Dionex CRD碳酸盐去除装置
Thermo Scientific的戴安™酸盐去除装置(CRD 180,200和300)从抑制洗脱液流通过扩散通过碳酸酯的选择性透气膜的壁除去二氧化碳。与碳酸洗脱液系统的戴安CRD 300降低了背景信号,以几乎相同的水平作为氢氧化物洗脱液。抑制器后铅垂,二氧化碳传输是由碱性溶液的逆流辅助。
戴安CRD 180和200用于从氢氧化物洗脱液系统中除去碳酸优化
尽量减少使用戴安CRD 180或200可以提高量化碳酸盐
戴安CRD 180的减小的膜长度为根据4微米树脂柱优化
戴安CRD 300的增加的膜长度为碳酸盐淋洗液系统进行了优化
减少与戴安CRD 300结果基线为碳酸盐淋洗液系统更高的灵敏度
与一戴安CRD 300碳酸背景消除增加了线性范围
Dionex CRD碳酸盐去除装置
订货信息:
CRD 180 (0.4 mm) | 079960 |
CRD 200 (4 mm) | 062983 |
CRD 200 (2 mm) | 062986 |
CRD 200 (0.4 mm) | 072054 |
CRD 300 (4 mm) | 064637 |
CRD 300 (2 mm) | 064638 |
CRD 300 (4 mm) with Peristaltic Pump Kit | 064905 |
CRD 300 (2 mm) with Peristaltic Pump Kit | 064906 |
Santoprene Tubing for Peristaltic Pump | 068518 |
Ship Kit for Peristaltic Pump/CRD 300 | 064911 |
CRD 300 (4 mm) with VP Vacuum Pump Kit | 068475 |
CRD 300 (2 mm) with VP Vacuum Pump Kit | 068474 |
Reduces Carbonate for Improved Sensitivity
The Thermo Scientific™ Dionex™ Carbonate Removal Device
(CRD 180, 200 and 300) remove carbon dioxide from the suppressed eluent stream
by diffusion through the walls of a carbonate selective gas permeable membrane.
With carbonate eluent systems the Dionex CRD 300 reduces the background signal
to nearly the same levels as that of hydroxide eluents. Plumbed after the
suppressor, the carbon dioxide transfer is aided by a countercurrent flow of
basic solution.
The Dionex CRD 180 and 200 are optimized for the removal of carbonate from
hydroxide eluent systems
Minimizing carbonate using the Dionex CRD 180 or 200 can improve
quantification
The reduced membrane length of the Dionex CRD 180 is optimized for columns
based on 4 μm resins
The increased membrane length of the Dionex CRD 300 is optimized for
carbonate eluent systems
Reducing the baseline with a Dionex CRD 300 results in higher sensitivity
for carbonate eluent systems
Elimination of the carbonic acid background with a Dionex CRD 300 increases
the linearity range
Dionex CRD 200 Carbonate Removal Device
Exposure to carbon dioxide can cause samples to become contaminated with
carbonate. High levels of carbonate originating from dissolved carbon dioxide
can interfere with the accurate determination of analytes of interest, such as
sulfate and nitrite. The Dionex CRD 200 is a device used to remove the carbonate
peak contributed by the sample.
The Dionex CRD 200 can be installed easily in any Thermo Scientific Dionex
IC system equipped with an eluent generator, Thermo
Scientific Dionex CR-ATC Continuously Regenerated Anion Trap Column, and Thermo
Scientific™ Dionex™ AERS™ 500 Anion
Electrolytically Regenerated Suppressor or Thermo
Scientific™ Dionex™ ACES™ 300 Anion Capillary
Electrolytic Suppressor, and requires no reagents or software control. The
Dionex CRD 200 is a low-dispersion devices designed specifically for use with
hydroxide- and borate-based chemistries using Thermo Scientific Dionex
columns.
The Dionex CRD 200 is available in three formats. The Dionex CRD 200 (4 mm)
supports carbonate removal from standard bore systems, while the Dionex CRD 200
(2 mm) supports carbonate removal from microbore systems; the Dionex CRD 200
(0.4 mm) supports carbonate removal from capillary-scale systems at flow rates
of 5 – 30 μL/min.
A significant amount of carbonate is removed using the Dionex CRD 200
Carbonate Removal Device.
Dionex CRD 300 Carbonate Removal Device
Carbonate eluents are suppressed to relatively low-conductivity carbonate
acid, but the residual conductivity of the carbonic acid has several undesirable
effects. Carbonic acid can mask small peaks, decreasing the limit of detection
(LOD) during trace analyses. In a background of carbonic acid, the linear range
of most species is limited, and the residual background conductivity creates a
large void dip which can hamper the integration of early eluting species. The
CRD 300 is a device used to remove the carbonic acid from the suppressed eluent,
providing hydroxide-like detection to systems using carbonate eluents.
The Dionex CRD 300 can be installed easily in any Dionex IC system running
carbonate as an eluent with a Dionex AERS 500 suppressor. The Dionex CRD 300
requires either a constant flow of basic solution from a peristaltic pump or
evacuation by a vacuum pump. The Dionex CRD 300 is designed specifically for use
with carbonate eluent based chemistries using Dionex columns.
The Dionex CRD 300 is available in two formats. The Dionex CRD 300 (4 mm)
supports carbonate removal from standard bore systems, while the Dionex CRD 300
(2 mm) supports carbonate removal from microbore systems.
Background signal is reduced using the Dionex CRD 300 Carbonate Removal
Device.
Dionex CRD 180 Carbonate Removal Device
The Dionex CRD 180 is a version of the Dionex CRD 200 that has reduced
internal volume. This facilitates operation in conjunction with 4 μm resin
packed capillary columns without unacceptable loss of peak efficiency. However
the Dionex CRD 180 has less capacity for the removal of carbonate than the
Dionex CRD 200, and is therefore not recommended for use with columns packed
with resin larger than 4 μm.
The Dionex CRD 180 can be installed easily in a Dionex
Capillary IC system equipped with an eluent generator, Dionex CR-ATC
Continuously Regenerated Anion Trap Column, and Dionex ACES 300 suppressor. The
Dionex CRD 180 requires no reagents or software control. The Dionex CRD 180 is
an ultra-low-dispersion device designed specifically for use with
hydroxide-based chemistries using Dionex columns.
The Dionex CRD 180 is only available in capillary (0.4 mm) format for use
with 0.25 mm and 0.4 mm capillary columns. Microbore and standard-bore systems
using 4 μm resin packed columns should use the Dionex CRD 200.
Dionex Carbonate Removal Device CRD 180 Specifications |
---|
Hardware Dimensions ( h × w × d) | 11.3 cm × 9.3 cm × 2.1cm (4.5 in. × 3.7 in. × 0.8
in.) |
Void Volume
| 0.4 mm: ~1 μL |
Dionex Carbonate Removal Device CRD 200 Specifications |
---|
Hardware Dimensions ( h × w × d) (4 mm and 2 mm) | 2.0 cm × 4.4 cm × 7cm (0.8 in. × 1.7 in. × 2.8 in.) |
Hardware Dimensions ( h × w × d) (0.4 mm) | 11.3 cm × 9.3 cm × 2.1cm (4.5 in. × 3.7 in. × 0.8
in.) |
Void Volume
| 2 mm: ~40 μL 4 mm: ~200 μL 0.4 mm: ~2
μL |
Dionex Carbonate Removal Device CRD 300 Specifications |
---|
Hardware Dimensions ( h × w × d) | 2.0 cm × 4.4 cm × 7cm (0.8 in. × 1.7 in. × 2.8 in.) |
Void Volume
| 2 mm: 80 μL 4 mm: 225 μL |
Product Data Sheets |
---|
| Carbonate
Removal Device CRD 180 and 200 for RFIC Systems |
| Carbonate
Removal Device 300 (CRD 300) for Carbonate Eluents Data
Sheet |
Product Manuals |
---|
| Carbonate
Removal Device CRD 180 and 200 Manual |
| Carbonate Removal
Device CRD 200 Quickstart |
| Carbonate Removal
Device CRD 300 Manua |
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