Single-Stage Determination of Argon, Oxygen and Nitrogen in Air

1965 ◽  
Vol 3 (7) ◽  
pp. 242-243 ◽  
Author(s):  
E. L. Obermiller ◽  
R. W. Freedman
Keyword(s):  
Single Stage

Determination of the Pressure of the Barium I‐II Transition with Single‐Stage Piston‐Cylinder Apparatus

1967 ◽  
Vol 38 (12) ◽  
pp. 4557-4564 ◽  
Author(s):  
J. C. Haygarth ◽  
I. C. Getting ◽  
G. C. Kennedy
Keyword(s):  
Single Stage ◽  
Piston Cylinder

scholarly journals Observability of anammox activity in single-stage nitritation/anammox reactors using mass balances

2015 ◽  
Vol 1 (4) ◽  
pp. 523-534 ◽  
Author(s):  
Sarina Schielke-Jenni ◽  
Kris Villez ◽  
Eberhard Morgenroth ◽  
Kai M. Udert
Keyword(s):  
Heterotrophic Bacteria ◽  
Single Stage ◽  
Anammox Bacteria ◽  
Mass Balances ◽  
Microbial Kinetics ◽  
Anammox Activity

Theoretically, mass balances based on microbial kinetics allow the determination of the activity of anammox bacteria (AMX) and heterotrophic bacteria (HET). In practise, the variance of the resulting activities is too high.

Determination of the separation efficiencies of a single-stage cryogenic distillation setup to remove krypton out of xenon by using a 83mKr tracer method

2015 ◽  
Vol 86 (11) ◽  
pp. 115104 ◽  
Author(s):  
S. Rosendahl ◽  
E. Brown ◽  
I. Cristescu ◽  
A. Fieguth ◽  
C. Huhmann ◽  
...  
Keyword(s):  
Single Stage ◽  
Tracer Method ◽  
Cryogenic Distillation

Determination of portions of the bismuth III–V and IV–V equilibrium boundaries in single-stage piston-cylinder apparatus

1969 ◽  
Vol 7 (6) ◽  
pp. ii
Author(s):  
J.C. Haygarth ◽  
H.D. Ludemann ◽  
I.C. Getting ◽  
G.C. Kennedy
Keyword(s):  
Single Stage ◽  
Piston Cylinder

scholarly journals Development of non-aqueous single stage derivatisation method for the determination of putrescine and cadaverine using GC-MS

2008 ◽  
Vol 6 (2) ◽  
pp. 229-236
Author(s):  
M. Awan
Keyword(s):  
Gas Chromatography ◽  
Reaction Time ◽  
Capillary Column ◽  
Correlation Coefficients ◽  
Single Step ◽  
Single Stage ◽  
Gas Chromatograph ◽  
Ion Storage ◽  
Impact Ionisation

AbstractA single step derivatisation for the determination of putrescine and cadaverine by gas chromatography using trifluoroacetylacetone (TFAA) in methanol or ethanol was studied and optimised. The derivatives were analysed by an iontrap gas chromatograph-mass spectrometer (GC-MS) operating with electron impact ionisation with selective ion storage (EI-SIS) mode. The optimised mole ratios for TFAA/putrescine and TFAA/cadaverine reactions were 5/1 and 5.8/1 respectively with a reaction time of 15 minutes at 95oC. The retention times for the derivatised putrescine and cadaverine were 11.3 and 12.2 minutes respectively using the capillary column, CP-Sil 8CB; 30 m length x 0.25 mm i.d. x 0.25 mm film. The correlation coefficients (R2) of calibration curves for putrescine and cadaverine were 0.991 and 0.990 respectively over a concentration range of 100 ng cm−3 to 1500 ng cm−3. The method developed was found to be simple (single-stage derivatisation), rapid (15 minutes derivatisation & 14 minutes GC/MS run) and accurate (putrescine and cadaverine recoveries 94.8%–97.7%).

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