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| 供貨周期 | 現(xiàn)貨 |
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詳細(xì)介紹
NUCLEODUR_液相色譜柱NUCLEODUR 高純硅膠鍵合相液相色譜柱
NUCLEODUR（閃電）系列產(chǎn)品—帶您探索神秘的液相色譜世界 NUCLEODUR（閃電）按照您在液相檢測(cè)中面對(duì)的不同樣品分離的實(shí)際要求，為您提供完整系列的產(chǎn)品 ※ Gravity: PH穩(wěn)定應(yīng)用范圍寬達(dá)1.0—11.0 ※ C18RP: 低壓柱/優(yōu)惠的價(jià)格 ※ Pyrimid: 能在*水系流動(dòng)相中穩(wěn)定使用的色譜柱 ※ ISIS: 高碳載量/高耐受柱溫 ※ Sphinx: 擴(kuò)展對(duì)“極性和帶苯環(huán)”樣品的選擇性 ※ C18ec: 適合日常檢測(cè)，性能批次穩(wěn)定性好
現(xiàn)代色譜分離對(duì)色譜柱提出更高的要求，如：廣泛的通用性，對(duì)酸性，堿性和中性的樣品都能對(duì)稱出峰，填料能夠承受更寬的PH使用范圍，可以方便的選擇色譜分離的*條件。填料具備更高的機(jī)械強(qiáng)度，保證色譜柱更長(zhǎng)的壽命。而決定液相色譜柱性能的關(guān)鍵在于使用硅膠的品質(zhì)。傳統(tǒng)的液相色譜柱所填裝的硅膠，由于硅球表面的缺陷，或是其內(nèi)部的金屬雜質(zhì)含量較高，使下一步的化學(xué)鍵合不能*進(jìn)行。因此會(huì)在硅球的表面殘余一定的硅醇基和其他活性基團(tuán)，直接造成色譜柱在分析樣品，特別是堿性樣品時(shí)，出現(xiàn)脫尾現(xiàn)象或樣品被吸附。 |
NUCLEODUR® high purity silica phases for HPLC |
Features |
| NUCLEODUR® is a fully synthetical type B silica (silica of 3rd generation) offering highly advanced physical properties:
NUCLEODUR® as a state-of-the-art silica is the ideal base material for modern HPLC phases. It is the result of MACHEREY-NAGEL's pioneering research in chromatography for almost 50 years. |
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| NUCLEODUR® with 1.8 µm particle size for increased separation efficiency |
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產(chǎn)品應(yīng)用:
NUCLEODUR--新一代*對(duì)稱的硅球 | |
研究表明液相色譜硅球中除了硅醇基活性基團(tuán)外，金屬雜質(zhì)，如鐵，鈉等的存在，同樣會(huì)與被測(cè)樣品中的胺和酚類化合物產(chǎn)生吸附，影響分析結(jié)果。
NUCLEODUR 不但嚴(yán)格控制硅球表面的硅醇基團(tuán)，還特別成功地消除了硅球內(nèi)的金屬雜質(zhì)。 |
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右表是使用AAS（原子吸收）方法檢測(cè)NUCLEODUR 100A-5um 規(guī)格的硅球，顯示其金屬雜質(zhì)含量極低。 |
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訂貨信息:
Summary of available NUCLEODUR® phases | ||||||
Phase | Modification | % C | pH range | Particle sizes [µm] | USP | Structure |
C18 Gravity | octadecyl, high density coating, multi-endcapping | 18 | 1–11 | 1.8 · 3 · 5 | L1 |
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C8 Gravity | octyl, high density coating, multi-endcapping | 11 | 1–11 | 1.8 · 5 | L7 |
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C18 Isis | octadecyl, specially cross-linked modification, endcapped | 20 | 1–10 | 1.8 · 3 · 5 | L1 |
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C18 Pyramid | octadecyl with polar endcapping | 14 | 1–9 | 1.8 · 3 · 5 | L1 |
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PolarTec | octadecyl with embedded polar group | 17 | 1–9 | 1.8 · 3 · 5 | L1 L60 |
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Phenyl-Hexyl | special phenylhexyl phase | 10 | 1–10 | 1.8 · 3 · 5 | L11 |
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PFP | pentafluorophenyl-propyl with multi-endcapping | 8 | 1–9 | 1.8 · 3 · 5 | L43 |
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Sphinx RP | bifunctional, balanced ratio of propylphenyl and octadecyl, endcapping | 15 | 1–10 | 1.8 · 3 · 5 | L1 L11 |
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C18 HTec | octadecyl, high density coating, high capacity, multi-endcapping | 18 | 1–11 | 1.8 · 3 · 5 | L1 |
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C18 ec | octadecyl, medium density, endcapping | 17.5 | 1–9 | 3 · 5 | L1 |
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C8 ec | octyl, medium density, endcapping | 10.5 | 1–9 | 3 · 5 | L7 |
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HILIC | ammonium – sulfonic acid | 7 | 2–8.5 | 1.8 · 3 · 5 |
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CN/CN-RP | cyano (nitrile) for NP and RP separations | 7 | 1–8 | 3 · 5 | L10 |
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NH2/NH2-RP | aminopropyl for NP and RP separations | 2.5 | 2–8 | 3 · 5 | L8 |
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SiOH | unmodified NUCLEODUR® | – | 2–8 | 3 · 5 | L3 |
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