FTIR-evolved gas analysis in recent thermoanalytical investigations

Risoluti, Roberta; Fabiano, Maria Aurora; Gullifa, Giuseppina; Ciprioti, Stefano Vecchio; Materazzi, Stefano

doi:10.1080/05704928.2016.1207658

Cited by 47 publications

(23 citation statements)

References 308 publications

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“…From the TGA of the coconut shell extract (refer to Figure 5(e)), it is found to be similar to that reported for the fire retardant bark sample [46]. The TGA of CSE is almost identical, and evolution of CO 2 and water are detected in the TG-coupled FTIR spectra of the volatiles of the bark [46]. It is also seen from reported TGA of xylan and lignin in comparison with cellulose [41,47] that CSE seems to contain a water-soluble xylan-lignin component of the green coconut shell [48].…”

Section: Attenuated Total Reflection Fourier Transform Infrared Analysupporting

confidence: 77%

“…In this case, fire retardancy seems to have been achieved by decreasing volatilization of the cellulosic polymer causing char formation, which in turn acts as a protective layer against the heat of the flame and against diffusion of combustible volatile compounds to the flame. From the TGA of the coconut shell extract (refer to Figure 5(e)), it is found to be similar to that reported for the fire retardant bark sample [46]. The TGA of CSE is almost identical, and evolution of CO 2 and water are detected in the TG-coupled FTIR spectra of the volatiles of the bark [46].…”

Section: Attenuated Total Reflection Fourier Transform Infrared Analysupporting

confidence: 74%

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Development of thermally stable and hygienic colored cotton fabric made by treatment with natural coconut shell extract

Teli

Pandit

2017

Journal of Industrial Textiles

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As far as the value addition of textile is concerned, flame retardancy of textile materials is considered to be one of the most important properties in textile finishing by both industries as well as academic researchers. Flame-retardant property with thermal stability was imparted to cotton by using green coconut (Cocos nucifera Linn) shell extract, a natural waste source of coconut. Coconut shell extract was analyzed by high-performance liquid chromatography, Fourier transform infrared spectroscopy, energy-dispersive spectrometry and its phytochemical analysis was also carried out. The coconut shell extract (acidic after extraction) was applied in three different pH (acidic, neutral, and alkaline) conditions to the cotton fabric. Flame-retardant properties of the untreated and the treated cotton fabrics were analyzed by limiting oxygen index and vertical flammability. The study showed that all the treated fabrics had good flame resistance property compared to that of the untreated fabric. The limiting oxygen index value was found to increase by 72.2% after application of the coconut shell extract from alkaline pH. Pyrolysis and char formation behavior of the concerned fabrics were studied using thermogravimetric analysis and differential scanning calorimetric analysis in a nitrogen atmosphere. The physicochemical composition of the untreated and coconut shell extract treated cotton fabrics were analyzed by attenuated total reflection-Fourier transform infrared, scanning electron microscope, and energy-dispersive X-ray spectroscopy. Also, treated cotton fabric showed natural brown color and antibacterial

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Section: Attenuated Total Reflection Fourier Transform Infrared Analysupporting

confidence: 77%

Section: Attenuated Total Reflection Fourier Transform Infrared Analysupporting

confidence: 74%

Development of thermally stable and hygienic colored cotton fabric made by treatment with natural coconut shell extract

Teli

Pandit

2017

Journal of Industrial Textiles

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“…Thermogravimetric techniques have been largely applied to complex matrix as analytical tool that does not require sample pretreatment nor clean-up (Toth et al, 2010;Fonseca et al, 2012;Materazzi et al, 2015Materazzi et al, , 2017aPapadopoulos et al, 2016;Risoluti et al, 2016bRisoluti et al, , 2017Bach and Chen, 2017;Catauro et al, 2018) and permits to rapidly obtain both qualitative and quantitative outcomes (Skreiberg et al, 2011;Materazzi et al, 2014a,b;Napoli et al, 2014;Shan-Yang et al, 2015;Marcilla et al, 2017). Recently, a novel approach based on the association of thermogravimetric analysis (TGA) and chemometrics has been proposed in different fields (Pappa et al, 2003;Khanmohammadi et al, 2012;Caramés-Alfaya et al, 2013;Chauhan et al, 2020), including the investigation of biological samples for clinical analysis (Risoluti et al, 2016a(Risoluti et al, , 2018aMaterazzi et al, 2017a).…”

Section: Introductionmentioning

confidence: 99%

An Innovative Multilevel Test for Hemoglobinopathies: TGA/Chemometrics Simultaneously Identifies and Classifies Sickle Cell Disease From Thalassemia

Risoluti

Caprari

Gullifa

et al. 2020

Front. Mol. Biosci.

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Introduction: Hemoglobinopathies are the most common genetic disorder wordlwide and because of migrations are become an emerging global health problem. Screening programmes for Sickle cell disease and Thalassemia have been implemented in some countries, but are not a common practice, due to a lack in the accuracy of the methods and to the costs of the analyses. Objectives: The objective of this study was the application of the thermogravimetry coupled to chemometrics as new screening method to perform an early diagnosis of thalassemia and sickle cell disease. Methods: Whole blood samples (30 µL) from sickle cell anemia and thalassemia patients were analyzed using the thermobalance TG7 and the resulting curves were compared with those of healthy individuals. A chemometric approach based on Principal Components Analysis (PCA) was exploited to enhance correlation between thermogravimetric profiles and a model of prediction by Partial Least Square Discriminant Analysis (PLS-DA) was developed and validated. Results: The characteristic profile of the blood sample thermal decomposition and the first derivative of the TG curve showed that patients were clearly distinguished from healthy individuals as a result of different amounts of water and corpuscular fraction of blood. The chemometric approach based on PCA allowed a quick identification of differences between healthy subjects and patients and also between thalassemic and sickle cell anemia subjects. Chemometric tools (PLS-DA) were used to validate a model of prediction to process the thermogravimetric curves and to obtain in 1 h an accurate diagnosis. The TGA/Chemometric test permitted to perform first level test for hemoglobinopathies with the same accuracy of confirmatory analyses obtained by the molecular investigation. Conclusions: A screening test based on the coupling of thermogravimetry and chemometrics was optimized for the differential diagnosis of hemoglobinopathies. The novel test is able to simultaneously perform a simple and fast diagnosis of sickle cell Risoluti et al. Innovative Multilevel Test for Hemoglobinopathies anemia or thalassemia, in a single analysis of few microliters of non-pretreated whole blood at low cost, and with high accuracy. Moreover this method results particularly suitable in pediatric patients as it requires small sample volumes and is able to characterize also transfused patients.

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“…Further heating leads to the evolution of volatile products due to a thermal decomposition of organic ligand. At about 336 • C, the FTIR spectra show bands that might correspond to carbon disulfide (CS 2 ) (1550-1450 cm −1 , ν C=S ), carbonyl sulfide (COS) (2100-2000 cm −1 , ν C=O ), acetic acid (1800-1700 cm −1 , ν C=O ), and p-xylene (3150−2800, 1550−1450, 1150−1050, and 850−750 cm −1 ) ( Figures S3 and S4) [28][29][30]. The FTIR spectrum of this hydrocarbon is characterized by the bands at 3121, 3060, and 2875 cm −1 derived from the stretching vibrations of CH 3 and C Ar −H groups of p-substituted benzene rings.…”

Section: Tg-ftir Analysismentioning

confidence: 99%

Bringing a New Flexible Mercaptoacetic Acid Linker to the Design of Coordination Polymers

Ostasz

Kirillov

2020

Polymers

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Two new 3D coordination polymers (CPs), formulated as [Zn(p-XBT)]n (1H) and [Cd(p-XBT)]n (2H), were assembled from a virtually unexplored p-xylylene-bis(2-mercaptoacetic) acid linker (p-XBTA) and characterized by infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), thermal analysis methods (TG-DSC, TG-FTIR), single-crystal X-ray diffraction, and topological analysis. Two different synthetic strategies were explored, namely the precipitation (P) and hydrothermal (H) methods, resulting in a Zn(II) derivative [Zn(p-XBT)·H2O]n (1P) and its dehydrated analogue [Zn(p-XBT)]n (1H), respectively. In the Cd(II)-containing system, the same [Cd(p-XBT)]n (2P = 2H) products were generated by both synthetic methods. Upon dehydration, 1P undergoes a “crystal-to-crystal” phase transition in the 170−185 °C temperature range, producing an anhydrous polycrystalline sample (1H). Both CPs 1H and 2H are isostructural and feature polymeric 3D metal-organic nets of the cds topological type, which are driven by the 4-linked metal and p-XBT2− nodes. These compounds represent unique examples of coordination polymers derived from p-xylylene-bis(2-mercaptoacetic) acid, thus opening up the use of this flexible S,O-heterodonor building block in the design of polymeric metal-organic architectures.

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FTIR-evolved gas analysis in recent thermoanalytical investigations

Cited by 47 publications

References 308 publications

Development of thermally stable and hygienic colored cotton fabric made by treatment with natural coconut shell extract

Development of thermally stable and hygienic colored cotton fabric made by treatment with natural coconut shell extract

An Innovative Multilevel Test for Hemoglobinopathies: TGA/Chemometrics Simultaneously Identifies and Classifies Sickle Cell Disease From Thalassemia

Bringing a New Flexible Mercaptoacetic Acid Linker to the Design of Coordination Polymers

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