Determination of organic matter and organic matter to organic carbon ratios by infrared spectroscopy with application to selected sites in the IMPROVE network

Ruthenburg, Travis C.; Perlin, Pesach C.; Liu, Victor; McDade, Charles E.; Dillner, Ann M.

doi:10.1016/j.atmosenv.2013.12.034

Cited by 76 publications

(172 citation statements)

References 49 publications

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“…Russell et al () used this method to analyze filter samples from the Texas Air Quality Study and Gulf of Mexico Atmospheric Composition and Climate Study and found an average R oc of 1.8 ± 0.14. Ruthenburg et al () used FTIR analysis on 1 year of IMPROVE Teflon filters at seven sites to estimate OMC. From this work they found that the median R oc was 1.69, with the 10th and 90th percentiles being 1.46 and 2.01, respectively.…”

Section: Estimating Organic Mass To Oc Ratiosmentioning

confidence: 99%

Implications of Organic Mass to Carbon Ratios Increasing Over Time in the Rural United States

et al. 2020

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The thermal evolution procedure used by most monitoring programs in the United States to determine carbonaceous aerosol concentrations is referred to as the thermal‐optical reflectance method, where an aerosol sample that has been collected on a quartz filter is heated and evolved carbon is characterized as either organic (OC) or light absorbing carbon (LAC). Evolved carbon assigned to OC is multiplied by a factor, Roc, to achieve an estimate of organic mass. Over the last 10–15 years, Roc, estimated through multiple linear regression analysis of data collected in the Interagency Monitoring of Protected Visual Environments (IMPROVE) program, has increased at about a rate of about 0.02 per year, reaching values above 2.0 in many regions of the United States. Analysis of evolved carbon concentration temporal trends suggests that thermal‐optical reflectance analysis, on the average, inaccurately bifurcates particulate carbon into the OC and LAC fractions with some LAC being inadvertently and wrongly assigned to the OC fraction. It is shown that misapportioned LAC assigned to OC is decreasing faster than true OC, resulting in a compensating increase in the Roc assigned to reported OC over time. A first‐order model is proposed to correct for the misapportioned carbon.

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Section: Estimating Organic Mass To Oc Ratiosmentioning

confidence: 99%

Implications of Organic Mass to Carbon Ratios Increasing Over Time in the Rural United States

et al. 2020

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“…4.6). MIR spectroscopy has been widely applied in the study of various areas [45][46][47][48][49][50], including chemical researches, food safety, environmental monitoring, materials, etc. However it becomes of limited use for structural investigation of inorganic compounds, such as metal oxides or salts, which are inactive in the MIR region.…”

Section: The Introduction Of Far-infrared Spectroscopy (Fir)mentioning

confidence: 99%

Differentiation of the Coordination Chemistry of Metal Chlorides in Catalytic Conversion of Glucose in Ionic Liquids

Zhang

2016

Green Chemistry and Sustainable Technology

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Catalytic aldose isomerization to ketose is an important reaction for the utilization of cellulosic biomass. However, a fundamental understanding and knowledge base involved in this reaction remains lacking in the literature. In this chapter, we provide a focused review of the most studied solvent-based catalytic system involving metal halides for glucose isomerization to fructose and further to 5-hydroxymethhylfurfral (5-HMF). Results from studies by different physical techniques are critically reviewed. A differentiation of the coordination chemistry of different metal chlorides obtained by various physical techniques is established to rationalize the drastically different catalytic pathways by the metal chloride catalysts. The performance of metal chloride catalysts for the isomerization of aldose to ketose is found to correlate with their coordination chemistry. Solvents play an important role in determining the coordination structures for the metal ions, which critically affect the catalysis of the metal chloride precursors. Undesired side products are related to the reaction pathways corresponding to the nature of the coordination of metal ions with different oxygen sources in the substrates and the products.

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“…A comprehensive interpretation of FTIR spectra has been tabulated in Aliphatic carboxylic acids (OH) and Amino acids/Amines (OH) [12] 3500 -2500 Carbohydrates (C-OH) [12] 3500 -3100 Organic hydroxyl (C-OH) [19] 3440 -3400 Hydroxyl (-OH) [30] 3400 -2500 Carboxylic acid (OH) [45] 3400-2400 Carboxylic acid (OH stretch) [24] [ 44] 3400, 1440 -1220, 1260 -1000 Alcohol and phenol [44] 3400, 1625 Amine (NH 2 ) [19] [20] 3400 OH stretching of phenol hydroxyl and carboxyl [5] 3382 -3323 Alcohol (OH) [45] 3380 H-bonding of hydroxyl [46] 3350, 1350, 650 ± 50 Alcohols/Phenols (OH) [12] 3350 -3205 Alcohol COH [24] 3350, 3180 Primary amide N-H stretch [44] 3300 -3150 Alcohol groups [33] 3300 -2900 C-H stretching in alkane, alkene, alkyne, aromatic [44] 3300 Secondary amide N-H stretch [44] 3300 Hydrogen bonded [8] 3200 -3000, 1290 -1000 Aromatic carbon (Arom-H) [38] G. 3200 -3000 Aromatic carbons (Arom-H) [36] 3130 -3030, 900 -670 Aromatic (C=C-H) [48] 3100 -3070 Carboxylic acid (COOH) [30] 3100 -3000 Aromatic (C-H) [42] 3100 -2900 Unsaturated aliphatic (C=C-H) [17] [19] [20] 3100 -3000 Alkene (C-H) [38] 3100 -3000 Aromatic (C=C-H) [17] [19] [20] 3100 -3000 Unsaturated aliphatic (C=C-H) [48] 3100 -3000 Unsaturated and aromatic (C-H) [12] 3100 H-bonding of organic acid [46] 3100 -2900 Alkane groups [33] 3090 -3075, 3050 -3000, 990 -815 Aliphatic Hydrocarbons (C-H) [12] 3050 Aromatic (C-H) [24] [ …”

Section: Ftir Spectral Interpretations For Characteristic Groups In Omentioning

confidence: 99%

Applications of Infrared Spectroscopy in Analysis of Organic Aerosols

Cao¹,

Yan²,

Zou³

et al. 2018

SAR

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This paper reviews the studies of using FTIR to investigate the components of aerosols produced in smog chamber experiments and collected in atmosphere. The fact that aerosols are mixture of small amount of countless individual compounds makes the analysis of aerosol constituents very challenging. Although a number of advanced instruments have been applied to the chemical characterization of aerosol components, the majority of aerosol components, particularly the organics, remain unknown. Being supplemental to the traditional quantitative instruments, FTIR has been recently used either individually or combining with other analytical instruments to characterize the components of aerosol particles. This paper aims to show how FTIR is applied to analysis of organic aerosols in current literature and to summarize the FTIR characteristic peak frequencies that are widely seen in the FTIR measurement of organic aerosols. It will be greatly helpful to researchers whose studies are focused on the analysis of aerosol components.

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Determination of organic matter and organic matter to organic carbon ratios by infrared spectroscopy with application to selected sites in the IMPROVE network

Cited by 76 publications

References 49 publications

Implications of Organic Mass to Carbon Ratios Increasing Over Time in the Rural United States

Implications of Organic Mass to Carbon Ratios Increasing Over Time in the Rural United States

Differentiation of the Coordination Chemistry of Metal Chlorides in Catalytic Conversion of Glucose in Ionic Liquids

Applications of Infrared Spectroscopy in Analysis of Organic Aerosols

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