Coated piezoelectric quartz crystal monitor for determination of propylene glycol dinitrate vapor levels

Turnham, B. D.; Yee, Lannie K; Luoma, Greg A.

doi:10.1021/ac00288a026

Cited by 16 publications

(3 citation statements)

References 22 publications

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“…A coated piezoelectric quartz crystal device has been developed for the detection of propylene glycol dinitrate at levels lower than 0.05 ppm in air (69).…”

Section: Estersmentioning

confidence: 99%

Functional group analysis

Smith¹,

Patterson²

1986

Anal. Chem.

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“…A coated piezoelectric quartz crystal device has been developed for the detection of propylene glycol dinitrate at levels lower than 0.05 ppm in air (69).…”

Section: Estersmentioning

confidence: 99%

Functional group analysis

Smith¹,

Patterson²

1986

Anal. Chem.

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“…QCMs are known to provide very sensitive mass measuring devices at nanogram levels, because the resonance frequency changes sharply upon the deposition of a given mass on the electrode. Polymer filmcoated QCMs have been studied as sensors for toxic vapors such as NH3 and S02 in the gas phase (10,11). Natural protein-immobilized QCMs have been reported as immunoassay procedures using antigen-antibody reactions (72-15).…”

mentioning

confidence: 99%

“…Figure11. Typical changes of membrane potentials of the 2C18N+-2C,/PSS~multibilayer film responding to the addition of three consecutive additions of (a) 4.8 X 10"5 M strychnine and (b) 2.0 X 10'4 M /3-ionone at 45 °C.…”

mentioning

confidence: 99%

Synthetic chemoreceptive membranes. Sensing bitter or odorous substances on a synthetic lipid multibilayer film by using quartz-crystal microbalances and electric responses

Okahata¹,

En-na²,

Ebato³

1990

Anal. Chem.

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Specific adsorptions of bitter or odorous substances on a synthetic lipid multibilayer matrix (2C18N+2C1/PSS-) were detected by observing frequency changes of a multibilayer-coated quartz-crystal microbalance (QCM). Partition coefficient (P) and diffusion constants (D) of these substances in the lipid matrix could be obtained quantitatively by using the QCM method. There were good correlations between partition coefficients of various bitter or odor substances to the synthetic multibilayer film on the QCM and the intensity of bitter tastes or olfactory receptions in humans: the stronger the intensity of a bitter substance or odorant, the greater the adsorption on the lipid matrix. This indicates that the lipid-coated QCM acts as a sensitive and selective sensor for bitter taste and odor. Electric responses (changes of membrane potential and membrane resistance) of the 2C18N+2C1/PSS-film occurred consecutively by the adsorption of these substances. The bitter or odor substance showing the stronger intensity induced membrane potential change in lower concentrations. It was found that bitter substances having sterically bulky molecular structures adsorb on the surface of the lipid matrix, and the phase-boundary potential of the membrane is thereby changed. On the contrary, odor substances with relatively small or slender structures can penetrate into the lipid matrix and cause reduction of the membrane resistance (the increase of ion permeability). The selective adsorption behavior of bitter and odor substances by molecular shapes was confirmed by adsorption studies of simple C9-10 hydrophobic alcohols having various molecular structures.

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