Determination of copper at wide range concentrations using instrumental features of high-resolution continuum source flame atomic absorption spectrometry

Abstract

This work describes a method to determine Cu at wide range concentrations in a single run without need of further dilutions employing high-resolution continuum source flame atomic absorption spectrometry. Different atomic lines for Cu at 324.754 nm, 327.396 nm, 222.570 nm, 249.215 nm and 224.426 nm were evaluated and main figures of merit established. Absorbance measurements at 324.754 nm, 249.215 nm and 224.426 nm allows the determination of Cu in the 0.07 - 5.0 mg L-1, 5.0 - 100 mg L-1 and 100 - 800 mg L-1 concentration intervals respectively with linear correlation coefficients better than 0.998. Limits of detection were 21 µg L-1, 310 µg L-1 and 1400 µg L-1 for 324.754 nm, 249.215 nm and 224.426 nm, respectively and relative standard deviations (n = 12) were £ 2.7%. The proposed method was applied to water samples spiked with Cu and the results were in agreement at a 95% of confidence level (paired t-test) with those obtained by line-source flame atomic absorption spectrometry.

Colorimetric detection of Cu2+ based on the formation of peptide–copper complexes on silver nanoparticle surfaces

“…Levels of Cu 2+ in Cu 2+ -spiked tap water (2.9 μM) and pond water (3.2 μM) were measured using the designed method and compared with literature values obtained by alternative techniques [ 31 ]. The tested Cu 2+ contents were in a reasonable range relative to the literature data discussed in Table 1 for gold NPs [ 32 ], and also with atomic absorption spectroscopy [ 33 ], and inductively coupled plasma mass spectroscopy [ 34 ].…”

Spectrophotometric Determination of Trace Concentrations of Copper in Waters Using the Chromogenic Reagent 4-Amino-3-Mercapto-6-[2-(2-Thienyl)Vinyl]-1,2,4-Triazin-5(4H)-One: Synthesis, Characterization, and Analytical Applications

“…Comparison of these analytical features with those of previously-published spectrophotometric methods in Table 5 establishes the good sensitivity and wide linear dynamic range of our method. Moreover, the analytical performance of the proposed method, in terms of selectivity, sensitivity, and dynamic concentration range, was compared with a wide variety of analytical techniques [5][6][7][8][9][36][37][38][39]. The spectrophotometric method developed in the present study provides better sensitivity and selectivity than some the methods mentioned in Table 6, without the need to use the extraction or preconcentration methodology.…”

“…However, an increase in the amount of copper in the human body may lead to serious problems such as heart disease, anemia, and liver damage [4].Therefore, the copper concentration in environmental samples-especially water-should be monitored continuously, preferably by simple and effective analytical methods. Many analytical techniques including microwave plasma-AES [5], AAS [6], potentiometry [7,8], voltammetry [9], ICP-OES [10], and ICP-MS [11] have been developed and used to monitor copper concentration levels in a variety of samples. Actually, most AAS and ICP-OES methods recently developed use preconcentration methodology to improve sensitivity and selectivity.…”