光谱,X射线衍射(XRD)热重分析(TG),光学显微镜(OM),和扫描电子显微镜(SEM)。该方法基于合成的化合物与氨缓冲液的反应,产生甲醛的选择性试剂:fluoral-P。反应产物生成3,5-二乙酰基-1,4-二氢二甲基吡啶(DDL),负责系统的荧光。几个参数,如温度,加热时间的持续时间,研究了最佳效果的稀释效果,进行了FA测定。在最佳实验条件下,线性响应范围为1.0至10.0mg/LFA(R=0.997,n=10),以及估计为0.129和0.389mg/L的检测(3σ标准)和定量(10σ标准)极限,分别实现了。FA分析能够在05分钟内进行,相对标准偏差估计为1.10%。
Formaldehyde (FA) is a highly toxic substance present in many matrices, including freshwater as well as found in natural mechanisms such as rainfall and combustion of organic matter. Consumption of water contaminated with high levels of FA can cause severe short-term or long-term health problems. Due to these health risks, procedures are necessary to determine and quantify FA in aqua sources This paper reports on a study of fluorimetric determination of FA using a nickel(2 + )-diketonate coordination compound immobilized as a solid precursor. The compound was characterized by electronic absorption, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetry (TG), optical microscopy (OM), and scanner electron microscopy (SEM). The methodology was based on the reaction of the synthesized compound with an ammoniacal buffer generating a selective reagent for formaldehyde: fluoral-P. The product of the reaction generates 3,5-diacetyl-1,4-dihydrolutidine (DDL), which is responsible for the fluorescence of the system. Several parameters such as temperature, duration of heating time, and dilution effect with the best effects were studied to carry out FA determination. Under the optimum experimental conditions, a linear response ranging from 1.0 to 10.0 mg/L FA (R = 0.997 and n = 10), and a detection (3σ criterion) and quantification (10 σ criterion) limit estimated at 0.129 and 0.389 mg/L, respectively were achieved. The FA analysis was able to be conducted in 05 min with a relative standard deviation estimated at 1.10 %.