Saltzman method for determination of low concentrations of oxides of nitrogen in automotive exhaust

Fisher, G E; Becknell, D. E.

doi:10.1021/ac60312a042

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…Prior to 1973, nitrogen oxides (NOx) in cigarette smoke were almost universally determined by the Saltzman procedure or a modification thereof (1)(2)(3)(4). A few procedures involved other color forming reagents (5-7) but almost all required nitric oxide (NO) oxidation to nitrogen dioxide (N0 2 ) and absorption in solution before measurement.…”

Section: Introductionmentioning

confidence: 99%

The Determination of Nitric Oxide in Gas Phase Cigarette Smoke by Non-dispersive Infrared Analysis

Williams¹

1980

Beiträge Zur Tabakforschung / Contributions to Tobacco Research

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Nitric oxide in cigarette smoke was conveniently determined by non-dispersive infrared analysis (NDIR). Recoveries of 95 % were obtained with standard gas-air mixtures but recoveries from smoke increased from 87% for high-yield to 91 % for low-yield cigarettes. Relative error was about 4 %. A reduction in the dead volume of Cambridge filter cassettes, to reduce the amount of NO reacted between puffs, increased NO deliveries of cigarettes by 4%. Deliveries of NO were estimated to average 4 % lower due to oxidation, but reaction with other smoke components reduced them further depending upon concentrations. The NO deliveries of cigarettes increased as blend nitrate increased and as the flow of air around cigarettes decreased. Nitric oxide in smoke and in standard gas-air mixtures, determined by non-dispersive infrared (NDIR) spectroscopy, was substantiated by an automated colorimetric analysis. Interfering smoke species were determined and circumvented in both methods.

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Section: Introductionmentioning

confidence: 99%

The Determination of Nitric Oxide in Gas Phase Cigarette Smoke by Non-dispersive Infrared Analysis

Williams¹

1980

Beiträge Zur Tabakforschung / Contributions to Tobacco Research

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“…This reaction is extremely specific toward NO 2 and is in common use in analytical chemistry. In this field, it has been successfully used to monitor from 5 ppb to 300 ppm of NO 2 , by bubbling the sample through the Saltzman reagent. , After exposing the reagent to the gas sample, the concentration of NO 2 ions is determined by analyzing the absorption spectra of the products using bulky and costly UV–visible spectrometers. This wet methodology is complex, requires trained personnel, and cannot be carried out in the field or in an automated way with inexpensive means.…”

mentioning

confidence: 99%

“…In this field, it has been successfully used to monitor from 5 ppb to 300 ppm of NO 2 , by bubbling the sample through the Saltzman reagent. 11,12 After exposing the reagent to the gas sample, the concentration of NO 2 ions is determined by analyzing the absorption spectra of the products using bulky and costly UV−visible spectrometers. This wet methodology is complex, requires trained personnel, and cannot be carried out in the field or in an automated way with inexpensive means.…”

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confidence: 99%

Highly Specific and Wide Range NO₂ Sensor with Color Readout

et al. 2017

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We present a simple and inexpensive method to implement a Griess-Saltzman-type reaction that combines the advantages of the liquid phase method (high specificity and fast response time) with the benefits of a solid implementation (easy to handle). We demonstrate that the measurements can be carried out using conventional RGB sensors; circumventing all the limitations around the measurement of the samples with spectrometers. We also present a method to optimize the measurement protocol and target a specific range of NO concentrations. We demonstrate that it is possible to measure the concentration of NO from 50 ppb to 300 ppm with high specificity and without modifying the Griess-Saltzman reagent.

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Reaction of NO with hypochlorous acid

Ghibaudi

Barker

Benson

1979

Int J of Chemical Kinetics

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The reaction between NO(g) a t concentrations between 0.1 and 1.0 Torr in I-atm N2 and aqueous solutions of NaClO has been studied over the pH range of 6-12 and hypochlorite concentrations between 0.01 and 1.OM. A very rapid and efficient reaction occurs leading to the production of about 30?&-40% of the NO as NO2 and with conversions of NO up to 98% at about I-sec contact time. It is shown that a fast chain reaction initiated by the endothermic step NO(aq) + HOCl(aq) &HONO(aq) + Cl (aq) can account for the data. The very exothermic reaction NO + CIO--NO2 + Cl-is shown to be a t least 30-fold slower than i. The overall reaction seems very promising as a method of reducing NO and NO2 emissions from the exhausts of industrial plants.

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Saltzman method for determination of low concentrations of oxides of nitrogen in automotive exhaust

Abstract: The analysis of ambient air for N02 concentrations of 1 ppm and below was originally reported by Saltzman in 1954 (1). Since that time the method has been applied to the analysis 15 53 53

Cited by 5 publications

References 14 publications

The Determination of Nitric Oxide in Gas Phase Cigarette Smoke by Non-dispersive Infrared Analysis

The Determination of Nitric Oxide in Gas Phase Cigarette Smoke by Non-dispersive Infrared Analysis

Highly Specific and Wide Range NO₂ Sensor with Color Readout

Reaction of NO with hypochlorous acid

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Saltzman method for determination of low concentrations of oxides of nitrogen in automotive exhaust

Abstract: The analysis of ambient air for N02 concentrations of 1 ppm and below was originally reported by Saltzman in 1954 (1). Since that time the method has been applied to the analysis 15 53 53

Cited by 5 publications

References 14 publications

The Determination of Nitric Oxide in Gas Phase Cigarette Smoke by Non-dispersive Infrared Analysis

The Determination of Nitric Oxide in Gas Phase Cigarette Smoke by Non-dispersive Infrared Analysis

Highly Specific and Wide Range NO2 Sensor with Color Readout

Reaction of NO with hypochlorous acid

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Highly Specific and Wide Range NO₂ Sensor with Color Readout