Colorimetric methods of analysis

In the past, the reduction of metallic ions and certain diazotised organic compounds by hindered phenols has served as the basis for colorimetric methods of analysis [112-114],... 

Oddy, A. (1986). The touchstone the oldest colorimetric method of analysis. Endeavour 10 164-166. 

Describe enzymatic assays based on colorimetric method of analysis under the following two situations ... 

Std Methods Chem Analysis (Ref 6). The method consists of titration with 0.1M KI03 soln, standardized against pure N2H4.H2S04 Refs 1) F.D. Snell C.T. Snell, Colorimetric Methods of Analysis , VanNostrand, NY, Vol 1 (1936), p 310 2) W.W. Scott, Standard... 

Roth et al in PicArsnTechMemo No GL-8-59 (See Addnl Ref II) d) Improved colorimetric method of analysis of binary. mixtures of nitrate and nitramine or nitramine alone. 

Snell et al, "Colorimetric Methods of Analysis," vol IIA, Van Nostrand(1959), 156-87 Aluminum Alkyls were prepd in 1865 hy the action of aluminum on mercury alkyls(Refs 1 6)(see also Note below). Later they were made by the action of "electron metal (alloy of Al and Mg) on a sola of the alkyl halide in ether (Refs 2 6). The Al trialkyU are volatile liquids, violently attacked by air or water. Following are examples trimethylaluminum A1(CHS), d 0.752 at 20°/4°, mp 15.0°, bp 126. la, tri-ethyl-, Al(CaH5) d 0.837 at 20°/4°, mp -52.5°, bp 185.6a, tri-n-propyl-, Al(n-CjH,),. d 0.823 at 20°/4°, mp -107°, bp ca 250° (Refs 3,4,5 6). These three compds are inflammable in air and for this reason may be of interest as components of liquid propellants for rockets Note The prepn of a compd called "Aethyl-aluminium" was claimed by W.Hallwachs A.Schaffarik, Ann 109, 207(1859) hut it was not properly identified and its props (except that it is violently decomp by water) were not detd... 

Snell et al, "Colorimetric Methods of Analysis," vol II A, Van Nostrand(1959), 156-87 Aluminum Alkyls were prepd in 1865 by tbe action of aluminum on mercury alkyls(Refs 1 6)(see also Note below). Later they were made by the action of "electron metal (alloy of Al and Mg) on a soln of the alkyl halide in ether (Refs 2 6). The Al trialkyls are volatile liquids, violently attacked by air or water. 

Refs l)F.D.Snell C.T,Snell, "Colorimetric Methods of Analysis , Van Nostrand, NY Vol 1 (1948) (Theory, instruments, pH detn) Vol 2 (1949) (Inorganic compds) Vol 2A(1959) (Including photometric methods) Vol 3(1953) (Organic compds, 1st book) Vol 3A (1961) (In-duding photometric methods) and Vol 3 (1954) (Organic compds, 2nd book) 2)Kirk Othmer 4(1949), 267-76 (Colorimetry fluorimetry)... 

Snell, F. Snell, C. Colorimetric Methods of Analysis Van Nostrand and Rheinhold, New York, 1970. 

Foster Dee Snell and Cornelia T Snell, Colorimetric methods of analysis. Volume II, (Inorganic), pp792-794. 

Snell, F. D. Snell, C. T, "Colorimetric Methods of Analysis Including Some Turbidimetric and Nephelometric Methods," 3rd ed. Van Nostrand Princeton, N.J., 1971 Vol. 4AAA. 

Simplex optimization has been used with success in many areas of analytical chemistry, e.g. atomic-absorption spectrometry, gas chromatography, colorimetric methods of analysis, plasma spectrometry, and the use of centrifugal analysers in clinical chemistry. When an instrument is interfaced with a computer, the results of simplex optimization can be used to initiate automatic improvements in the instrument variables. 

Snell, F.D. and Snell, C.T., Colorimetric Methods of Analysis, Including Photometric and Fluorimetric Methods, Vols I-IV, and various supplements up to Vol IV AAA, Van Nostrand Reinhold, (1919-1971). 

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