Separator Metrosep

Separator Metrosep A Metrosep A Metrosep A Metrosep A Metrosep A Metrosep A Metrosep A... 

For the separation and quantification of the cations and anions, a Metrohm AG ion chromatograph (1C), was utilized. The ions analyzed were lithium (Li", sodium (Na" ), ammonium (NILj ), calcium (Ca " ), magnesium (Mg " ), potassium (K ), fluoride (F ), chloride (Cl ), nitrite (N02 ), nitrate (3 ), phosphate (P04 ) and sulphate (S04 ). The instmment was equipped with a 733 IC analytical separation systems, a 732 IC detector, 709 IC pump, 753 Suppressor module and a 750 Auto sampler. A Metrosep Anion Dual 2 column is used for anion detection with the suppressor module at a flow rate of 0.8 ml min while Metrosep C2-100 is used for the cation detection without the suppressor unit at a flow rate of 1.0 ml min Before doing the ion analysis, the IC was calibrated using a series of standard solutions of different concentrations containing the same ion. 

Over the past 5 years, Metrohm (Herisau, Switzerland) also developed a number of surface-aminated PS/DVB-based resins. Metrosep A Supp 1 is a medium-capacity universal anion exchanger with a special selectivity in that bromide elutes behind nitrate. It is predominantly used both for anion analysis in samples with large concentration differences and for separating oxyhalide ions such as bromate, chlorite, and chlorate. 

Metrosep A Supp 1 HS is a special separator, which has been developed for rapid analysis of orthophosphate in cola soft drinks. Its short length of 50 mm and very low ion-exchange capacity also allow rapid analysis of some common inorganic anions in weakly contaminated sample matrices. The corresponding hyperbranched polymer, the lonPac Fast Anion IIIA (see Section 3.4.3), which has been developed for the same application, is more robust due to its chemistry and standard length of 250 mm. Moreover, it elutes citrate faster and can, therefore, be applied for analyzing diet cola drinks, too. 

With Metrosep A Supp 8 Metrohm offers a special ultrahigh-capacity ion exchanger for the separation of UV-absorbing anions such as bromide, nitrite, and nitrate in brine solutions utilizing a sodium chloride eluent. 

Figure 3.9 Separation of common inorganic anions on Metrosep A Supp 3. Eluent 1.7 mmol/L NaHCOs + 1.8 mmol/L Na2C03 flow rate 1 ml7min detection suppressed conductivity injection volume 20 pL peaks ...

Metrosep A Supp 15 is a mediuni Capacity universal anion exchanger designed for high mechanical and chemical stability. Therefore, this separator column can be used for standard applications as well as for highly complex separation problems. It exhibits a special selectivity to separate glycolate, formate, and acetate to baseline under isocratic conditions being illustrated in Figure 3.10. 

Figure 3.21 Separation of common inorganic anions on Metrosep Anion Dual 2. Eluent ...

Separator TSK-Gel > LCA A03 Shimpack Polyspher Super-Sep Metrosep Allsep Anion Allsep A-2 MCI SCA04... 

Figure 3.26 Separation of common inorganic 3 mg/L chloride (4), system peak (5), 10 mg/L anions and oxyhalides on Metrosep A Supp 7. nitrite (6), 10 mg/L bromide (7), 20 mg/L Eluent 3.6 mmol/L Na2C03 flow rate 0.7 mL/ chlorate (8), 5 mg/L dichloroacetate (9), min detection suppressed conductivity 10 mg/L nitrate (10), 20 mg/L orthophosphate...

Figure 3.162 Separation of fluoride, acetate, and formate from other inorganic and organic anions under isocratic conditions. Separator column Metrosep A Supp 5 eluent 3.2 mmol/L Na2C03 -I-1 mmol/L NaHC03,- flow rate 0.7 mL/ min detection suppressed conductivity injection volume 20 pL peaks 5 mg/L fluoride (1),...

Separator CarboPac CarboPac CarboPac CarboPac CarboPac CarboPac CarboPac Metrosep Metrosep... 

Figure 3.214 Isocratic separation of sugar alcohols, anhydrosugars, and glucose. Separator columns Metrosep A Supp 15-1- Metrosep Carb 1 column dimensions 150 mm x 4 mm I. d. (Metrosep A Supp 15) and 250 mm x4 mm i.d. (Metrosep Carb 1) column temperatures ...

Figure 3.215 Isocratic separation of sugar alcohols, anhydrosugars, and mono- and disaccharides. Separator column Metrosep Carb 2 column dimensions 150 mm x 4 mm i.d. column temperature 45 °C eluent lOmmol/L NaOH flow rate 1 mL/min detection pulsed amperometry on a gold working electrode Injection volume lOOpL peaks 0.64 mg/L...

Figure 434 Separation of common inorganic detection nonsuppressed conductivity peaks cations on Metrosep C3. Column dimensions 1 mg/L lithium (1), 5mg/L sodium (2), 5mg/L...

Cation exchangers based on PBDMA-coated silica are offered by a number of companies. Metrohm (Herisau, Switzerland), for example, offers two columns under the trade names Metrosep Cl and C4. The 5 pm Metrosep Cl is considered to be the high-performance column for the simultaneous analysis of mono-and divalent cations with an analysis time of less than 20 min. It can also be used for the separation of various amines, which are typically eluted with a nitric acid eluent. Figure 4.41 shows an example chromatogram obtained under standard chromatographic conditions with an eluent mixture of tartaric acid and pyridine-2,6-dicarboxyiic acid (PDCA) (dipicohnic acid). Under these chromatographic conditions, calcium elutes ahead of magnesium, followed by strontium and barium. This unusual retention behavior can be attributed to the complex-ing properties of pyridine-2,6-dicarboxylic acid. With a pure tartaric acid eluent. 

Figure 4.41 Simultaneous separation of alkali metals, alkaline-earth metals, and ammonium on Metrosep Cl. Column dimensions 125mmx 4.6 mm i.d. eluent 5 mmol/L tartaric add -l-1 mmol/L pyrldlne-2,6-dicarboxylic add-l-...

Metrosep Organic Acids Metrohm 250x7.8 100x7.8 9 5 Sulfonate groups High-performance separator for weak inorganic and organic acids... 

Figure 5.4 Separation of short-chain fatty acids on Metrosep Organic Acids. Eluent ...

Figure 5.5 Separation of various mono- and dicarboxylic acids on Metrosep organic acids. Eluent 05 mmol/L sulfuric acid/acetone (90 10 v/v) flow rate 05 mL/min detection non-suppressed conductivity injection volume ...

Figure 10.9 Cation analysis of a rain water sample. Separator column Metrosep Cation 1 -2 eluent 4 mmol/L tartaric acid +1 mmol/L pyridine-2,6-dicarboxylic acid flow rate 1 ml/ min detection nonsuppressed conductivity ...

Figure 10.17 Amperometric detection of nitrite at trace level. Separator column Metrosep Anion Dual 2 eluent 2mmol/L...

Figure 10.31 Separation of bromate at trace level in a mineral water sample according to ISO 11206 using a sulfuric acid eluent Separator column Metrosep A Supp 16 column dimensions 100 mm x 4 mm i.d. column temperature 45 °C eluent 100 mmol/L H2SO4...

Figure 10.77 Anion and cation analysis of aerosol particles (PM 2.5) In an outside air sample, (a) Anion analysis - separator column Metrosep A Supp 5 column dimensions ...

Figure 10.105 shows the separation of common inorganic anions in a coohng water sample suppressed conductivity detection was used. A Metrosep Anion Dual 2 anion exchanger was selected as the stationary phase, with a carbonate/ bicarbonate mixture as an eluent The sample to be analyzed was diluted 1 10 with deionized water. 

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