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Determination Of Hydrazine Hydrate In Water Using Electrochemiluminescence Of Ru(bpy)3 2+ | 10260
ISSN: 2155-9872
Journal of Analytical & Bioanalytical Techniques
Open Access
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Hydrazine is a man-made chemical and is not found in natural and well waters. However, it should be noted that hydrazine
hydrate is a very common industrial chemicals employed, and hydrazine exhibits intense water absorbability. Being an
efficient chemical treatment, hydrazine is employed to scavenge small amounts of dissolved oxygen that are not removed by
mechanical aeration for high-pressure boilers, due to its advantage over sulfite in not producing any dissolved solids in the boiler
water. Hydrazine is highly toxic and dangerously unstable, especially in the anhydrous form. Hydrazine can damage the liver,
kidneys, and central nervous system. It may also cause steatosis, nausea, pulmonary edema and seizures. In addition, hydrazine
is a probable human carcinogen with a 10
-6
risk level of 10 ng/L in drinking water. Limit tests for hydrazine in pharmaceuticals
suggest that it should be in the low ppm range. It will be a great challenge to develop a simple but reliable detection method
for a rapid and sensitive determination of hydrazine at trace levels in drinking water. Considering of the basic properties and
also the two nitrogen atoms in the structure, hydrazine hydrate was employed to be an amine additive candidate, to build a
Ru(bpy)
3
2+
/hydrazine electrochemiluminescence (ECL) system, and ECL of Ru(bpy)32+ has been employed for the determination
of hydrazine hydrate. The result demonstrated that the logarithmic ECL increasing (ΔECL = ECL
after addition of hydrazine
? ECL
before
addition of hydrazine
) versus the logarithmic concentration of hydrazine hydrate is linear over a concentration range 1.0?10
-9
?1.0?10
-5
mol/L, on both GC and Pt electrodes in a pH 9 phosphate buffer. The hydrazine hydrate detection limit was down to 1.0?10
-9
mol/L, comparatively lower than other detection methods. To check its applicability, the proposed method was applied to the
determination of hydrazine hydrate added into a tap water sample with good reproducibility and stability. All these provide a
possibility to develop a novel ECL detection method for hydrazine in water.
Biography
Fengyu Liu is a teacher of School of Chemistry, Dalian University of technology. She has published more than 20 papers in reputed journals
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