JournaloftheKoreonChemicalSociefy 2000, vol. 94,No.5
PrintedintbeRepublicofKorea
Non-destructive Analysis of Compost by Near Infrared Spectroscopy
Jae Jak Nam+ and Sang Hak Lee*
tNa~m[ in$tim ofAg~~&ral Scienee ond Technology,S~on 441-7~9 KWW Depurtmeni of Chemistq, KyungpookNatiqd UniversiQ,Tmgu 702-701, ?bnz
(RecAvedApril 11, XMIO)
Comparing to the conv~”ond methods MRS showed that /he stand.wdemor of pdMons&P) wwe tM85, 0.4,3.76, 1.12,0.11,0.048,0.24 and 0.08, ad the coefficient of variation was 4.38,5.5,3.2, 1.5, 10.9, 10.6 and 11.970for total nitrogen, total phosphorus, organic matter, total carkm, moistum, Cu, KIO and NazO, respectively. The o?erall results showedthat NIRS can be usedfor a non-destructive and rapid determination of the anrdyks to evaluate the quality of compost samples.
–410-
WA% 1. Chemicalcomposition ofcompmt obtained by near infrared spectroscq@
Calibration samples
Components Validation samples
Range Averageb Range Averagec
Total nitrogen(%) 1.30-2.75 1.93(0.26) 1.40-2.75 i.94(0.28)
organic matted%) 7.36-81.5 69.0(9. 10) 47.3 -77.8 68.3(7.20)
P,O,(%) 1.45-4.86 3.27(0.70) 1.45-4.86 3.42(0.73)
Totrd carbon(%) 23.0-41.1 35.5(3.42) 23.0-39.4 34.7(3.60)
C@ kg-’) O.11-WXI 0.42(0.14) 0.14-0.59 0.44(0.14)
K,0(8 kg-’) 0.92-3.09 2.2~0.53) 0.96-3.09 2.27(0.55)
Nd,O(g kg-’) 0.41-0.98 0.66(0.1 1) 0.494.98 0.67(0.1 1)
Moisture(%) 4.29-10.1 7.28(1.52) 4.39-9.62 7.46(1.51)
‘N umbers inparentheses are strmdarddeviations. b102samples for calituadon. ~3 samples for validation.
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Fig. 1. ~icd near infiwed spectra of severaf composts used in this expaimen~ (a) absorbance, (b) first derivative.
T&le 2. Results of MLR and PLSR analyses for determining 8 components in compost samples by near infrated spectroscopy
Components MCC’ SE~ Calibration metho& used Spectnun
Total nitrogen(%) 0.96 0.085(4.38) PLSR 1st derivative
Organic matter(%) 0.76 3.76(5.50) MLR 1st derivative
P20,(?10) 0.88 0.4(1 1.6) Ml/R absorbance
Totaf carbon(%) 0.95 1.12(3.20) MLR absorbance
Cl@ kg’) 0.96 0.048(10.9) PISR 1st derivative
K,O(g kg-’) 0.95 0.24(10.6) PLSR 1st derivative
Na,O(g kg?) 0.79 0.08(11.9) PLSR absorbance
Moisture(%) 0.97 0.11(1.50) PUiR absorbance
*Numbers in panm!heses am coefficient of variation. ‘MCC muftiple conflation coefficient. bSEP: standard error of prediction.
TT.SR partial least square regmsion, MLR: multiple Iinem ~gtession.
Journal ofthe Korean Chemical Society
413
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Fig. 2. Overall NIR calibration ~rformance for compost analysis for compost analysis; (a) total nitrogen(%), (b) total car- bon(%), (c) organic matter,%), (d) moisture(%), (e) sodium oxide(g kg-’),[f) potassium oxide(g kg-’),(g) phosphate, P,O,(%), (h) coppr(g kg-’).
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2. +y~+Jq -j%kY+@ 4%/%/%!1+%7]5-+ %% 1998.
3.%% + MIS +?#@@ !# @4?-& 1997.
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10. =lw; %-a%’;a%?; w% ?!!+wwlw 1990, 22(6), 675.
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13. ::w;mw;mmx;mm t?*-/@#$f?%
1995, 66(2), 159.
14. %71+%+5 2E”@fq3w!#2=2” +&q) ._E”&+!!
~ 1988.
15.4 q ~ w]&+!’~@ ti~~, 1985.
16. Mark, H. Advances in Near-inj+ared measurenzent~
Patonay, G., Ed.; JAI press: London, England, 1993; p 55.
17. Galactic Industries Corporation PLSplu.V7Q userk guide for GRAMS32LZndGRAMS38@ 1996; p 35.
18. Isaksson, T.; Hildruzw K, L Near Znjra-md Spectros- CO~, Bridgikg b gap behveerzb @dySiS and Oppii- catiq ~ Horwood:hXiOZL ~zjand, lW, p 299.
.loumal of the Karean ChemicalSociety
