Fluorometric determination of hydrazine and ammonia separately or in mixtures

Danielson, Neil D.

doi:10.1016/0039-9140(82)80176-8

Cited by 21 publications

(10 citation statements)

References 11 publications

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“…It has been proposed [108] to determine hydrazine and ammonia as fluorescent derivatives with o phthalic aldehyde. The derivatization reaction in the presence mercaptoethanol leads to the closure of the cycle and formation of 1 (2 hydroxyethyl) thioisoindole.…”

Section: Fluorometrymentioning

confidence: 99%

Spectrophotometric and fluorometric methods for the determination of hydrazine and its methylated analogues

2012

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Section: Fluorometrymentioning

confidence: 99%

Spectrophotometric and fluorometric methods for the determination of hydrazine and its methylated analogues

2012

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“…Danielson and Conroy proposed a fluorometric detection method for hydrazine using o-phthalaldehyde (OPA), which provided a detection limit of 0.1 mg L −1 . 38 Other reagents studied for the direct determination of hydrazine include naphthalene-2,3-dialdehyde, anthracene-2.3-dialdehyde, and 5-chlorosalycilic aldehyde. [39][40][41][42] Among these analytical methods, spectroscopic determination of hydrazine is, arguably, the most common.…”

Section: Introductionmentioning

confidence: 99%

Split-flow Taylor dispersion technique for diffusivity and concentration measurements of hydrazine in aqueous solution

2014

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A sensitive continuous-flow monitoring method is developed for the determination of the diffusion coefficient and concentration of hydrazine in an aqueous solution. The effect of pH on the diffusion coefficient of hydrazine in water was studied at room temperature using the developed split-flow Taylor dispersion technique. The hydrazine calibration curve was linear in the range of 10−1000 ppb and the limit of quantification was 10 ppb. The results showed that the diffusion coefficient of hydrazine does not change significantly over the pH range of 4.01−8.27 but increases in alkaline media of pH greater than 8.27. This method can be used for accurate determination of hydrazine concentration in aqueous flow systems.

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“…The hydrazine in this system is an important reducer and reagent for the determination of successful decontamination in nuclear facilities. Many analytical methods to detect hydrazine have been reported in the literature, such as spectrophotometric [8][9][10], optical [11], potentiometric [12], spectrophotometric flow injection [13], fluorimetric [14,15], and chemiluminescence [16,17], as well as the measurement of gases [18]. Of these techniques, the colorimetric method is considered a simple, rapid and effective method for the detection of hydrazine at low concentrations.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Method for Detection of Hydrazine Decomposition in Chemical Decontamination Process

et al. 2019

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The aim of nuclear facility decommissioning is to make local settlements safe, sustainable and professedly acceptable. The challenges are the clean-up of the nuclear site and waste management. This means a definite promise in terms of safety and security, taking into account social and environmental accountability. There is an essential need to develop safe and efficient methods for nuclear decommissioning. Thus, chemical decontamination technology is of great significance to the decommissioning of nuclear energy facilities. In particular, chemical decontamination technology is applicable to the pipelines and internal loop. The iron-rich oxides, such as Fe3O4 or NiOFe2O3, of a nuclear power plant should have sound decontamination follow-through and should put through a very small amount of secondary waste. It is important to be able to detect and quantify hydrazine in decontamination situations with high sensitivity and selectivity. A colorimetric assay is a technique used to determine the concentration of colored compounds in a solution. However, detecting targeted species rapidly and easily, and with high sensitivity and specificity, is still challenging. Here, the catalytic reaction of oxidants in the p-dimethylaminobenzaldehyde and hydrazine reaction is elucidated. Oxidants can catalyze the reaction of hydrazine and p-dimethylaminobenzaldehyde to form an azine complex such as p-dimethylaminobenzaldazine, with high selectivity and sensitivity within 30 min at ambient temperatures. In the absence of an oxidant such as iron or hydrogen peroxide no detectable colorimetric change was observed by the reaction of p-dimethylaminobenzaldehyde and hydrazine unless an external oxidant was present in the system. In this study, we demonstrated a colorimetric method for the sensitive detection of hydrazine decomposition in the chemical decontamination process. Furthermore, the colorimetric response was easy to monitor with the unaided eye, without any sophisticated instrumentation. This method is thus suitable for on-site detection of contamination in a nuclear facility. In addition, this colorimetric method is convenient, non-invasive, free of complex equipment, and low-cost, making it possible to analyze hydrazine in industrial nuclear facilities. The proposed method was successfully applied to the determination of hydrazine decomposition in the nuclear decontamination process.

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Fluorometric determination of hydrazine and ammonia separately or in mixtures

Cited by 21 publications

References 11 publications

Spectrophotometric and fluorometric methods for the determination of hydrazine and its methylated analogues

Spectrophotometric and fluorometric methods for the determination of hydrazine and its methylated analogues

Split-flow Taylor dispersion technique for diffusivity and concentration measurements of hydrazine in aqueous solution

Colorimetric Method for Detection of Hydrazine Decomposition in Chemical Decontamination Process

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