CHEM 264
ANALYTICAL CHEMISTRY
CHEAT SHEET SUMMARY
, I
substance kind of matter that
any
:
has definite composition
solute :
substance that gets dissolved mean : = CI =
5
+
solvent :
substance that does the
Median :
Middle value
dissolving
E
case 1 :
+=
=
& (i 5)
solution the
homogenous mixture
-
: i =,
: O =
formed when a solute dis-
standard deviation N -
1
solves a solvent
o2= (i 5)
=
-
-
variance
=
,
molarity the number of mole
:
case 2 t
:
substance N -
1
:
per litre of
(
solution
RSD :
relative standard deviation
c = mol .
dm-/M
S
spredd : difference between
substance
largest case 3 :
F =
the number of
molality moles
:
& smallest value in dataset
per kg solvent
t-test accura
c
:
b = Mol .
kg
-
F- test :
precision
mass substance
PDb X109 Ketone if C-H stretches
1ug/L ↑ no
=
=
total sample
mass substance alde
hyde weak stretch of 2300 cm" (C H)
:
PPM x106
-
=
1mg/L Carbonyls strong
=
total sample
:
stretch@f 1700 <m
0)
+
(c =
alcohol broad Stretch@f
(0 H)
:
3200 -
3400 cm-1 .
percentage composition
HC= 3300CM" H-C =
3100 Cm
+
HC -
-
2900 cm
+
Wt % =
mass solute
(g) X100 SP2/SP CH >3000CM
(g) <3000CM
:
total mass of solution Sp3CH :
C = C 2150 CM" C =
C 1650 CM-
volume solute (L) C C
-
1200 Cm-
V%
esters ethers alcohol
=
X 100 carb acid
total vol of solution (L) strong
:
, , , c. O
Stretch@ 1000 -
1300 CM
how close values are to true
accuracy
:
aromatics medium Stretch & 1400
(2 peaks)
:
values -
1600 cm"
precision :
how close repeated measure amine :
medium Stretch & 3400
ments are together nitrile :N medium
O 2250
types of error
IR SPECTROSCOPY
random/indeterminate error
systematic/determinate
:
error :
affects precision can be minimized
affectsaccuracy ident a
, :
by repeated measurements
CHEMOMETRICS SPECTROSCOPY
ANALYTICAL CHEMISTRY
CHEAT SHEET SUMMARY
, I
substance kind of matter that
any
:
has definite composition
solute :
substance that gets dissolved mean : = CI =
5
+
solvent :
substance that does the
Median :
Middle value
dissolving
E
case 1 :
+=
=
& (i 5)
solution the
homogenous mixture
-
: i =,
: O =
formed when a solute dis-
standard deviation N -
1
solves a solvent
o2= (i 5)
=
-
-
variance
=
,
molarity the number of mole
:
case 2 t
:
substance N -
1
:
per litre of
(
solution
RSD :
relative standard deviation
c = mol .
dm-/M
S
spredd : difference between
substance
largest case 3 :
F =
the number of
molality moles
:
& smallest value in dataset
per kg solvent
t-test accura
c
:
b = Mol .
kg
-
F- test :
precision
mass substance
PDb X109 Ketone if C-H stretches
1ug/L ↑ no
=
=
total sample
mass substance alde
hyde weak stretch of 2300 cm" (C H)
:
PPM x106
-
=
1mg/L Carbonyls strong
=
total sample
:
stretch@f 1700 <m
0)
+
(c =
alcohol broad Stretch@f
(0 H)
:
3200 -
3400 cm-1 .
percentage composition
HC= 3300CM" H-C =
3100 Cm
+
HC -
-
2900 cm
+
Wt % =
mass solute
(g) X100 SP2/SP CH >3000CM
(g) <3000CM
:
total mass of solution Sp3CH :
C = C 2150 CM" C =
C 1650 CM-
volume solute (L) C C
-
1200 Cm-
V%
esters ethers alcohol
=
X 100 carb acid
total vol of solution (L) strong
:
, , , c. O
Stretch@ 1000 -
1300 CM
how close values are to true
accuracy
:
aromatics medium Stretch & 1400
(2 peaks)
:
values -
1600 cm"
precision :
how close repeated measure amine :
medium Stretch & 3400
ments are together nitrile :N medium
O 2250
types of error
IR SPECTROSCOPY
random/indeterminate error
systematic/determinate
:
error :
affects precision can be minimized
affectsaccuracy ident a
, :
by repeated measurements
CHEMOMETRICS SPECTROSCOPY
