Benefits, limitations and uncertainty of in situ spectrometry

S. Winkler; J. L. Bertrand-Krajewski; A. Torres; E. Saracevic

doi:10.2166/wst.2008.145

Benefits, limitations and uncertainty of in situ spectrometry

S. Winkler
, J. L. Bertrand-Krajewski
, A. Torres
, E. Saracevic

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

11 Scopus citations

Abstract

In situ spectrometers are comparable robust instruments and can be operated long term with relatively low maintenance demand. The decisive factor for their applicability is the development of a medium and installation location specific correlation model, which estimates the concentration of the requested target parameter from the measured absorption values. In some cases it might turn out, that the development of a single site specific correlation model is not sufficient, due to frequent and substantial variations of the (waste) water composition. In order to assess the total uncertainty of in situ spectrometry, a comprehensive lab test was carried out. It includes a detailed investigation of the uncertainty of CODreference methods (DIN and small tube tests), a precision analysis of the absorption spectra and the impact of those two factors on the total uncertainty of the COD_EQ correlation model.

Translated title of the contribution	Beneficios, limitaciones e incertidumbre de la espectrometría in situ
Original language	English
Pages (from-to)	1651-1658
Number of pages	8
Journal	Water Science and Technology
Volume	57
Issue number	10
DOIs	https://doi.org/10.2166/wst.2008.145
State	Published - 2008
Externally published	Yes

Keywords

COD
Optical sensors
PCA
PLS
Spectrometry
Turbidimetry
Uncertainty

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10.2166/wst.2008.145

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title = "Benefits, limitations and uncertainty of in situ spectrometry",

abstract = "In situ spectrometers are comparable robust instruments and can be operated long term with relatively low maintenance demand. The decisive factor for their applicability is the development of a medium and installation location specific correlation model, which estimates the concentration of the requested target parameter from the measured absorption values. In some cases it might turn out, that the development of a single site specific correlation model is not sufficient, due to frequent and substantial variations of the (waste) water composition. In order to assess the total uncertainty of in situ spectrometry, a comprehensive lab test was carried out. It includes a detailed investigation of the uncertainty of CODreference methods (DIN and small tube tests), a precision analysis of the absorption spectra and the impact of those two factors on the total uncertainty of the CODEQ correlation model.",

keywords = "COD, Optical sensors, PCA, PLS, Spectrometry, Turbidimetry, Uncertainty, DQO, Sensores {\'o}pticos, PCA, PLS, Espectrometr{\'i}a, Turbidimetr{\'i}a, Incertidumbre",

author = "S. Winkler and Bertrand-Krajewski, \{J. L.\} and A. Torres and E. Saracevic",

year = "2008",

doi = "10.2166/wst.2008.145",

language = "English",

volume = "57",

pages = "1651--1658",

journal = "Water Science and Technology",

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publisher = "IWA Publishing",

number = "10",

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TY - JOUR

T1 - Benefits, limitations and uncertainty of in situ spectrometry

AU - Winkler, S.

AU - Bertrand-Krajewski, J. L.

AU - Torres, A.

AU - Saracevic, E.

PY - 2008

Y1 - 2008

N2 - In situ spectrometers are comparable robust instruments and can be operated long term with relatively low maintenance demand. The decisive factor for their applicability is the development of a medium and installation location specific correlation model, which estimates the concentration of the requested target parameter from the measured absorption values. In some cases it might turn out, that the development of a single site specific correlation model is not sufficient, due to frequent and substantial variations of the (waste) water composition. In order to assess the total uncertainty of in situ spectrometry, a comprehensive lab test was carried out. It includes a detailed investigation of the uncertainty of CODreference methods (DIN and small tube tests), a precision analysis of the absorption spectra and the impact of those two factors on the total uncertainty of the CODEQ correlation model.

AB - In situ spectrometers are comparable robust instruments and can be operated long term with relatively low maintenance demand. The decisive factor for their applicability is the development of a medium and installation location specific correlation model, which estimates the concentration of the requested target parameter from the measured absorption values. In some cases it might turn out, that the development of a single site specific correlation model is not sufficient, due to frequent and substantial variations of the (waste) water composition. In order to assess the total uncertainty of in situ spectrometry, a comprehensive lab test was carried out. It includes a detailed investigation of the uncertainty of CODreference methods (DIN and small tube tests), a precision analysis of the absorption spectra and the impact of those two factors on the total uncertainty of the CODEQ correlation model.

KW - COD

KW - Optical sensors

KW - PCA

KW - PLS

KW - Spectrometry

KW - Turbidimetry

KW - Uncertainty

KW - DQO

KW - Sensores ópticos

KW - PCA

KW - PLS

KW - Espectrometría

KW - Turbidimetría

KW - Incertidumbre

UR - https://www.scopus.com/pages/publications/45549107200

U2 - 10.2166/wst.2008.145

DO - 10.2166/wst.2008.145

M3 - Article

C2 - 18520024

AN - SCOPUS:45549107200

SN - 0273-1223

VL - 57

SP - 1651

EP - 1658

JO - Water Science and Technology

JF - Water Science and Technology

IS - 10

ER -

Benefits, limitations and uncertainty of in situ spectrometry

Abstract

Keywords

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