Acetylene, The Principles Of Its Generation And Use by F. H. Leeds

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Acetylene, The Principles Of Its Generation And Use by F. H. Leeds
Book, page 362 / 445

|28.7 | 0.931 | 0.925 | 0.920 | 0.915 | 0.909 |
|28.8 | 0.934 | 0.929 | 0.924 | 0.918 | 0.913 |
|28.9 | 0.937 | 0.932 | 0.927 | 0.921 | 0.916 |
|29.0 | 0.941 | 0.935 | 0.930 | 0.925 | 0.919 |
|29.1 | 0.944 | 0.939 | 0.933 | 0.928 | 0.923 |
|29.2 | 0.947 | 0.942 | 0.937 | 0.931 | 0.926 |
|29.3 | 0.950 | 0.945 | 0.940 | 0.935 | 0.929 |
|29.4 | 0.954 | 0.949 | 0.943 | 0.938 | 0.932 |
|29.5 | 0.957 | 0.952 | 0.947 | 0.941 | 0.936 |
|29.6 | 0.960 | 0.955 | 0.950 | 0.944 | 0.939 |
|29.7 | 0.964 | 0.959 | 0.953 | 0.948 | 0.942 |
|29.8 | 0.967 | 0.962 | 0.957 | 0.951 | 0.946 |
|29.9 | 0.970 | 0.965 | 0.960 | 0.954 | 0.949 |
|30.0 | 0.974 | 0.968 | 0.963 | 0.958 | 0.952 |
|30.1 | 0.977 | 0.972 | 0.966 | 0.961 | 0.955 |
|30.2 | 0.980 | 0.975 | 0.970 | 0.964 | 0.959 |
|30.3 | 0.984 | 0.978 | 0.973 | 0.968 | 0.962 |
|30.4 | 0.987 | 0.982 | 0.976 | 0.971 | 0.965 |
|30.5 | 0.990 | 0.985 | 0.980 | 0.974 | 0.969 |
|_____|_______|_______|_______|_______|_______|

For the detection of phosphine, Berge's solution may be used. It is a
"solution of 8 to 10 parts of corrosive sublimate in 80 parts of water
and 20 parts of 30 per cent. hydrochloric acid." It becomes cloudy when
gas containing phosphine is passed into it. It is, however, applied most
conveniently in the form of Keppeler's test-papers, which have been
described in Chapter V. Test-papers for phosphine, the active body in
which has not yet been divulged, have recently been produced for sale by
F. B. Gatehouse.

The estimation of phosphine will usually require to be carried out either
(1) on gas directly evolved from carbide in order to ascertain if the
carbide in question yields an excessive proportion of phosphine, or (2)
upon acetylene which is presumably purified, drawn either from the outlet
of the purifier or from the service-pipes, with the object of
ascertaining whether an adequate purification in regard to phosphine has
been accomplished. In either case, the method of estimation is the same,
but in the first, acetylene should be specially generated from a small
representative sample of the carbide and led directly into the apparatus
for the absorption of the phosphine. If the acetylene passes into the

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