An automatic apparatus for the quantitative micro-determination of nitrogen

The Analyst ◽  
1957 ◽  
Vol 82 (978) ◽  
pp. 643 ◽  
Author(s):  
F. E. Charlton
Keyword(s):  
Automatic Apparatus

Automatic Apparatus for the Determination of Helium Diffusion in Solids

1971 ◽  
Vol 42 (5) ◽  
pp. 674-677 ◽  
Author(s):  
R. W. Crawford ◽  
J. W. Frazer ◽  
J. B. Holt
Keyword(s):  
Automatic Apparatus ◽  
Diffusion In Solids ◽  
Helium Diffusion

An automatic apparatus for the determination of titanium

The Analyst ◽  
1966 ◽  
Vol 91 (1081) ◽  
pp. 224 ◽  
Author(s):  
C. L. Denton ◽  
J. Whitehead
Keyword(s):  
Automatic Apparatus

634. The determination of the coagulating power of commercial rennet extracts using an automatic tester

1956 ◽  
Vol 23 (2) ◽  
pp. 269-276 ◽  
Author(s):  
F. C. Storrs
Keyword(s):  
Experimental Error ◽  
Freeze Drying ◽  
Milk Powder ◽  
Automatic Apparatus ◽  
Instrument Error ◽  
Single Observation ◽  
Rennet Coagulation ◽  
Freeze Dried ◽  
Two Samples

1. A method for preparing rennet reference standards by freeze-drying is described.2. A substrate has also been developed using ordinary spray dried separated milk powder which will give reproducible results under specified conditions. These include:(i) A constant temperature (37° C.) for the duration of the test.(ii) The exclusion of added calcium ions until actual testing begins.(iii) The equilibration of the milk at 37° C. for 2 hr. before use.3. The construction and use of an automatic apparatus for recording rennet coagulation time is also described.4. The instrument error of a single observation is about 1·0%.5. With liquid rennet extracts, the total experimental error, based on one sample of three replicates, is 2% or less: with two samples, it is 1% or less.6. With freeze-dried rennet preparations, the experimental error with two ampoules, sampled thrice with three replicates per sample, was ±2·.0%. With three ampoules it was ±1% or less.

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