IC Pak Anion

Fig. 3-62. Separation of inorganic anions using potassium hydrogenphthalate as the eluent. — Separator column Waters IC-PAK Anion eluent 0.001 mol/L KHP, pH 7.0 flow rate 2 mlVmin detection direct conductivity injection volume 10 pL solute concentrations 100 ppm each.

Fig. 3-126. Comparison of the conductivity change resulting from a pure concentration gradient (A) with that obtained under isoconductive conditions (B). - Separator column Waters IC-Pak Anion eluent see Fig. 3-23 (taken from [135]).

Fig. 3-127. Separation of various inorganic anions with an isoconductive eluent. - Separator column Waters IC-PAK Anion eluent see Table 3-23 (eluent switching at the time of injection) detection direct conductivity injection volume 100 pL solute concentrations 1 ppm fluoride (1), 2 ppm carbonate (2) and chloride (3), 4 ppm nitrite (4), bromide (5), and nitrate (6), 6 ppm orthophosphate (7), 4 ppm sulfate (8) and oxalate (9), 10 ppm chromate (10), and molybdate (11) (taken from [135]).

Sample hydrolyzed with 2 mol I. TFA, 6h, 100 C (extraction efficiency 92%) three AE separation conditions applied (1) Waters IC-Pak Anion HR with carbonate mobile phase at pH 10 (2) Dionex AS7 and AG7 with HNO3 (pH 1.8) and (3) Hamilton PRP-XlOO with phosphate-based mobile phase at pH 6.3... 

Figure 12.5 Separation of a seven-anion standard with single-column ion chromatography. Column [Chromatographic conditions IC-Pak Anion HR, 4.6 mmx7S mm. Waters Corp. Eluent borate/gluconate. Sample seven-anion standard (1) fluoride (2) bicarbonate (3) chloride (4) nitrite (S) bromide (6) nitrate (7) phosplmt (8) suUite. Detection conductivity. (Qiromatogram courtesy of Waters Corp.)...

Figure 3.140 Separation of inorganic anions detection nonsuppressed conductivity injec-using a potassium hydrogen phthalate eluent, tion volume 10pL peaks lOOmg/L each of Separator column Waters IC-PAK Anion elu- fluoride (1), chloride (2), nitrite (3), bromide ent 1 mmol/L KHP, pH 7 flow rate 2 mlVmin (4), nitrate (5), sulfate (6), and iodide (7).

Figure 3.207 Separation of various inorganic anions with an isoconductive eluent. Separator column Waters IC-PAK Anion eluent see Table 3.28 (eluent switching at the time of injection) detection nonsuppressed conductivity injection volume lOOpL peaks 1 mg/L fluoride (1), 2 mg/L each of carbonate (2) and...

Column. A Waters IC-PAK A or equivalent anion exchange column, operating at ambient temperature. Equilibrate the column with the mobile phase (eluant) by allowing the latter to flow through the column for 1 hour. 

Flgure 3.22 Indirect conductivity detection of (a) anions, using a TSK-GEL 620 SA column with 2 mM KOH as the eluent, and (b) cations, using an IC-PAK C column with 2 mAf HN03 as the eluent. (Reprinted from Ref. 51 with permission.)... 

Figure 24-4, Chromatograms obtained with optimized phthalate eluents. A, Vydac 242IC 4.6 B, Interaction ION-100 C, Hamilton PRP-XlOO D, Bio-Gel TSK IC-Anion-PW E, Waters IC Pak A.

Armed with several anion-exchange columns and an eluent solution of 2.0 mM KHP (pH 5.0), Siriraks et al. set out to determine why the elution order they observed (Zn-Pb-Cu) was different than that reported by Jenke and Pagenkopf [20]. They studied the chromatographic behavior of Pb(II), Zn(II), and Cu(II) on four different anion-exchange columns in an attempt to elucidate the mechanism of retention for the three cations. The following columns were used in the study silica-bonded from Vydac (302.IC) polystyrene-divinylbenzene (PS-DVB) from Hamilton (PRPX-100) pol)miethacrylate from Waters (IC-Pak) and a latex agglomerated PS-DVB from Dionex (AS-4). 

Work by Ruiz et al. in the analysis of water soluble inorganic phosphates in vegetables, such as tomato, lettuce, marrow, mushroom, celery, cauliflower, chard, onion, carrot, used SPE with Sep-Pak C18 cartridges for removal of organic compounds prior to IC analysis. Spiro and co-workers studied the kinetics of extraction of inorganic anions, including phosphate, from different types of tea into water. 

Separator PRP-X100 PRP-XllO LCAAOl Excel Pak ICS-A23 AN1 AN300 Star Ion A300 IC Anion... 

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