Quantitative Infrared Analysis of Solids in Potassium Bromide Using an Internal Standard

Wilberley, S. E.; Sprague, J. W.; Campbell, J. E.

doi:10.1021/ac60122a009

Cited by 57 publications

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“…The model is highly significant in the regression region, indicating that the second-order equation Figure 2. The FT-IR spectra of pullulan (a, P) and carboxymethylpullulan (b, CMP) were recorded with a VERTEX70 FT-IR spectrometer (Bruker, Karlsruhe, Germany) using a potassium bromide (KBr) pellet method (Wilberley et al, 1957); spectra were recorded in the range of 4,000-400 cm −1 .…”

Section: Discussionmentioning

confidence: 99%

“…Fourier-transform infrared spectroscopy (FT-IR) spectrum was recorded with a VERTEX70 FT-IR spectrometer (Bruker, Karlsruhe, Germany) using a potassium bromide (KBr) pellet method (Wilberley, Sprague, & Campbell, 1957); spectra were recorded in the range of 4,000-400 cm −1 . The degree of substitution and the average molecular weight were measured by titration, combined with high-speed liquid chromatography (HPLC) (Agilent 1100 LC/MSD Trap), respectively.…”

Section: Research Articlementioning

confidence: 99%

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Evaluation of carboxymethylpullulan‐AlCl₃ as a coagulant for water treatment: A case study with kaolin

Chao

Zhang

Wang

et al. 2019

Water Environment Research

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A reduction in the use of aluminum (Al)-based flocculants in the treatment of drinking water is considered essential for human health reasons. In this study, a novel composite flocculant, made of carboxymethylpullulan-AlCl 3 , is evaluated in a lab-scale, jar test system for the flocculation of kaolin. The results showed that the coagulation efficiency of carboxymethylpullulan-AlCl 3 was more effective in reducing turbidity than the solo use of carboxymethylpullulan or AlCl 3 . The optimum treatment conditions assessed by a response surface methodology were obtained at pH 6.50, 13.03 mg/L carboxymethylpullulan, and 94.87 mg/L AlCl 3 . Zeta potential measurements and photometric dispersion analysis demonstrated that AlCl 3 had a more significant influence on charge neutralization than carboxymethylpullulan, whilst carboxymethylpullulan facilitated absorption and the development of particle bridges. Thus, the composite flocculant possessed both advantages that enhanced flocculation, and decreased the dosage of AlCl 3 , thereby reducing the potential for secondary environment pollution. When 90 mg/L carboxymethylpullulan-AlCl 3 was added to the model kaolin suspension characterized by a turbidity of 50 nephelometric turbidity units, the zeta potential and the maximum flocculating activity were determined as −2.28 mV and 98.0%, respectively. The results provide insight into the development of an environment-friendly composite flocculant prepared from water-dissolved polysaccharide and inorganic flocculants. © 2019Water Environment Federation • Practitioner points• A novel composite flocculant CMP-AlCl 3 was achieved by combining CMP and AlCl 3 for water treatment. • The coagulation efficiency of CMP-AlCl 3 was more effective in reducing turbidity than the solo use of CMP or AlCl 3 . • The flocculation efficiency and mechanism were investigated by Zeta potential analysis, surface morphology, electron microscopy, and coagulation.

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Section: Discussionmentioning

confidence: 99%

Section: Research Articlementioning

confidence: 99%

Evaluation of carboxymethylpullulan‐AlCl₃ as a coagulant for water treatment: A case study with kaolin

Chao

Zhang

Wang

et al. 2019

Water Environment Research

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“…Based on the literature data, potassium thiocyanate (KSCN) was chosen because it absorbs in a different region of the samples (a unique absorption at approximately 2063 cm -1 ), is non-toxic and thermally stable. 17 Some characteristic absorption regions were observed in all spectra: O-H stretching vibration at approximately 3375 cm −1 (can be derived from water molecules due to hygroscopicity of KBr, internal standard and/or the sample; therefore, this absorption was disregarded in the analysis); C-H stretching vibration at approximately 2900 cm A high degree of similarity between standard and commercial samples was noted on the FT-IR spectra. However, the standard samples P. niruri and P. urinaria and commercial samples P3, P10 and P11 showed more intense absorption than the other samples analyzed.…”

Section: Ft-ir Datamentioning

confidence: 93%

Authenticity study of Phyllanthus species by NMR and FT-IR Techniques coupled with chemometric methods

Santos¹,

Pereira-Filho²,

Ferreira³

et al. 2012

Quím. Nova

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Recebido em 25/5/12; aceito em 10/8/12; publicado na web em 26/10/12The importance of medicinal plants and their use in industrial applications is increasing worldwide, especially in Brazil. Phyllanthus species, popularly known as "quebra-pedras" in Brazil, are used in folk medicine for treating urinary infections and renal calculus. This paper reports an authenticity study, based on herbal drugs from Phyllanthus species, involving commercial and authentic samples using spectroscopic techniques: FT-IR, 1 H HR-MAS NMR and 1 H NMR in solution, combined with chemometric analysis. The spectroscopic techniques evaluated, coupled with chemometric methods, have great potential in the investigation of complex matrices. Furthermore, several metabolites were identified by the NMR techniques.

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“…After grinding the xylem and the bark samples by ball milling (Perkin Elmer, Boston, MA, USA) and sieving, pellets were pressed consisting of 300 mg potassium bromide and 1 mg ground tissue. As an internal standard we used potassium thiocyanate (KSCN), which was dried carefully under vacuum (Wiberley et al ., 1957; Fraser, 1959; Nakano & Miyazaki, 2003).…”

Section: Methodsmentioning

confidence: 99%

Calcium nutrition has a significant influence on wood formation in poplar

et al. 2007

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Research Summary• To test the effects of calcium on wood formation, Populus tremula × Populus tremuloides clones were supplied with Hoagland solution modified in its calcium contents. Energy-dispersive X-ray analysis (EDXA) revealed an increase in calcium in the phloem, the cambium and the xylem elongation zone with increasing Ca 2+ supply in the nutrient solution.• Using light and electron microscopy, a strong impact was shown on the cambial and the elongation zones under calcium starvation.• Using Fourier transform infrared (FTIR) spectroscopy on wood and bark cells formed under calcium starvation, we detected a reduction of some absorptions, such as carbonyl and methoxy groups from S-lignin. Also, a significant reduction in fiber length was detected with decreasing calcium supply in the nutrient solution. Highperformance liquid chromatography (HPLC) analysis revealed a large increase in sugar concentrations in the leaves, but reduced concentrations in the bark under Ca 2 + deficiency.• In conclusion, our results show a significant influence of calcium on the structure, chemistry and physiology of wood formation. Thus, efficient Ca 2 + supply has to be considered a decisive factor in wood formation.

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Quantitative Infrared Analysis of Solids in Potassium Bromide Using an Internal Standard

Abstract: In previous methods for the quantitative infrared analysis of solids in potassium bromide it has been necessary to obtain pellets of reproducible or known thicknesses.

Cited by 57 publications

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Evaluation of carboxymethylpullulan‐AlCl₃ as a coagulant for water treatment: A case study with kaolin

Evaluation of carboxymethylpullulan‐AlCl₃ as a coagulant for water treatment: A case study with kaolin

Authenticity study of Phyllanthus species by NMR and FT-IR Techniques coupled with chemometric methods

Calcium nutrition has a significant influence on wood formation in poplar

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Quantitative Infrared Analysis of Solids in Potassium Bromide Using an Internal Standard

Abstract: In previous methods for the quantitative infrared analysis of solids in potassium bromide it has been necessary to obtain pellets of reproducible or known thicknesses.

Cited by 57 publications

References 0 publications

Evaluation of carboxymethylpullulan‐AlCl3 as a coagulant for water treatment: A case study with kaolin

Evaluation of carboxymethylpullulan‐AlCl3 as a coagulant for water treatment: A case study with kaolin

Authenticity study of Phyllanthus species by NMR and FT-IR Techniques coupled with chemometric methods

Calcium nutrition has a significant influence on wood formation in poplar

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Evaluation of carboxymethylpullulan‐AlCl₃ as a coagulant for water treatment: A case study with kaolin

Evaluation of carboxymethylpullulan‐AlCl₃ as a coagulant for water treatment: A case study with kaolin