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S C. HT9;E  Me E
SCHEME
FOR THE
QUALITATIVE DETERMINATION
OF
SUBSTANCES
BY THE
BLOWP -I P E.
BY
T. EGLESTON, E. M.
Professor of Mineralogy and Metallurgy.
NEW YORK:
1872.




The substance may contaiq As-Sb; S — S-Se -FeMn-Cn-Co-Xi.i-tb-Bi —Ag -Au-HgZn Cd-Sn -Cl — I —C- Si-N —i, &c.
1.  Treat on Ch. in the 0. F. to find volatile substances such as As -Sb-S-Se-Pb-Bi -A/g  -CC., &c. p. 66 et seq.*
a.  Ift there  are  volatile  b.  It' there are  no volsubstances  present, form   atile  substancss  present.
a 6oating and test iWtvith  divide a part o/ the subS.Ph. and tin on Ch. for Sb,  stesnceinto  three portions
p. 99, or  to distinuish be-  and proceed as in  A.
tween Pb and Bi,..,p. 280.
a Yellow coat, yieldingr with S. Ph. a black' bead; disappearing
with blue flama nao part of it yielding grean Sb flame;       b and
b Yell)w cat, -generally with white border, yielding black or grey
beal with S. Ph, disappearing with blue flame; also the border
dLsappearing with green flame; Pb and Sb.
a Yellow coat, very similar to b but yielding no blue flame; Bi and
Sb.
2.  If As-Sb-S-Se  are present, roast a  large
quantity  thoroughlly   on Ch. p. 77.  Divide the substance into three portions, and proceed as in A.
A.  TfrEiTNENT OF THE  FIRST-:PoRTION. —Dissolve  a
very small quantity in borax on platinum  wire in the
O. F. and observe the color'produced. Various colors will be formed by the combination of the oxides.
Saturate the bead and shake it off into the porcelain
dish, repeat this once or twice. p. 79.
* These numbers refer to the pages of Plattner's Manual, translated by H. B. Cornwall,
187a.




a.  Treat these beads on COh. with a small piece of lead
silver, or   ld, in  a stong' R. F. p. 113.
b. Fe —Mn-Co-&c., c. Ni —-Cu Ag-ALe —
remain  in  the  bead.  p.  Sn-Pb —Bi are reduced
115.                            and collected by the lead
If the bead spreads out on the  button. p. 115.
COh., it must be collected to a   em-ve. the lead button from
globule by continued blowlng.
globule by. continued bn.  the bead while hot, or by breaking
Make a borax bead on platinum  the latter, when;cold, on the anvil
wire and dissolve in it sonme of
the fmnt of the bead, resev-  between paper, carefully preserving the rest for accidents.   ilg all the fragments.
d.  If Co is present, the  e.  If no Co  is present,
bead will be blue.            the bead will be  almost
If a large amount of Fe is pres-  colorless.
ent, add a little borax to prove the    Look here for Cr, Ti, 1,o
presence or absence of Co. l. I   o).,  eW V, Ta.
If 22.    is present,the bead
when treated on platinum wire in
the 0. F. will become dark violet
or black.
f. Treat the button  c on Ch. in the 0. F. until all
the lead, &c. is driven  off; Ni, Cu, Ag, Au  remnaining behind; or separate the lead with boracic acid.
p. 442.
g.  Treat the residue  g on Ch. in 0. F. with S.Ph.
bead, removino the button while the bead is hot.
h.  If Ni  and  Cu  are  i.  For Ag and Au make
present, the bead. will be. the special test No. 8;
green when  cold. p. 292.
If Ni only-yellow. If Cu
only-blue.
Prove  Cu by  treating
with tin on Ch in the R. F.
p. 293.
B.  TREATMENT OF THE SECOND PORTION. -Drive off the
volatile substances in the 0. F. on Ch.  Treat with the
R. F., or mix with soda, and then treat witlh-the R. F.,
for Z - 4 —  dlt S-n:.: —-If arwhite coating is formed, test
with  doblt:solution. pp. 251, 256, 276.




C.  TREATMENT OF THE THIRDPORTION.-Dissolve some
of the substance in S.Ph. on platinum wire in O. F.,
observing whether Si is present or not, and test for
M3n with nitrate of potassa. p. 210.
3.  Test for As with soda on Ch. in the R. F., or
with dry soda in a closed tubbs. p. 345 et seq.
4. Dissolve in S.Ph. on platinum wire in the 0. F.
(if the substance is not metallic and does not contain
any S.) and test for Sb on Ch. with tin, in the R. F.;.  Test for Se on Ch. p. 368.
6.  In absence of Se fuse with soda in the R. F. and
test for S on silver foil. p. 365. In presence of Se- test
for S in open tube. p. 366.
7.  Test for Bg Mfith dry soda in a closed tube. p. 304.
e.  Mix some of the substance with assay lead and
borax glass and fuse on COh. in the R. F. p. 401. Cupel
the lead button for Ag. p. 407. Test with nitric acid
for Au. p. 320.
9.   Test for C, Br -and I with a bead of S.Ph.
saturated with oxide of copper. pp. 373, 374, 375.
1X.  Test for Ci or Br with bisulphate of potassa.
p. 374.
1 A.  Test for H  in a closed tube. p. 353.
EL. Test on platinum  wire, or in platinum pointed
forceps, for coloration of the flame. p. 72 et seq.
13.  Test for e with hydrochloric acid. p. 360.
14.  Test for N with bisulphate of potassa. p. 354.
15. Test for Te in an open tube. p. 351;