An efficient approach to the quantitative analysis of humic acid in water

Wang, Xue; Li, Bao Qiong; Zhai, Hong Lin; Xiong, Meng Yi; Liu, Ying

doi:10.1016/j.foodchem.2015.06.074

Cited by 20 publications

(8 citation statements)

References 29 publications

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“…curve resolution with alternating least-squares [12,13,16] were applied. Recently, as a novel strategy, several image moment methods have been applied successfully to the 3D spectra of HPLC coupled with photodiode array detection [17][18][19], excitation-emission matrix fluorescence [20,21] and obtained satisfactory results.…”

Section: Other Techniques 3055mentioning

confidence: 99%

“…By means of chemometrics technologies, some studies on the analysis of complex samples based on LC–MS spectra had been reported, in which the alternating trilinear decomposition algorithm and multivariate curve resolution with alternating least‐squares were applied. Recently, as a novel strategy, several image moment methods have been applied successfully to the 3D spectra of HPLC coupled with photodiode array detection , excitation‐emission matrix fluorescence and obtained satisfactory results.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative analysis of multiple components based on liquid chromatography with mass spectrometry in full scan mode

Wang

et al. 2016

J of Separation Science

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Although liquid chromatography with mass spectrometry in full scan mode can obtain all the signals simultaneously in a large range and low cost, it is rarely used in quantitative analysis due to several problems such as chromatographic drifts and peak overlap. In this paper, we propose a Tchebichef moment method for the simultaneous quantitative analysis of three active compounds in Qingrejiedu oral liquid based on three-dimensional spectra in full scan mode of liquid chromatography with mass spectrometry. After the Tchebichef moments were calculated directly from the spectra, the quantitative linear models for three active compounds were established by stepwise regression. All the correlation coefficients were more than 0.9978. The limits of detection and limits of quantitation were less than 0.11 and 0.49 μg/mL, respectively. The intra- and interday precisions were less than 6.54 and 9.47%, while the recovery ranged from 102.56 to 112.15%. Owing to the advantages of multi-resolution and inherent invariance properties, Tchebichef moments could provide favorable results even in the situation of peaks shifting and overlapping, unknown interferences and noise signals, so it could be applied to the analysis of three-dimensional spectra in full scan mode of liquid chromatography with mass spectrometry.

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Section: Other Techniques 3055mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of multiple components based on liquid chromatography with mass spectrometry in full scan mode

Wang

et al. 2016

J of Separation Science

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“…Para minimizar os efeitos negativos do aspecto da água no decorrer dos processos, algumas indústrias de processamento de maçãs adotam sistemas convencionais de filtração e de desinfecção, usando cloro ativo. Contudo, esses sistemas de filtração são ineficientes para a remoção de material coloidal e de matéria orgânica natural, como substâncias húmicas (MATILAINEN; VEPSÄLÄINEN; SILLANPÄÄ, 2010; SÄRKKÄ; VEPSÄLÄINEN; SILLANPÄÄ, 2015), que reagem quimicamente com o cloro ativo podendo levar a formação de substâncias cancerígenas (CHENG et al, 2003;SÄRKKÄ;SILLANPÄÄ, 2015;WANG et al, 2016;WENG et al, 2006;XIAO et al, 2014).…”

Section: Introductionunclassified

Caracterização De Água De Processamento De Indústria Maçãs

Gamba¹,

Carpes²,

Hemkemeier³

2017

Blucher Chemical Engineering Proceedings

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RESUMO -As indústrias da cadeia produtiva de maçãs do Estado do RS utiliza elevada demanda de água para a higienização e transporte das frutas durante seu processamento. Quando utilizadas correntes hídricas para esse transporte, evita-se o manuseio e consequentemente a deformação das maçãs. Assim, a água utilizada no processo é considerada um ponto de controle imprescindível na indústria, já que esta água deve seguir padrões de potabilidade, conforme a legislação vigente, por estar em contato direto com as frutas. Todavia, o tempo de residência da água nos tanques e calhas durante o processo, varia de acordo com a presença de interferentes físico-químicos e microbiológicas, que alteram diretamente a qualidade da água, bem como das frutas. Diante do exposto, o presente trabalho visou caracterizar a água de processamento de uma indústria de maçãs, quanto a concentração de poluentes que alteram a qualidade da mesma na planta industrial. Observou-se que os parâmetros utilizados para a caracterização das amostras apresentaram variações entre as coletas, pois são de amostras reais, e sofrem interferência e heterogeneidade durante o ciclo de uso. INTRODUÇÃOA demanda hídrica em indústrias, principalmente no ramo alimentício é justificada pela sua presença em diversas etapas do processamento. No caso em estudo, o uso de correntes hídricas é responsável não apenas pela higienização como também pelo transporte das maçãs por meio de calhas, a fim de evitar choques mecânicos provenientes de impactos, compressão, vibração, cortes e rachaduras que podem ocorrer durante a colheita e processo. E que representam um grave risco para a qualidade fisiológica, metabólica, sensorial e sanitária das maçãs, visto que por meio dessas lesões mecânicas pode haver a disseminação de doenças fúngicas.A colheita das maçãs ocorre entre os meses de fevereiro a abril, em alguns casos se estende até o mês de maio (AGAPOMI, 2015;BNDES, 2010;SANHUEZA et al., 2003), e durante esse período, as maçãs colhidas são encaminhadas para a indústria, onde a logística da cadeia produtiva, favorece a contaminação da água de processo por poluentes e microrganismos que reduzem o ciclo de vida útil da água.

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“…However, according to some recent studies on the analysis of humic acid, it is quite difficult to employ such spectrometry because of the many complicated signals originated from the decomposition of the humic acid. (Giovanela et al, 2004;Rodríguez et al, 2016;Wang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Humic Acids from Trees and Soils Analyzed by the NICA-Donnan Model and UV-Vis Spectrum

Shoji

Iwase

2017

J. Chem. Eng. Japan / JCEJ

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Chemical and instrumental analysis of humic acids (HAs) from four kinds of trees and soils in which the same trees were planted are performed using a chemical equilibrium model and UV-vis spectroscopies. First, the bindings of protons and copper ions to three types of binding sites in HAs were analyzed using the NICA-Donnan model. The model was used to formulate the binding of copper ions to HA at various pHs. The degree of darkness of the HAs, representing the number of the chromophores, including carboxyl and phenolic groups, are depended on the maximum adsorption quantities of copper ions analyzed by the equilibrium model. Therefore, we can partly estimate the copper adsorption amounts of humic acid by only using UV-vis spectroscopic analysis without employing further instrumental analysis or copper adsorption isotherm experiments.

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An efficient approach to the quantitative analysis of humic acid in water

Cited by 20 publications

References 29 publications

Quantitative analysis of multiple components based on liquid chromatography with mass spectrometry in full scan mode

Quantitative analysis of multiple components based on liquid chromatography with mass spectrometry in full scan mode

Caracterização De Água De Processamento De Indústria Maçãs

Characterization of Humic Acids from Trees and Soils Analyzed by the NICA-Donnan Model and UV-Vis Spectrum

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