Specifications

24
Conductivity Detector
When used with a CTO-20AC, expansion to a full suppressor system can be realized by adding the
suppressor option. Suppressor functions can be disabled when necessary, making it possible to
switch between anion analysis using a suppressor system and cation analysis using a
non-suppressed system. In addition to a single flow-line system, expansion to a dual flow-line
system is also possible, allowing the creation of a variety of system configurations. For example,
simultaneous analysis of anions and cations using a combination of suppressed and
non-suppressed detection is possible.
Shimadzu’s post-column pH-buffered electroconductivity method (Patent No. 2017498) enables
selective, high-sensitivity analysis of organic acids. Even samples that traditionally require
time-consuming pretreatment to handle unwanted constituents can be analyzed after simple
pretreatment procedures such as dilution and filtration. The level of reliability attained in
quantitative analysis is much higher than that attained conventionally with a low-wavelength UV
method or a simple conductivity method. Superior linearity enables batch analysis in cases where
constituent concentrations differ greatly and, consequently, helps reduce analysis time.
The sensitivity of detectors that monitor weak electrical signals from analytes is affected by the
inherent electrical noise of the detector itself. With the CDD-10AVP, electronic parts with low
electrical noise are used, and the layout of the electronic components has been optimized in order
to reduce noise levels, thereby attaining an extremely high level of sensitivity. Combining the
CDD-10AVP with a suppressor unit makes it possible to perform ultra-high sensitivity ion analysis
on the order of 0.25 µg/L (detection limit: S/N = 3) for Cl
−
.
Reproducibility in Anion Analysis
(Lower concentration limits of quantitative analysis range
for 2001 edition of Water Supply Testing Methods, Japan)
Ions
F
Cl
NO
2
Br
NO
3
PO
4
SO
3
Concentration (µg/L)
50
200
15
100
80
500
200
RSD (%)
0.46
0.23
5.41
0.71
0.54
0.63
2.30
0102030min
1
2
3
4
5
6
7
8
9
10
11
12
Peaks
1. Phosphoric acid
2. Citric acid
3. Pyruvic acid
4. Malic acid
5. Succinic acid
6. Lactic acid
7. Formic acid
8. Acetic acid
9. Levulinic acid
10. Pyroglutamic
acid
11. Iso-butyric acid
12. n-butyric acid
Temperature coefficient
Cell volume
Cell constant
Material used in parts making contact with liquid
Maximum operating pressure
Response
Zero adjustment
Operating temperature range
Dimensions, weight
Power requirements
CDD-10AVP (228-45054-xx)
25 nS·cm
−1
/C (background: 285 µS·cm
−1
; cell temperature: 43°C)
0.25 µL
25 µS·cm
−1
PEEK, SUS316
2.9 MPa (30 kgf/cm
2
)
0.05 to 10 sec., 10 steps
Autozero, baseline shift
4 to 35°C
W260 × D420 × H140 mm, 6.0 kg
AC110 VA, 230 V, 250 VA, 50/60 Hz
Specifications
CDD-10AVP
The CDD-10AVP conductivity detector achieves an even higher level of sensitivity and makes it
possible to perform a wide variety of analysis scenarios with a single unit. An option card
enables the simultaneous 2-channel measurement of anions and cations, and a suppressor
option allows expansion to a suppressor system for ultra-high sensitivity work. Organic acids
can be analyzed using Shimadzu’s unique post-column pH-buffered electroconductivity method.
Handles a Wide Variety of Analysis Options
Perform Analysis with Highest Sensitivity
Applicable to Both Suppressor and Non-Suppressor
Systems
(available in limited regions)
High-Sensitivity Analysis of Organic Acids