Comments on “Correction” of Inertial Navigation with Loran C on NOAA's P-3 Aircraft”

Leach, B.W.; MacPherson, J. I.

doi:10.1175/1520-0426(1994)011<1048:cooinw>2.0.co;2

Cited by 3 publications

(8 citation statements)

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“…Adsorption enrichment on solid adsorbing materials is a technique commonly used to obtain time-weighted average concentrations. For that, tubes filled with one or more sorbents and SPE cartridges have been employed [25,26].…”

Section: Introductionmentioning

confidence: 99%

Odour‐causing compounds in air samples: Gas–liquid partition coefficients and determination using solid‐phase microextraction and GC with mass spectrometric detection

Godayol

Alonso

Sánchez

et al. 2013

J of Separation Science

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A quantification method based on solid-phase microextraction followed by GC coupled to MS was developed for the determination of gas-liquid partition coefficients and for the air monitoring of a group of odour-causing compounds that had previously been found in wastewater samples including dimethyl disulphide, phenol, indole, skatole, octanal, nonanal, benzothiazole and some terpenes. Using a divinylbenzene/carboxen/polydimethylsiloxane fibre, adsorption kinetics have been studied to define an extraction time that would avoid coating saturation. It was found that for an extraction time of 10 min, external calibration could be performed in the range of 0.4-100 μg/m(3), with detection limits between 0.1 and 20 μg/m(3). Inter-day precision of the developed method was evaluated (n = 5) and RSD values between 12 and 24% were obtained for all compounds. The proposed method has been applied to the analysis of air samples surrounding a wastewater treatment plant in Catalonia (Spain). In all air samples evaluated, dimethyl disulphide, limonene and phenol were detected, and the first two were the compounds that showed the highest partition coefficients.

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Section: Introductionmentioning

confidence: 99%

Odour‐causing compounds in air samples: Gas–liquid partition coefficients and determination using solid‐phase microextraction and GC with mass spectrometric detection

Godayol

Alonso

Sánchez

et al. 2013

J of Separation Science

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“…However, the determination of their gas-liquid partition coefficients indicates the limited partitioning of these compounds to the air surrounding the plants [30]. Therefore, although indole and skatole have previously been detected in air from some sewage treatment plants [8], calculations made taking into account the levels detected in water samples and their calculated partitioning coefficients confirm that air levels well below the LODs are to be expected in the air surrounding the WWTPs.…”

Section: Analysis Of Air Samplesmentioning

confidence: 96%

“…Malodor pollution associated to industrial or animal activities has become an important issue because human tolerance to offensive smells is gradually decreasing [5]. Some VOCs have been related to the perception of odors in environments such as the vicinity of wastewater treatment plants (WWTPs) [6][7][8] or animal facilities [9].…”

Section: Introductionmentioning

confidence: 99%

“…The complexity of these emissions and the low odor threshold limits of many odorous compounds points to the need for highly sensitive analytical techniques for the determination of target VOCs. Sampling and preconcentration have been performed in different ways: active or passive sampling using adsorption tubes followed by thermal desorption (TD)-GC [6][7][8][11][12][13][14][15][16][17][18], grab sampling followed by solid-phase microextraction (SPME) as the preconcentration technique [10,19,20], and other recently developed methodologies such as microsorbent traps [21].…”

Section: Introductionmentioning

confidence: 99%

“…Another method was developed for the determination of VOCs in an urban airborne environment close to a municipal incinerator, a waste collection centre, and a WWTP [8]. Tubes containing Chromosorb-106 were used and a total of 148 VOCs were identified.…”

Section: Introductionmentioning

confidence: 99%

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Development of a method for the monitoring of odor-causing compounds in atmospheres surrounding wastewater treatment plants

et al. 2013

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This study describes the development of an analytical method based on active collection in a multisorbent Tenax TA/Carbograph 1TD tube, followed by thermal desorption and GC-MS for the determination of 16 volatile organic compounds in air samples. The analyzed compounds include ozone precursors and odor-causing compounds belonging to different chemical families (sulfur- and nitrogen-containing compounds, aldehydes, and terpenes). Two types of sorbents were tested and desorption conditions (temperature, time, and sampling, and desorption flow) were evaluated. External calibration was carried out using the multisorbent bed. Method detection limits in the range 0.2-2.0 μg m(-3) for 1 L samples were obtained. The method was applied for determining the target compounds in air samples from two different wastewater treatment plants. Most compounds were detected and toluene, limonene, and nonanal were found in particularly high concentrations with maximum values of 438, 233, and 382 μg m(-3), respectively.

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Improved Wind Measurements on Research Aircraft

Khelif¹,

Burns²,

Friehe³

1999

J. Atmos. Oceanic Technol.

100

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Improved techniques for measuring horizontal and vertical wind components and state variables on research aircraft are presented. They include a filtering method for correcting ground speed and position Inertial Navigation System data with Global Positioning System data, use of moist-air thermodynamic properties in the true airspeed calculation, postflight calculation of the aircraft vertical velocity, and calibration of airflow attack and sideslip angles from the two air-data systems on each aircraft-a radome gust probe and a pair of fuselage-mounted Rosemount 858Y probes. Winds from the two air-data systems are compared for the National Oceanic and Atmospheric Administration WP-3D aircraft.As an evaluation of these techniques, data from the two aircraft during side-by-side low-level constant-heading runs are compared for mean and turbulent measurements of wind, ambient temperature, and absolute humidity. Small empirical offsets were determined and applied to the two latter scalars as well as to static and dynamic pressures. Median differences between mean horizontal wind components from nine comparisons were within 0.1 Ϯ 0.4 m s Ϫ1 . Median differences in latent heat and sensible heat fluxes and momentum flux components were 3.5 Ϯ 15 W m Ϫ2 , 0 Ϯ 2.5 W m Ϫ2 , and 0 Ϯ 0.015 Pa, respectively.

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Comments on “Correction” of Inertial Navigation with Loran C on NOAA's P-3 Aircraft”

Cited by 3 publications

References 0 publications

Odour‐causing compounds in air samples: Gas–liquid partition coefficients and determination using solid‐phase microextraction and GC with mass spectrometric detection

Odour‐causing compounds in air samples: Gas–liquid partition coefficients and determination using solid‐phase microextraction and GC with mass spectrometric detection

Development of a method for the monitoring of odor-causing compounds in atmospheres surrounding wastewater treatment plants

Improved Wind Measurements on Research Aircraft

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