Determination of Triacetone Triperoxide with a N,N-Dimethyl-p-phenylenediamine Sensor on Nafion Using Fe3O4 Magnetic Nanoparticles
Determination of Triacetone Triperoxide with a N,N-Dimethyl-p-phenylenediamine Sensor on Nafion Using Fe3O4 Magnetic Nanoparticles
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DOI：
10.1021/acs.analchem.5b01775
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发表时间：
2015-10-06
影响因子：
7.4
通讯作者：
Apak, Resat
中科院分区：
文献类型：
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作者：
Can, Ziya;Uzer, Aysem;Apak, Resat
爆炸性三过氧化三丙酮（TATP）可以很容易地从容易获得的试剂中制造出来，由于缺乏紫外吸收、荧光或容易电离，因此极难检测。所开发的方法是基于TATP的酸性水解成H2 O2的pH值调节到3.6，并添加磁铁矿纳米粒子（Fe 3 O 4 MNP）的介质中产生羟基自由基从H2 O2，由于过氧化物酶样活性的MNP。所形成的自由基将N，N-二甲基-对苯二胺（DMPD）探针转化为有色的DMPD自由基阳离子，在554 nm的波长下测量其吸光度。该方法对TATP的摩尔吸光系数（ε）为21.06 × 10（3）L mol（-1）cm（-1）。溶液中的DMPD+显色产物可完全保留在阳离子交换膜上，构成TATP的比色传感器，提高了分析灵敏度。所提出的方法对一些手提行李物品没有反应，如洗涤剂、甜味剂、糖、乙酰水杨酸（阿司匹林）和基于对乙酰氨基酚-咖啡因的镇痛药物。另一方面，TATP几乎可以从家用洗涤剂和甜味剂中定量回收，这些洗涤剂和甜味剂可以用作分析物的伪装。普通的土壤和地下水离子（例如，Ca ~（2+）、Mg ~（2+）、K ~+、Cl ~-、SO_（42-）和NO_（3-））的浓度比为100倍时，TNT、RDX和PETN等硝基炸药浓度比为10倍时，均不干扰测定。根据标准GC/MS参考方法对该方法进行了统计学验证。
The explosive triacetone triperoxide (TATP) can be easily manufactured from readily accessible reagents and is extremely difficult to detect, owing to the lack of UV absorbance, fluorescence, or facile ionization. The developed method is based on the acidic hydrolysis of TATP into H2O2 pH adjustment to 3.6, and the addition of magnetite nanoparticles (Fe3O4 MNPs) to the medium to produce hydroxyl radicals from H2O2, owing to the peroxidase-like activity of MNPs. The formed radicals converted the N,N-dimethyl-p-phenylenediamine (DMPD) probe to the colored DMPD radical cation, the optical absorbance of which was measured at a wavelength of 554 nm. The molar absorptivity (epsilon) of the method for TATP was 21.06 x 10(3) L mol(-1) cm(-1). The colored DMPD+ product in solution could be completely retained on a cation-exchanger Nafion membrane, constituting a colorimetric sensor for TATP and increasing the analytical sensitivity. The proposed method did not respond to a number of hand luggage items like detergent, sweetener, sugar, acetylsalicylic acid (aspirin), and paracetamol-caffeine-based analgesic drugs. On the other hand, TATP could be almost quantitatively recovered from a household detergent and sweetener that can be used as camouflage for the analyte. Neither common soil and groundwater ions (e.g., Ca2+, Mg2+, K+, Cl-, SO42-, and NO3-) at 100-fold ratios nor nitro-explosives of trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), and pentaerythritol tetranitrate (PETN) at 10-fold amounts interfered with the proposed assay. The method was statistically validated against the standard GC/MS reference method.