@article {4274,
	title = {New structures - new insights: Progress in structure analysis of nanoporous materials},
	journal = {Microporous and Mesoporous Materials},
	volume = {21},
	number = {4-6},
	year = {1998},
	note = {ISI Document Delivery No.: 116MWTimes Cited: 24Cited Reference Count: 33International Symposium on Zeolites and Microporous Crystals (ZMPC 97)AUG 24-27, 1997TOKYO, JAPANWaseda Univ, Kanto Dist Council Catalysis Soc Japan},
	month = {May},
	pages = {183-197},
	type = {Proceedings Paper},
	abstract = {In the recent past structure determination of microporous materials has experienced considerable developments in methodology. The FOCUS method: high resolution powder diffraction data used for direct method structure solution in combination with crystal chemistry based modelling. The models are retrieved from electron density maps calculated in direct method runs, energy minimized and checked through for realistic angles and distances values. The SUM-TF method: diffraction patterns at moderate resolution analysed with direct methods using a modified tangent formula which includes Patterson information for the structure solving. In this way the atomic resolution criterion for direct methods is bypassed. This overview gives a summary of the structures successfully solved using these new techniques. (C) 1998 Elsevier Science B.V. All rights reserved.},
	keywords = {CRYSTAL-STRUCTURE, kanemite, LAYER SILICATE, layer silicates, PATTERSON-FUNCTION ARGUMENTS, POWDER DIFFRACTION, POWDER DIFFRACTION DATA, REFLECTIONS, RESOLUTION, Rietveld analysis, RUB-15, RUB-18, structure solution, TANGENT FORMULA, VNI, zeolite, zeolites},
	isbn = {1387-1811},
	url = {<Go to ISI>://000075730000003},
	author = {Gies, H. and Marler, B. and Vortmann, S. and Oberhagemann, U. and Bayat, P. and Krink, K. and Rius, J. and Wolf, I. and Fyfe, C.}
}
@article {4026,
	title = {Simplex optimisation of conditions for the determination of antimony in environmental samples by using electrothermal atomic absorption spectrometry},
	journal = {Talanta},
	volume = {44},
	number = {7},
	year = {1997},
	note = {ISI Document Delivery No.: XE053Times Cited: 14Cited Reference Count: 24},
	month = {Jul},
	pages = {1241-1251},
	type = {Article},
	abstract = {Analysis of the total antimony in plant material was unsuccessful using the electrothermal atomic absorption spectrometry (ETAAS) conditions recommended by the instrument manufacturer. For this reason, an optimisation procedure utilising the Plackett-Burman method, simplex optimisation and visualisation of the generated response surface via principal components analysis, was carried out. The Plackett-Burman method was used to eliminate four of the initial variables chosen. Four variables (atomisation temperature, atomisation time, ash temperature and modifier concentration) were subsequently optimised using the composite modified simplex method and the results were visualised as a contour diagram, after reduction to two principal components. The optimised conditions were used for the analysis of both an acid digested pine needle standard reference material (NIST 1575) and a pond weed sample, collected from a contaminated site at Yellowknife Bay, Yellowknife, NWT, Canada. The total concentration of antimony present in the pine needles was statistically indistinguishable from the non-certified value, as was the value for the pond weed sample, compared with a value determined by neutron activation analysis (NAA). The results for the analysis of the pond weed sample by ETAAS agreed with those obtained from a subsequent analysis by inductively coupled plasma-mass spectrometry. (C) 1997 Elsevier Science B.V.},
	keywords = {ANTIMONY, electrothermal atomic absorption spectroscopy, environmental, GRAPHITE-FURNACE, HYDRIDE GENERATION, INTERFERENCES, OPTIMIZATION, PLASMA-MASS-SPECTROMETRY, REFLECTIONS, SAMPLES, simplex optimisation and Plackett-Burman design},
	isbn = {0039-9140},
	url = {<Go to ISI>://A1997XE05300013},
	author = {Koch, I. and Harrington, C. F. and Reimer, K. J. and Cullen, W. R.}
}
@article {3140,
	title = {SIMPLEX OPTIMIZATION OF CONDITIONS FOR THE DETERMINATION OF ARSENIC IN ENVIRONMENTAL-SAMPLES BY USING ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY},
	journal = {Talanta},
	volume = {41},
	number = {2},
	year = {1994},
	note = {ISI Document Delivery No.: NJ812Times Cited: 18Cited Reference Count: 25},
	month = {Feb},
	pages = {205-209},
	type = {Article},
	abstract = {Simplex optimization was used to efficiently delineate the optimum experimental conditions to be used for the electrothermal atomic absorption spectrometric analysis of arsenic in a standard reference material of marine origin. Four experimental variables, were considered: ashing temperature, atomization temperature, modifier concentration, and atomization ramping time. This combination of methods and materials provides a powerful means of rapidly improving the experimental conditions used for analysis of arsenic in a wide variety of samples of environmental origin. Excellent recoveries of arsenic were obtained when using the optimum electrothermal atomic absorption spectrometry conditions to analyze standard solutions of arsenobetaine, arsenocholine and tetramethylarsonium iodide.},
	keywords = {GRAPHITE-FURNACE, REFLECTIONS},
	isbn = {0039-9140},
	url = {<Go to ISI>://A1994NJ81200007},
	author = {Pergantis, S. A. and Cullen, W. R. and Wade, A. P.}
}
