Spectrophotometric determination of chlorate ion

Trautwein, Norman L.; Guyon, John C.

doi:10.1016/s0003-2670(01)80396-2

Cited by 8 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simpler spectrophotometric methods for chlorate detection are, in theory, amenable for field use. These methods are generally based on bleaching the color of a dye species [6,[11][12][13][14] or the catalyzed generation of colored triiodide anion [15][16][17][18] in the presence of chlorate. The color change may be visible to the naked eye or with the aid of very simple instrumentation, permitting development of a lightweight system that requires little or no power to operate.…”

Section: Introductionmentioning

confidence: 99%

Statistical evaluation of an electrochemical probe for the detection of chlorate

Trammell

Shriver‐Lake

Dressick

2017

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

We describe the use and characterization of a multilayer film, prepared via layer-by-layer deposition of cationic para-rosaniline acetate dye (i.e., PR) and the vanadium-containing Keggintype polyoxometalate anion, [PMo 11 VO 40 ] 5 (i.e., PVMo 11 ), on indium tin oxide (ITO) as an electrode for determination of chlorate. A linear cyclic voltammetry (CV) current response was observed for the 0 M  [ClO 3  ]  1000 M range with a detection limit of ~220 M ClO 3  (S/N > 3) in a pH = 2.5 solution of 100 mM sodium acetate. Electrode response was insensitive to interference by oxygen and nitrogen-based explosives like TNT, a prerequisite for use in the field. A Taguchi L16 array was used to investigate the performance of the electrode as functions of number of PVMo 11 /PR bilayers (L; 3-6 bilayers), solution pH (H; pH ~1.32 -2.85), solution [ClO 3  ] (C; 250 -1000 M), CV scan rate (S; 50-200 mVs 1 ), and film age (A; 1-8 weeks). Maximum current response was obtained for a 1 week old 5 bilayer film immersed in a pH 2.85 0.10 M NaCl (aq) solution containing 1000 M ClO 3  . However, current response fell as films aged, requiring aging of films for approximately 8 weeks prior to use to obtain reproducible analyses. A two-level full factorial design using films aged 8 weeks identified the variables S, L, H, and C and variable interactions LS and HS as statistically significant contributors to the film current response and provided a model describing film performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Statistical evaluation of an electrochemical probe for the detection of chlorate

Trammell

Shriver‐Lake

Dressick

2017

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

show abstract

“…Spectrophotometric methods for chlorate detection are currently amenable for field use. These methods are generally based on bleaching the color of a dye species [ 10 , 11 , 12 , 13 , 14 ] in the presence of chlorate and form the concept of commercial test kits. The color change may be visible to the naked eye or with the aid of very simple instrumentation, permitting development of a lightweight system that requires little or no power to operate.…”

Section: Introductionmentioning

confidence: 99%

Paper-Based Electrochemical Detection of Chlorate

Shriver‐Lake

Zabetakis

Dressick

et al. 2018

Sensors

View full text Add to dashboard Cite

We describe the use of a paper-based probe impregnated with a vanadium-containing polyoxometalate anion, [PMo11VO40]5−, on screen-printed carbon electrodes for the electrochemical determination of chlorate. Cyclic voltammetry (CV) and chronocoulometry were used to characterize the ClO3− response in a pH = 2.5 solution of 100 mM sodium acetate. A linear CV current response was observed between 0.156 and 1.25 mg/mL with a detection limit of 0.083 mg/mL (S/N > 3). This performance was reproducible using [PMo11VO40]5−-impregnated filter paper stored under ambient conditions for as long as 8 months prior to use. At high concentration of chlorate, an additional catalytic cathodic peak was seen in the reverse scan of the CVs, which was digitally simulated using a simple model. For chronocoulometry, the charge measured after 5 min gave a linear response from 0.625 to 2.5 mg/mL with a detection limit of 0.31 mg/mL (S/N > 3). In addition, the slope of charge vs. time also gave a linear response. In this case the linear range was from 0.312 to 2.5 mg/mL with a detection limit of 0.15 mg/mL (S/N > 3). Simple assays were conducted using three types of soil, and recovery measurements reported.

show abstract

“…Numerous oxidant-anions (CIO3-, IO4-, NO2-) and oxidant-cations in addition to Ce(IV), V(V), and hydrogen peroxide have been determined indirectly by reactions with an acidic iodide solution in the presence of a triphenylmethane dye such as brilliant green or crystal violet (476). Spectrophotometric methods for the determination of selenium and tellurium have been reviewed (593). In application of the heteropoly blue method for the determination of phosphorus, a variety of preliminary treatments have been employed to circumvent interferences.…”

mentioning

confidence: 99%