Allureâ¢ Acidix HPLC Column - Chromtech.com.au

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Restek -- LC/MS Columns Allure C18 Guard Cartridges: Dimensions 10 x 2.1mm 10 x 4.0mm 20 x 4.0mm cat.# 916450212 916450210 916450220 Qty. 3 3 2
Restek Advantage, Fall 2000: Ultra Aqueous C18 HPLC Column -- Reversed-phase analysis of polar compounds - RESTEK HOME - LIBRARY - RELATED PRODUCTS Fall 2000 Ultra Aqueous C18 HPLC Column Reversed-phase analysis of polar compounds by Terry Reid, HPLC R&D Chemist ● ● ● Permits use of highly aqueous mobile phases Enhanced retention and selectivity for polar analytes Excellent base deactivation Highly polar compounds such as short-chain organic acids, nucleotides, catecholamines, and water-soluble vitamins are difficult to retain using conventional reversed phase columns, even with little or no organic solvent in the mobile phase. The Ultra Aqueous C18 column enhances the retention of polar analytes, while maintaining a high level of base deactivation and a selectivity that is similar to a conventional C18 column. Six organic acids that are difficult to retain using many conventional C18 columns can be well retained on the Ultra Aqueous C18 column (Figure 1). The unique qualities of the Ultra Aqueous C18 column are apparent when comparing this column to the Ultra C18 column -- a highly retentive, welldeactivated, general-purpose C18 column -- in a separation of polar compounds. The Ultra Aqueous C18 column has very similar retention and selectivity to the Ultra C18 column when analyzing neutral, hydrophobic compounds. While phenol, a neutral polar compound, is retained similarly by both columns (Figure 2), the basic compound pyridine is retained approximately 2.5 times longer on the Ultra Aqueous C18 column. Also note that, in spite of its greater retention, pyridine elutes from the Ultra Aqueous C18 column as a relatively symmetrical peak (pyridine is commonly used as a test probe for column base deactivation). This proves that enhanced retention for polar compounds is achieved on the Ultra Aqueous C18 column without sacrificing base deactivation. The Ultra Aqueous C18 column is designed using Type B, high-purity silica, and a novel bonding chemistry that produces a true C18 phase (USP L1) with alkyl chains that remain completely extended, even when continually exposed to a highly aqueous mobile phase. This is because polar groups on the silica surface
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Page 13 and 14: RAS[TM] -- Allure[TM] Basix HPLC Co
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Page 23 and 24: Restek Advantage, Fall 2000: Ultra
Page 25 and 26: Restek -- HPLC Methods Development
Page 27 and 28: Restek -- HPLC Applications (PDF) H
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Page 31 and 32: Ascorbic Acid on Allure Acidix (LC
Page 33 and 34: Adenine Nucleotides on Allure Acid
Page 35 and 36: Acetaminophen on Allure Acidix Pea
Page 37 and 38: Ibuprofen and Naproxin on Allure A
Page 39 and 40: Tricyclic Antidepressants on Allure
Page 41 and 42: Ibuprofen and 1 Application Note:00
Page 43 and 44: Timolol Maleate on Allure Basix Pe
Page 45 and 46: Metoprolol on Allure Basix Peak Li
Page 47 and 48: Cyclobenzaprine on Allure Basix Pe
Page 49 and 50: Norethindrone and 1 Application Not
Page 51 and 52: Sertraline HCI on Allure Basix Pea
Page 53 and 54: Verapamil HCL on Allure Basix Peak
Page 55 and 56: Atenolol on Allure Basix Peak List
Page 57 and 58: Trycyclic Antidepressants Applicati
Page 59 and 60: Norgestrel and Application Note: LC
Page 61 and 62: Norgestrel and Ethynyl Estradiol on
Page 63 and 64: EPA Method 8330 Application Note:00
Page 65 and 66: Benzaldehyde, Hydrocortisone, and P
Page 67 and 68: Carbamates on Ultra IBD Peak List:
Page 69 and 70: Thymine, Thymidine, TTP, TDP, and T
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Cytosine, Cytidine, CTP, CDP, and C
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11 Component Mixture of Nucleotides
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LC/MS of Cephradine on Ultra IBD Ap
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Cephaloridine by Normal Phase on Ul
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Cephalexin and Cephradine on Ultra
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Digoxin on Ultra IBD Peak List: 1.
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Furosemide on Ultra IBD Peak List:
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Acids and Bases @ pH3 Application N
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Levothyroxine on Ultra PFP Peak Lis
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EPA 8330 on Ultra Cyano Peak List:
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Calcium Channel Blockers Applicatio
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Organic Acids on Application Note:
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Carbonyls Application Note:0036 1 2
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Beclomethasone and des-chlorobeclom
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β-Estradiol, Norethindrone and Eth
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Restek Corporation -- Product Infor
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