參考價(jià)	面議

產(chǎn)品簡(jiǎn)介

苯基固定相通過π-π作用力提高了與平面芳香族化合物的相互作用

詳細(xì)介紹

XSelect CSH苯已基柱比起傳統(tǒng)的反相柱提供另一種選擇性，是方法開發(fā)中一種很有價(jià)值的工具，如低pH條件下。

XSelect CSH苯基固定相通過π-π作用力提高了與平面芳香族化合物的相互作用。與氟苯基色譜柱相比，相比與那些次級(jí)的Lewis堿相互作用力而言XSelect CSH苯基色譜柱更多強(qiáng)調(diào)反相作用。

XSelect CSH色譜柱的可擴(kuò)展性和通用性使其可用作分離和純化科學(xué)家的有力的方法開發(fā)工具。用于合成CSH固定相的雜化顆粒材質(zhì)作為現(xiàn)有最耐壓力的色譜柱而為業(yè)界所熟知。耐用性與OBD填裝技術(shù)的結(jié)合產(chǎn)生了在寬運(yùn)行條件下具有優(yōu)異壽命的色譜柱。色譜柱設(shè)計(jì)固有的可擴(kuò)展性使得純化科學(xué)家能夠選擇從更大到更小和更窄的制備型色譜柱，降低溶劑消耗和餾分體積。

Simultaneous determination of twelve sweeteners and nine preservatives in foods by solid-phase extraction and LC-MS/MS

A rapid and simple method for the simultaneous determination of twelve sweeteners and nine preservatives in various foods by liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed. The sweeteners and preservatives were extracted from solid samples with 80% and 50% methanol and from liquid samples with 80% methanol, followed by Oasis WAX cartridge cleanup. The LC separation was performed on a XSelect CSH Phenyl-Hexyl column (5 μm, 2.1 mm ×150 mm) with a phase of 10 mmol/L acetate buffer (pH 4.0)-acetonitrile and MS detection with negative ion electrospray ionization. The quantification limits of acesulfame K (AK), alitame (AL), aspartame (ASP), cyclamic acid (CYC), neotame (NEO), saccharin Na (SAC), p-hydroxybenzoic acid methyl (PHBA-Me), p-hydroxybenzoic acid ethyl (PHBA-Et), p-hydroxybenzoic acid isopropyl (PHBA-iPr), p-hydroxybenzoic acid propyl (PHBA-Pr), p-hydroxybenzoic acid isobutyl (PHBA-iBu) and p-hydroxybenzoic acid butyl (PHBA-Bu) were 0.001 g/kg, those of dulcin (DU), glycyrrhizic acid (GLY), neohesperidin dihydrochalcone (NHDC), rebaudioside A (REB), stevioside (STV), sucralose (SUC) and benzoic acid (BA) were 0.005 g/kg, and those of sorbic acid (SOA) and dehydroacetic acid (DHA) were 0.02 g/kg. The mean recoveries from ten kinds of foods fortified at the levels of 0.02 and 0.2 g/kg were 70.9-119.0%, and their relative standard deviations were 0.1-11.7%.

品名	編號(hào)
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 10 mm X 250 mm, 1/pkg	186008247
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 3 mm X 75 mm, 1/pkg	186005648
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 3 mm X 50 mm, 1/pkg	186005371
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 3 mm X 150 mm, 1/pkg	186005392
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 4.6 mm X 150 mm, 1/pkg	186005380
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 3 mm X 30 mm, 1/pkg	186005389
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 4.6 mm X 20 mm, 1/pkg	186005394
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 3 mm X 150 mm, 1/pkg	186005373
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 3 mm X 50 mm, 1/pkg	186005390
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 3 mm X 100 mm, 1/pkg	186005372
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 4.6 mm X 50 mm, 1/pkg	186005377
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 4.6 mm X 75 mm, 1/pkg	186005378
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 4.6 mm X 50 mm, 1/pkg	186005397
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 3 mm X 100 mm, 1/pkg	186005391
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 4.6 mm X 30 mm, 1/pkg	186005396
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 4.6 mm X 30 mm, 1/pkg	186005376
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 4.6 mm X 100 mm, 1/pkg	186005379
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 4.6 mm X 75 mm, 1/pkg	186005398
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 4.6 mm X 100 mm, 1/pkg	186005399
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 4.6 mm X 150 mm, 1/pkg	186005400
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 4.6 mm X 250 mm, 1/pkg	186005401
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 100 mm, 3/pkg	176002617
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 50 mm, 1/pkg	186006129
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 4.6 mm X 100 mm, 1/pkg	186006135
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 150 mm, 3/pkg	176002896
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 50 mm, 3/pkg	176002615
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 30 mm, 1/pkg	186006128
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 100 mm, 1/pkg	186006131
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 150 mm, 1/pkg	186006734
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 4.6 mm X 75 mm, 1/pkg	186006134
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 75 mm, 1/pkg	186006130
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 4.6 mm X 30 mm, 1/pkg	186006132
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 4.6 mm X 50 mm, 1/pkg	186006133
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 75 mm, 3/pkg	176002616
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 30 mm, 1/pkg	186006124
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 75 mm, 1/pkg	186006126
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 50 mm, 1/pkg	186006125
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 30 mm, 3/pkg	176002610
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 50 mm, 3/pkg	176002611
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 100 mm, 3/pkg	176002613
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 3 mm X 30 mm, 3/pkg	176002614
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 150 mm, 3/pkg	176002895
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 100 mm, 1/pkg	186006127
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 150 mm, 1/pkg	186006733
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 2.1 mm X 75 mm, 3/pkg	176002612
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 2.1 mm X 50 mm, 1/pkg	186005365
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 2.1 mm X 100 mm, 1/pkg	186005366
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 2.1 mm X 30 mm, 1/pkg	186005383
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 2.1 mm X 150 mm, 1/pkg	186005386
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 2.1 mm X 20 mm, 1/pkg	186005363
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 2.1 mm X 150 mm, 1/pkg	186005367
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 2.1 mm X 30 mm, 1/pkg	186005364
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 2.1 mm X 50 mm, 1/pkg	186005384
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 2.1 mm X 100 mm, 1/pkg	186005385
XSelect CSH Phenyl-Hexyl Column, 130?, 3.5 µm, 2.1 mm X 75 mm, 1/pkg	186005645
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 2.1 mm X 20 mm, 1/pkg	186005382
XSelect CSH Phenyl-Hexyl Column, 130?, 5 µm, 3 mm X 250 mm, 1/pkg	186005393
XSelect CSH Phenyl-Hexyl Method Validation Kit, 130?, 2.5 µm, 3 mm X 100 mm, 3/pkg	186006248
XSelect CSH Phenyl-Hexyl Method Validation Kit, 130?, 2.5 µm, 4.6 mm X 50 mm, 3/pkg	186006250
XSelect CSH Phenyl-Hexyl XP Column, 130?, 2.5 µm, 4.6 mm X 150 mm, 1/pkg	186006735
XSelect CSH Phenyl-Hexyl Method Validation Kit, 130?, 2.5 µm, 4.6 mm X 150 mm, 3/pkg	186006793
XSelect CSH Phenyl-Hexyl Method Validation Kit, 130?, 2.5 µm, 3 mm X 150 mm, 3/pkg	186006792
XSelect CSH Phenyl-Hexyl Method Validation Kit, XP Column, 130?, 2.5 µm, 3 mm X 50 mm, 3/pkg	186006247
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 19 mm X 50 mm, 1/pkg	186005446
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 50 mm X 50 mm, 1/pkg	186005508
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 50 mm X 250 mm, 1/pkg	186005511
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 19 mm X 250 mm, 1/pkg	186005506
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 19 mm X 150 mm, 1/pkg	186005448
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 50 mm X 150 mm, 1/pkg	186005510
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 30 mm X 150 mm, 1/pkg	186005452
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 30 mm X 250 mm, 1/pkg	186005507
XSelect CSH Phenyl-Hexyl OBD Prep Column, 130?, 5 µm, 50 mm X 100 mm, 1/pkg	186005509