Reflectance UV-VIS and UV Resonance Raman spectroscopy in characterization of kraft pulps

Anni Lähdetie; Tiina Liitiä; Tarja Tamminen; Anna-Stiina Jääskeläinen

Reflectance UV-VIS and UV Resonance Raman spectroscopy in characterization of kraft pulps

Anni Lähdetie^*
, Tiina Liitiä
, Tarja Tamminen
, Anna-Stiina Jääskeläinen

^*Corresponding author for this work

Helsinki University of Technology

Research output: Contribution to journal › Article › Scientific › peer-review

14 Citations (Scopus)

Abstract

Reflectance UV-Vis spectroscopy and UV resonance Raman (UVRR) spectroscopy are both nondestructive techniques that are applicable to study trace concentrations of lignin in-situ. In this study, unbleached and bleached softwood kraft pulps were analyzed by reflectance UV-Vis (k/s) and UVRR spectroscopy to follow lignin and hexenuronic acid (HexA) contents and structural changes in residual lignin. The height of the lignin band in the UV-Vis spectra (280 nm) correlated well with the lignin band in the UVRR spectra (1605 cm^-1) for semi- or fully-bleached pulps. However, the correlation was much weaker for unbleached pulps. Also the results for hexenuronic acid content by UV-Vis (240 nm) and UVRR (1658 cm^-1) methods correlated well for most of the pulps, but for unbleached or peroxide-bleached samples the interference from other structures affecting these bands was obvious.

Original language	English
Pages (from-to)	1600-1619
Journal	BioResources
Volume	4
Issue number	4
Publication status	Published - 2009
MoE publication type	A1 Journal article-refereed

Keywords

Bleaching
Kraft pulps
UV resonance Raman (UVRR) spectroscopy
UV-Vis spectroscopy

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https://bioresources.cnr.ncsu.edu/BioRes_04/BioRes_04_4_1600_Lahdetie_LTJ_Reflec_UV_Raman_Kraft_Pulps_572.pdf

Cite this

@article{28496539d82140d796ce15703a1f5577,

title = "Reflectance UV-VIS and UV Resonance Raman spectroscopy in characterization of kraft pulps",

abstract = "Reflectance UV-Vis spectroscopy and UV resonance Raman (UVRR) spectroscopy are both nondestructive techniques that are applicable to study trace concentrations of lignin in-situ. In this study, unbleached and bleached softwood kraft pulps were analyzed by reflectance UV-Vis (k/s) and UVRR spectroscopy to follow lignin and hexenuronic acid (HexA) contents and structural changes in residual lignin. The height of the lignin band in the UV-Vis spectra (280 nm) correlated well with the lignin band in the UVRR spectra (1605 cm-1) for semi- or fully-bleached pulps. However, the correlation was much weaker for unbleached pulps. Also the results for hexenuronic acid content by UV-Vis (240 nm) and UVRR (1658 cm-1) methods correlated well for most of the pulps, but for unbleached or peroxide-bleached samples the interference from other structures affecting these bands was obvious.",

keywords = "Bleaching, Kraft pulps, UV resonance Raman (UVRR) spectroscopy, UV-Vis spectroscopy",

author = "Anni L{\"a}hdetie and Tiina Liiti{\"a} and Tarja Tamminen and Anna-Stiina J{\"a}{\"a}skel{\"a}inen",

year = "2009",

language = "English",

volume = "4",

pages = "1600--1619",

journal = "BioResources",

issn = "1930-2126",

publisher = "North Carolina State University",

number = "4",

}

TY - JOUR

T1 - Reflectance UV-VIS and UV Resonance Raman spectroscopy in characterization of kraft pulps

AU - Lähdetie, Anni

AU - Liitiä, Tiina

AU - Tamminen, Tarja

AU - Jääskeläinen, Anna-Stiina

PY - 2009

Y1 - 2009

N2 - Reflectance UV-Vis spectroscopy and UV resonance Raman (UVRR) spectroscopy are both nondestructive techniques that are applicable to study trace concentrations of lignin in-situ. In this study, unbleached and bleached softwood kraft pulps were analyzed by reflectance UV-Vis (k/s) and UVRR spectroscopy to follow lignin and hexenuronic acid (HexA) contents and structural changes in residual lignin. The height of the lignin band in the UV-Vis spectra (280 nm) correlated well with the lignin band in the UVRR spectra (1605 cm-1) for semi- or fully-bleached pulps. However, the correlation was much weaker for unbleached pulps. Also the results for hexenuronic acid content by UV-Vis (240 nm) and UVRR (1658 cm-1) methods correlated well for most of the pulps, but for unbleached or peroxide-bleached samples the interference from other structures affecting these bands was obvious.

AB - Reflectance UV-Vis spectroscopy and UV resonance Raman (UVRR) spectroscopy are both nondestructive techniques that are applicable to study trace concentrations of lignin in-situ. In this study, unbleached and bleached softwood kraft pulps were analyzed by reflectance UV-Vis (k/s) and UVRR spectroscopy to follow lignin and hexenuronic acid (HexA) contents and structural changes in residual lignin. The height of the lignin band in the UV-Vis spectra (280 nm) correlated well with the lignin band in the UVRR spectra (1605 cm-1) for semi- or fully-bleached pulps. However, the correlation was much weaker for unbleached pulps. Also the results for hexenuronic acid content by UV-Vis (240 nm) and UVRR (1658 cm-1) methods correlated well for most of the pulps, but for unbleached or peroxide-bleached samples the interference from other structures affecting these bands was obvious.

KW - Bleaching

KW - Kraft pulps

KW - UV resonance Raman (UVRR) spectroscopy

KW - UV-Vis spectroscopy

M3 - Article

SN - 1930-2126

VL - 4

SP - 1600

EP - 1619

JO - BioResources

JF - BioResources

IS - 4

ER -

Reflectance UV-VIS and UV Resonance Raman spectroscopy in characterization of kraft pulps

Abstract

Keywords

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