Simplified Determination of Manganese in Caustic Soda

1946 ◽  
Vol 18 (9) ◽  
pp. 556-557
Author(s):  
R.F. Moran ◽  
A.P. McCue
Keyword(s):  
Caustic Soda

Determination of Water in Caustic Soda and Other Alkaline Materials

1947 ◽  
Vol 19 (5) ◽  
pp. 326-329 ◽  
Author(s):  
H. R. Suter
Keyword(s):  
Caustic Soda

scholarly journals Kinetic study of hydrolysis of ethyl acetate using caustic soda

2018 ◽  
Vol 7 (4) ◽  
pp. 1995 ◽  
Author(s):  
Mostafa Ghobashy ◽  
Mamdouh Gadallah ◽  
Tamer T.El-Idreesy ◽  
M. A.Sadek ◽  
Hany A.Elazab
Keyword(s):  
Caustic Soda ◽  
Ethyl Acetate ◽  
Flow Reactor ◽  
Design Method ◽  
Plug Flow ◽  
Tubular Reactor ◽  
Acid Base ◽  
Chemical Reaction Kinetics ◽  
Hydrolysis Of

We report here, the hydrolysis of ethyl acetate by using caustic soda which is followed by means of conductance measurements which is widely used in chemical industry. The main aim of this research is to study the parameters of production of ethyl acetate by chemical reaction kinetics using an anion ion-exchange acting as a catalyst and acid-base titrations. The reaction of ethyl acetate and sodium hydroxide (caustic-soda) is done in a plug-flow reactor (steady-state tubular reactor) under the effect of different parameters including temperature, concentration and flow-rate, which allows the determination of activation energy and rate constants, due to large number of experiments. Factorial design method is used for the calculations of the experiment. It was determined that the order of the reaction is a second-order reaction.  

Studies on the Carbon and Nitrogen Cycles in the soil. II. The Extraction of the Organic Matter of the Soil With Alkali

1930 ◽  
Vol 20 (3) ◽  
pp. 460-477 ◽  
Author(s):  
C. W. B. Arnold ◽  
H. J. Page
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Caustic Soda ◽  
Organic Manure ◽  
Humic Matter ◽  
Colour Intensity ◽  
Alkali Extraction ◽  
Carbon And Nitrogen ◽  
Manurial Treatment

The alkali extraction of the organic matter from the soils of certain plots of the classical permanent experiments on Barnfield and Broadbalk at Rothamsted, receiving respectively organic manure, artificial fertilisers and no manurial treatment, has been studied, together with a colorimetric examination of the extracts for the comparison of the content of humic matter.It is shown that, in spite of the different cultural and manurial treatments which the different plots have received, there is a marked similarity in the properties of the organic matter of these soils, with regard to its behaviour on extraction with cold and hot dilute caustic soda, and the colour intensity of the organic matter in the extracts.The methods used for the determination of organic carbon in the soils and their extracts are noted in an Appendix.The results discussed in this paper are further considered, along with those in the two next following Parts (III and IV), in Part V of this series, in their bearings on the origin of the humic matter of the soil.

Determination of small quantities of manganese in caustic soda

The Analyst ◽  
1947 ◽  
Vol 72 (860) ◽  
pp. 472 ◽  
Author(s):  
C. G. Ethrington ◽  
J. W. Hughes
Keyword(s):  
Caustic Soda

Determination of Manganese in Caustic Soda

1945 ◽  
Vol 17 (1) ◽  
pp. 28-31 ◽  
Author(s):  
Dwight Williams ◽  
R. V. Andes
Keyword(s):  
Caustic Soda

scholarly journals Application of Silver Periodate for the Colorimetric Determination of the Trace Manganese in Caustic Soda

1955 ◽  
Vol 4 (6) ◽  
pp. 353-356
Author(s):  
TAKUJI ITO ◽  
KEIICHI HARA ◽  
YOSHIO HOSHINO
Keyword(s):  
Caustic Soda ◽  
Colorimetric Determination

Determination of trace amounts of calcium and barium in caustic soda

1967 ◽  
Vol 232 (4) ◽  
pp. 274-277
Author(s):  
A. J. van der Reyden ◽  
R. J. Polman
Keyword(s):  
Caustic Soda

STUDIES ON THE DETERMINATION OF URINARY CORTICOSTEROIDS

1953 ◽  
Vol 9 (4) ◽  
pp. 391-400 ◽  
Author(s):  
CONSTANCE de COURCY ◽  
C. H. GRAY
Keyword(s):  
Caustic Soda ◽  
Acid Hydrolysis ◽  
Paper Chromatography ◽  
Normal Values ◽  
Regular Form ◽  
Water Fraction ◽  
Modified Method ◽  
Very High

1. The reducing method of Talbot, Saltzman, Wixom & Wolfe [1945], and the formaldehyde method of Corcoran & Page [1948], as well as a modification of that of Daughaday, Jaffe & Williams [1948] for the estimation of urinary corticosteroids, have been critically examined. 2. A study has been made of the distribution of reducing material, of formaldehydogenic material and of reducing and Δ4-3-ketosteroids, in the various fractions obtained during the various purification procedures applied to the crude CHCl3 extract. 3. Caustic soda washing does not remove significant quantities of the steroids investigated, although non-steroid reducing and uncharacterized formaldehydogenic material is removed. 4. The water fraction of the benzene-water partition contains all the reducing and Δ4-3-ketosteroids so far detected in urine. 5. The formaldehydogenic method of Corcoran & Page gives slightly higher results than the modified method of Daughaday et al. 6. The acid hydrolysis curves obtained with the Talbot method resembled those described by Paterson, Cox & Marrian [1950], but no regular form of hydrolysis curve was obtained when either formaldehydogenic method was used. 7. A comparison of normal values obtained by the authors using the chemical and paper chromatography techniques revealed that the formaldehydogenic methods estimate a very high proportion of uncharacterized material, whereas results by the reducing method of Talbot et al. approximate relatively closely to those obtained by semiquantitative paper chromatography.

scholarly journals Determination of calcium and magnesium in caustic soda

1959 ◽  
Vol 8 (12) ◽  
pp. 782-785 ◽  
Author(s):  
Toshiharu TAKAGI ◽  
Hiroshi IMOTO
Keyword(s):  
Caustic Soda ◽  
Calcium And Magnesium

scholarly journals (65) Spectrochemical Determination of the Trace Impurities in the Salt, Brine and Caustic Soda.

1955 ◽  
Vol 58 (3) ◽  
pp. 170-174
Author(s):  
Eizo Yasui ◽  
Hiroshi Suzuki
Keyword(s):  
Caustic Soda ◽  
Trace Impurities ◽  
Salt Brine
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