 |
|||
|
Page Title:
Preparation of calibration curve |
|
||
| ||||||||||
|
|  MIL-P-670A
(b) Preparation of calibration curve. Transfer 0.5, 1.0, 1.5,
2.1, 2.5, and 3.0 ml, of standard iron solution to 100 ml. volumetric
flasks and add 35 ml. of water.
Carry along a reagent blank. Add 10 ml.
of hydroxylamine hydrochloride solution (5 percent) and allow to stand
for 15 minutes.
Add 10 ml. of ortho-phenanthroline solution (0.2 percent)
and 15 ml. of sodium citrate solution (20 percent) and dilute to the mark.
Allow to stand for 1 hour and measure the transmittance at 510 millimicrons
with a spectrophotometer that has been set to 100 percent transmittance
with the reagent blank.
Plot mg. of iron against percent transmittance on
semi-log paper.
13
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals