Soil and Environmental Analysis: Modern Instrumental Techniques - Chapter 12 (end) pps

... Raoufi, and H. Sharghi. 2000. Solid phase extraction and determination of lead in soil and water samples using octadecyl silica membrane disks modified by bis[1-hydroxy-9,10-anthraquinone-2-methyl]sul- fide ... and 2,4-dibromophenol (2,4-DBP) are the target determinants, and 2,4-dibromophenol is used as an internal standard. Soil samples are sieved through a 2 mm sieve and stored...

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... U.S.A. tel: 21 2-6 9 6-9 000; fax: 21 2-6 8 5-4 540 Distribution and Customer Service Marcel Dekker, Inc., Cimarron Road, Monticello, New York 127 01, U.S.A. tel: 80 0-2 2 8-1 160; fax: 84 5-7 9 6-1 772 Eastern ... Metabolism and Action, edited by M. Daniel and R. P. Purkayastha Soil- Water Interactions: Mechanisms and Applications, Second Edition, Re- vised and...

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... between 512 Â 512 and 4096 Â4096. There are several different types of such so-called charge- transfer devices (CTD), including charge-coupled (CCD), segmented charge-coupled (SCD), and charge-injection ... optimization criteria are signal-to-background ratio and signal-to-noise ratio. In most instances, however, ICP-AES is used as a multielement tool, and therefore compro- mise oper...

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... a working range of pH 1–13, and that is a great deal tougher than any glass electrode. Mettler-Toledo and Thermo-Russell market ISFET pH electrodes for demanding environmental applications, but ... solid-state 5Â10 À5 to 1 Potassium plastic 10 À6 to 1 Copper solid-state 10 À8 to 0.1 Sulfide solid-state 10 À7 to 1 Cyanide solid-state 8 Â10 À6 to 10 À2 Sodium glass 10 À6 to 1 Fluoride soli...

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... R-PDAH 2 þPADH 2þ 2 þ2Cl À , ,R-HCO 3 þNaHCO 3 R-PDAH 2 þPDAH 2þ 2 þ2C1 À Sample R-HCO 3 þMA! R-H þMA!R-H þMA R-PDAH 2 þMA þ2C1 À ! R-A þMHCO 3 R-M þPDAH 2þ 2 þ2C1 À þA R-A þNaHCO 3 ! R-M þHCl!R-H þMC1 R-M þPDAH 2þ 2 þ2C1 À ! R-HCO 3 þNaA R-PDAH 2 þMC1 2 Suppressor ... R-PDAH 2 þMC1 2 Suppressor column Eluent R-H þMHCO 3 ! R-OH þHCl!R-Cl þH 2 O 2R-OH þPDAH 2þ 2 þ2C1 À ! R-M þH 2 CO 3 2R-C1 þP...

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... Proc. 34:608–610. Tabatabai, M.A. and J. M. Bremner. 1991. Automated instruments for determina- tion of total carbon, nitrogen, and sulfur in soils by combustion techniques. In: Soil Analysis: Modern Instrumental ... changes in soil N and P during slash -and- burn clearing of a Mexican dry tropical forest. They measured total N in the ash and total C and N in the topsoil...

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... small diameter (sub-mm for the latest third-generation synchrotrons), it can be used as an ‘‘x-ray fluorescence’’ microprobe. Furthermore, x-ray fluores- cence measurements can be combined wi th x-ray absorption ... thermal degradation and mechanical failure, the window must be made sufficiently thick (perhaps 200–300 mm) and, in consequence, the low-energy x-ray output of the tube is attenuat...

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... 4,4 0 (5 0 )-bis-t-butyl- cyclohexano-18-crown-6, a highly selective complexant for Sr 2þ , immobilized on an inert support. The column is washed with 12 column volumes of 8 M HNO 3 , which removes Ca and ... the development of ICP-MS, and there are a number of NAA methods for long-lived radionuclides, principally 129 I (Muramatsu and Yoshida, 1995; Parry et al., 1995), 232 Th and...

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... (including soil extracts) for 15 N determination. NO  3 is converted to 1-phenylazo-2-naphthol (Sudan-1), and the product is concentrated by reverse-phase chromatography before CF-IRMS. The ... C., and McDonnell, J.J., eds.). Elsevier, Amsterdam, pp. 87–118. Johnston, A.M., Scrimgeour, C.M., Henry, M.O., and Handley, L.L. 1999. Isolation of NO  3 -N as 1-phenylazo-2-naphthol (Sudan-...

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... frequency and sampling times on chamber-based measurements of N 2 O emissions from fertilized soils. Glob . Change Biol. 7: 933–945. Smith, K.A. and C.E. Mullins, eds. 2000. Soil and Environmental Analysis: ... Average emissions from forest soils were 15 mgN 2 O-N m À2 h À1 , which increased to 27 mg N 2 O-N m À2 h À1 after clearing, and gave short-term peaks averaging 123 mg N...

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