ELECTROCHEMICAL DETERMINATION OF 2-NAPHTHYLAMINE IN PERFUME SAMPLES USING BORONDOPED DIAMOND ELECTRODE

Rodrigues, Guilherme N.; Silva, Weberson P.; Rocha, Diego P.; Richter, Eduardo M.; Munoz, Rodrigo A. A.; Batista, Alex D.

doi:10.21577/0100-4042.20170491

Guilherme N. Rodrigues

Instituto de Química, Universidade Federal de Uberlândia, 38400-092 Uberlândia - MG, Brasil

Weberson P. Silva

Instituto de Química, Universidade Federal de Uberlândia, 38400-092 Uberlândia - MG, Brasil

Diego P. Rocha

Instituto de Química, Universidade Federal de Uberlândia, 38400-092 Uberlândia - MG, Brasil

Eduardo M. Richter

Instituto de Química, Universidade Federal de Uberlândia, 38400-092 Uberlândia - MG, Brasil

Rodrigo A. A. Munoz

Instituto de Química, Universidade Federal de Uberlândia, 38400-092 Uberlândia - MG, Brasil

Alex D. Batista ^**e-mail: alexbatista@ufu.br

Instituto de Química, Universidade Federal de Uberlândia, 38400-092 Uberlândia - MG, Brasil

https://orcid.org/0000-0002-9617-8094

*e-mail: alexbatista@ufu.br

Figures (5)
Tables (2)

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Figure 1
Cyclic voltammograms obtained before (black line) and after (blue line) the addition of 1 mmol L^-1 of 2NAP in 0.1 mol L^-1 borate buffer (pH = 10.0) with 20% (v/v) ethanol: (A) BDD electrode (area = 0.13 cm²); (B) GCE (area = 0.07 cm²). Scan rate: 50 mV s^-1; step potential: 5 mV

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Figure 2
(A) Baseline-corrected DPV recordings obtained with increasing concentrations of 2NAP (0.5 - 105 µmol L^-1) and (B) respective analytical curve (r = 0.999). Modulation amplitude: 70 mV; modulation time: 20 ms; step potential: 6 mV. Supporting electrolyte: 0.1 mol L^-1 borate buffer (pH = 10.0) with 20% (v/v) ethanol

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Figure 3
Intra-day repeatability study obtained by DPV from successive measurements (n = 10) of solutions containing 0.5, 2.0 and 5.0 µmol L^-1 of 2NAP. Other experimental conditions as indicated in

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Figure 4
Baseline-corrected DPV recordings obtained for two perfume samples (A and C) before and after spiked with 40 µmol L^-1 (100-fold dilution in supporting electrolyte) and addition of increasing concentrations of 2NAP (2 µmol L^-1). (B and D) Respective analytical curves using the standard addition method (r = 0.998 and 0.99, respectively). Other experimental conditions as indicated in

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Figure 5
Baseline corrected DPV recordings obtained before (black line) and after (blue line) the addition of 2.0 µmol L^-1 of 2NAP in 0.1 mol L^-1 borate buffer (pH = 10.0) and, finally, after addition 8.94 mmol L^-1 of ethylene glycol (A; red line) or 6.84 mmol L^-1 of glycerol (B; red line). Other experimental conditions as indicated in

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Table 1
Studied ranges and selected optimized values for the determination of 2NAP by DPV

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Table 2
Comparison of the analytical characteristics of the proposed method with previous methods for determination of 2NAP

Parameters	Studied range	Optimized value
Modulation amplitude / mV	10-100	70
Modulation time / ms	10-50	20
Step potential / mV	1-10	6

Techniques	Samples	LOD (nmol L^-1)	RSD (%)	Comments	Ref.
GC-MS/MS	Urine	8.3 x 10^-5	7.1	Solid-phase microextraction fiber coated with a two-dimensional porous organic framework	24
HPLC-ED	Hair Dye	705	-	Use of ionic liquid as novel medium for improvement of separation and quantization of 16 aromatic amines	25
GC-MS	Textiles	0,51	2	Microextraction by packed sorbent and salting-out-assisted liquid–liquid extraction	26
Voltammetry	River Water	13.9	4.4	Use of bare glassy carbon electrode	27
Voltammetry	-	0.2 – 2.6	3 – 5	Carbon paste electrodes modified with monomeric α-, β- or γ-cyclodextrin and carbon-based screen-printed electrodes surface-modified with a thin film of β-cyclodextrin or carboxymethylated β-cyclodextrin	28
HPLC/AD	Food Dye	60	4.5	Separation using high performance liquid chromatography with amperometric detection at a BDD film electrode	12
Voltammetry	Water	4.5	4.28	3,4,9,10-perylene tetracarboxylic acid noncovalently modified multiwalled carbon nanotubes	13
Potenciometry	Water	2000	9.4	DNA-modified carbon paste electrode	29
Voltammetry	Water	14	5.0	Single walled carbon nanotubess and gold nanoparticles nanocomposite	1
HPLC/AD	Water	8.8	3.9	Electrochemical detection using carbon paste electrode	14
Voltammetry	Perfume	4.6	2.9	Direct detection after sample dilution	This work

[1] *e-mail: alexbatista@ufu.br