Microchemical Method for Oxygen

1963 ◽  
Vol 46 (4) ◽  
pp. 559-564
Author(s):  
Al Steyermakk
Keyword(s):  
Organic Compounds ◽  
The Other ◽  
Gravimetric Procedure

Abstract A specific gravimetric procedure was submitted to the collaborators for this year’s study on the determination of oxygen in organic compounds. Three compounds were analyzed: one contained no oxygen, one contained only carbon, hydrogen, and oxygen, and the other was a sulfa compound. The results obtained were good, and the method is recommended as official, first action.

Total Organic Carbon as an Index for Specification of Water for Injection

1987 ◽  
Vol 70 (4) ◽  
pp. 681-686
Author(s):  
Rieko Matsuda ◽  
Mumio Ishibashi ◽  
Mitsuru Uchiyama ◽  
Tamio Hiraoka ◽  
Haruhiko Hoshida ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Organic Compounds ◽  
Potassium Permanganate ◽  
Uv Spectroscopy ◽  
The Other ◽  
Model Compounds ◽  
Analysis Determination ◽  
Permanganate Consumption

Abstract Determination of organic compounds present as contaminants in purified water is of great importance. Total organic carbon (TOC) may be a useful parameter for evaluating the purity of water. This paper describes and compares the analytical results for solutions of 12 model compounds obtained by 3 methods: total organic carbon (TOC) analysis, determination of potassium permanganate consumption, and UV spectroscopy. TOC analysis gave values corresponding to the expected amounts of organic carbon for all the model compounds, whereas the other 2 methods gave highly variable results.

scholarly journals Determination Of Organic Compound Pollution In The Springs At Pesedahan Village, Karangasem By Permanganometri

2017 ◽  
Vol 4 (1) ◽  
pp. 5-9
Author(s):  
I Made Arya Wirya Atmaja ◽  
I Made Oka Adi Parwata ◽  
Putu Gede Subhaktiyasa
Keyword(s):  
Organic Compound ◽  
Organic Compounds ◽  
Quantitative Research ◽  
The Other ◽  
Compound Pollution ◽  
Living Things ◽  
Main Component ◽  
Water Springs ◽  
Maximum Limit

Introduction: Water is the main component / important for living things, so its quality and quantity needs to be maintained. Similarly, the springs in the Pesedahan Village, Manggis District, Karangasem Regency that gives an important influence for the community’s activities there.Water quality decline to a certain level caused by one of the organic compounds contamination. The decrease of water quality to a certain level is caused by one of the organic compounds. Method: This research is a quantitative research. The purpose of this research is to determine and analyze the level of organic compound spring in Pesedahan Village, Manggis Subdistrict, Karangasem Regency. The research was conducted on 5 springs in the location, each taken 2 L as sample. Result: The result of the research by permanganometri result showed that the data of organic compound samples 1, 2, 3, 4, and 5 sequentially in mg / L were 8,2581, 8,8481, 11,0178, 9,8381 and 6,6781, respectively With Permenkes R1 No.492 / Menkes / Per / IV / 2010 found that the organic compound of sample 3 exceeded the maximum limit, while the other four samples were below maximum. Discussion: For that it is advisable for the community to maintain the safety of water springs, one of which cleans the area of ​​the spring, and does not dispose of waste around the springs location.

Titrimetric and gravimetric determination of the specific pore volume of microparticulate silica gels

1988 ◽  
Vol 53 (2) ◽  
pp. 269-277 ◽  
Author(s):  
Zdeněk Šimek ◽  
Radim Vespalec ◽  
Jiří Neča
Keyword(s):  
Pore Volume ◽  
Barometric Pressure ◽  
Point Of View ◽  
The Other ◽  
Silica Gels ◽  
Specific Pore Volume ◽  
Gravimetric Determination ◽  
Relative Standard ◽  
Gravimetric Procedure

The titrimetric and gravimetric methods of determination of the specific pore volume were studied unmodified and modified chromatographic silica gels of mean particle size above 5 μm. The apparatus and titrimetric procedure suggested elsewhere were adapted so that the relative standard deviation of measurement did not exceed 2%. Water, n-octane, and methanol were used as titrants, and methanol was found to suit best from the point of view of accuracy and rapidity of analysis and versatility of use. This solvent is also suitable for the gravimetric measurements, which can be carried out without thermostatting and at barometric pressure. The titrimetric procedure is less time consuming than the gravimetric procedure which, on the other hand, is less tedious and less instrumentation-demanding.

Determination of the lattice translation across {110} APBs in GaAs

1988 ◽  
Vol 46 ◽  
pp. 600-601
Author(s):  
D.R. Rasmussen ◽  
N.-H. Cho ◽  
C.B. Carter
Keyword(s):  
Grain Boundaries ◽  
Lower Energy ◽  
Antiphase Boundary ◽  
The Other ◽  
Boundary Structure ◽  
Interface Plane ◽  
Inversion Symmetry ◽  
High Angle ◽  
Equilibrium Distance

Domains in GaAs can exist which are related to one another by the inversion symmetry, i.e., the sites of gallium and arsenic in one domain are interchanged in the other domain. The boundary between these two different domains is known as an antiphase boundary [1], In the terminology used to describe grain boundaries, the grains on either side of this boundary can be regarded as being Σ=1-related. For the {110} interface plane, in particular, there are equal numbers of GaGa and As-As anti-site bonds across the interface. The equilibrium distance between two atoms of the same kind crossing the boundary is expected to be different from the length of normal GaAs bonds in the bulk. Therefore, the relative position of each grain on either side of an APB may be translated such that the boundary can have a lower energy situation. This translation does not affect the perfect Σ=1 coincidence site relationship. Such a lattice translation is expected for all high-angle grain boundaries as a way of relaxation of the boundary structure.

Determination of the Burgers vector of a dislocation in a Fe-Mn alloy by weak-beam image in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 330-331
Author(s):  
Y. Ishida ◽  
H. Ishida ◽  
K. Kohra ◽  
H. Ichinose
Keyword(s):  
High Order ◽  
Simulation Technique ◽  
The Other ◽  
Image Simulation ◽  
Diffraction Vector ◽  
Burgers Vector ◽  
Weak Beam ◽  
Beam Image ◽  
Edge Component

IntroductionA simple and accurate technique to determine the Burgers vector of a dislocation has become feasible with the advent of HVEM. The conventional image vanishing technique(1) using Bragg conditions with the diffraction vector perpendicular to the Burgers vector suffers from various drawbacks; The dislocation image appears even when the g.b = 0 criterion is satisfied, if the edge component of the dislocation is large. On the other hand, the image disappears for certain high order diffractions even when g.b ≠ 0. Furthermore, the determination of the magnitude of the Burgers vector is not easy with the criterion. Recent image simulation technique is free from the ambiguities but require too many parameters for the computation. The weak-beam “fringe counting” technique investigated in the present study is immune from the problems. Even the magnitude of the Burgers vector is determined from the number of the terminating thickness fringes at the exit of the dislocation in wedge shaped foil surfaces.

Procedures for the Quantitative Determination of Autoprothrombin C

1962 ◽  
Vol 08 (03) ◽  
pp. 434-441 ◽  
Author(s):  
Edmond R Cole ◽  
Ewa Marciniak ◽  
Walter H Seegers
Keyword(s):  
Quantitative Determination ◽  
Plasma Sample ◽  
Quantitative Measure ◽  
The Other ◽  
Clotting Time ◽  
Bovine Plasma ◽  
Autoprothrombin C

SummaryTwo quantitative procedures for autoprothrombin C are described. In one of these purified prothrombin is used as a substrate, and the activity of autoprothrombin C can be measured even if thrombin is in the preparation. In this procedure a reaction mixture is used wherein the thrombin titer which develops in 20 minutes is proportional to the autoprothrombin C in the reaction mixture. A unit is defined as the amount which will generate 70 units of thrombin in the standardized reaction mixture. In the other method thrombin interferes with the result, because a standard bovine plasma sample is recalcified and the clotting time is noted. Autoprothrombin C shortens the clotting time, and the extent of this is a quantitative measure of autoprothrombin C activity.

Determination of Factor XIII Activity and of Factor XIII Inhibitors Using an Ammonium-Sensitive Electrode

1983 ◽  
Vol 50 (02) ◽  
pp. 563-566 ◽  
Author(s):  
P Hellstern ◽  
K Schilz ◽  
G von Blohn ◽  
E Wenzel
Keyword(s):  
Factor Xiii ◽  
Normal Subjects ◽  
The Other ◽  
Activity Measurement ◽  
Factor Xiii Deficiency ◽  
Assay Procedure ◽  
Stabilization Factor ◽  
Release Method ◽  
Sensitive Electrode

SummaryAn assay for rapid factor XIII activity measurement has been developed based on the determination of the ammonium released during fibrin stabilization. Factor XIII was activated by thrombin and calcium. Ammonium was measured by an ammonium-sensitive electrode. It was demonstrated that the assay procedure yields accurate and precise results and that factor XIII-catalyzed fibrin stabilization can be measured kinetically. The amount of ammonium released during the first 90 min of fibrin stabilization was found to be 7.8 ± 0.5 moles per mole fibrinogen, which is in agreement with the findings of other authors. In 15 normal subjects and in 15 patients suffering from diseases with suspected factor XIII deficiency there was a satisfactory correlation between the results obtained by the “ammonium-release-method”, Bohn’s method, and the immunological assay (r1 = 0.65; r2= 0.70; p<0.01). In 3 of 5 patients with paraproteinemias the values of factor XIII activity determined by the ammonium-release method were markedly lower than those estimated by the other methods. It could be shown that inhibitor mechanisms were responsible for these discrepancies.

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