NUCLEODUR® C18 Gravity

High purity silica phase for HPLC

Nonpolar high density monomeric octadecyl modification,
endcapped · 18 % C · USP L1

Properties

Key features:
Suitable for LC/MS and HPLC at pH extremes (pH 1–11)

Superior base deactivation

Ideal for method development

Technical characteristics:
High density octadecyl modification, multi-endcapped
Pore size 110 Å; particle sizes 1.8 μm, 3 μm and 5 μm
7, 10, 12 and 16 μm particles for preparative purposes on request
Carbon content 18 %

Recommended application:
Overall sophisticated analytical separations
Compound classes separated include pharmaceuticals, e.g., analgesics, antiinflammatory drugs, antidepressants; herbicides; phytopharmaceuticals; immunosuppressants

For applications click here.

不同PH下的穩(wěn)定使用

圖一：色譜柱在強(qiáng)jian性PH=11下的穩(wěn)定性

色譜柱：50×4.6mm

流動相：甲醇：水：氮=20:80:0.5（PH=11）

流 速：1.3毫升/分鐘

進(jìn)樣量：2ul

溫 度：30℃

檢測器：UV 254nm

樣 品：1.茶jian Theophyline   2.kafeiyin Caffeine

圖二：色譜柱在強(qiáng)酸性PH=1.5下的穩(wěn)定性

色譜柱：NUCLEODUR(閃電) C18 Gravity, 125×4.0mm 5um

流動相：乙腈：1% TFA水溶液=50:50（PH=1.5）

流 速：1.0毫升/分鐘

進(jìn)樣量：5ul

溫 度：30℃

檢測器：UV 230nm

樣 品：1. 吡啶 2.甲苯 3.乙苯

   圖一是NUCLEODUR(閃電) C18 Gravity與其他4個(gè)品牌新型反相C18色譜柱穩(wěn)定性的比較。在PH=11的流動條件下，連續(xù)300次進(jìn)樣后，NUCLEODUR(閃電) C18 Gravity沒有出現(xiàn)因柱效下降，造成的出峰展寬或保留時(shí)間縮短的現(xiàn)象。

   圖二是 NUCLEODUR(閃電) C18 Gravity系列反相色譜柱在低PH條件下優(yōu)異的穩(wěn)定性。由于硅膠表面特別穩(wěn)定的鍵合，有效防止了鍵合相在低PH時(shí)的脫落，即使經(jīng)過在5000ml的PH=1.5流動相沖洗后，3種被測樣品的保留時(shí)間沒有變化。

所以在NUCLEODUR(閃電) C18 Gravity系列可以在PH=1.0—11.0之間穩(wěn)定使用，是您研究開發(fā)特別條件應(yīng)用的好幫手。

通痹靈中maqianzijian，士的ning的測定

色譜柱：NUCLEODUR(閃電) C18 Gravity 125×4.6mm 5um

流動相：甲醇：水：三乙胺=60:40:0.5 使用冰醋酸調(diào)整PH=5

流 速：1.0 mL/min

檢測器：UV 254nm

回收率：maqianzijian，shidening分離度大于3   maqianzijian的線性r=0.9996，回收率=97.93%

       shidening的線性r=0.9996，回收率=97.69%

人血漿中*的測定

色譜柱：NUCLEODUR(閃電) C18 Gravity 250×4.6mm 5um

流動相：甲醇：0.02mol/L 醋酸銨（PH=9.9）=92:8

流 速：1.0 mL/min

檢測器：UV 254nm

回收率：*，內(nèi)標(biāo)分離度大于3   *的線性r=0.9999

FMOC—衍生檢測草甘膦，AMPA和草銨膦

色譜柱：㏄250×3mm NUCLEODUR C18 Gravity，5um

衍 生：加入洗脫液0.1ml緩沖液，PH9.5

緩沖液的配置:
             a)19.108 g Na2B4O7 * 10H2O/1000 ml water

             b)12.404 g H2BO2 and 2.92g NaCI/1000 ml water

             a)和b)體積比1:1混合，使用20%NaOH調(diào)節(jié)PH9.5加入 1.0mlFMOC—CI(2.5 m mol乙腈)，反應(yīng)時(shí)間：30—60分鐘，加入3毫升yimi震蕩1分鐘，取1毫升水相，加入30ul 130% HCI 震蕩1—2小時(shí)。

色譜條件：流動相：A)乙腈； B)H3PO4,PH1.2

                  30—35% A in 27 min,35—90% A in 3 min,90% A for 6 min,90—30% A in 2 min,30% A for 7 min

流 速：0.5 ml/min

進(jìn)樣量：100 or 10 ul

溫 度：30℃

檢測器：Fluorescence,Ex.263 nm,Em.317 nm

檢出限：0.05 ug/l

樣 品：glyphosate 草甘膦    9.825 min

            AMPA                       13.633min

            Glufosinate草銨膦   15.675min

作 者：Schussier;Mikler

來 源：Bayrisches Landesamtfur Wasserwirtschaft,Munchen.Germany

國家對照品舒巴坦鈉的標(biāo)定

使用NUCLEODUR C18 Gravity和對照柱X按照《中國藥典》方法檢測進(jìn)行標(biāo)定

色譜柱：NUCLEODUR C18 Gravity 250×4.6mm 5um  對照柱X 250×4.6mm 5um

流動相：0.005 mol/L 四丁基氫氧化銨（PH=5.0）:乙腈=75:25

溫  度：35℃

檢測器：UV 230nm

結(jié)果:

EC standard columns for analytical HPLC

Ordering information

Eluent in column acetonitrile – water

Length ->

30 mm

50 mm

75 mm

100 mm

125 mm

150 mm

250 mm

NUCLEODUR® C18 Gravity, 1.8 µm

2 mm ID

760078.20

760079.20

760071.20

760076.20

760075.20

3 mm ID

760078.30

760079.30

760076.30

4 mm ID

760078.40

760079.40

760076.40

4.6 mm ID

760078.46

760079.46

760076.46

EC guard columns*

4 x 2 mm

761901.20

4 x 3 mm

761901.30

NUCLEODUR® C18 Gravity, 3 µm

2 mm ID

760080.20

760084.20

760081.20

760083.20

760082.20

3 mm ID

760080.30

760084.30

760081.30

760083.30

760082.30

4 mm ID

760080.40

760084.40

760081.40

760083.40

760082.40

4.6 mm ID

760080.46

760086.46

760084.46

760081.46

760083.46

760082.46

EC guard columns*

4 x 2 mm

761902.20

4 x 3 mm

761902.30

CC guard columns**

8 x 3 mm

761124.30

8 x 4 mm

761124.40

NUCLEODUR® C18 Gravity, 5 µm

2 mm ID

760102.20

760104.20

760100.20

760103.20

760101.20

3 mm ID

760102.30

760104.30

760100.30

760103.30

760101.30

4 mm ID

760102.40

760104.40

760100.40

760103.40

760101.40

4.6 mm ID

760102.46

760106.46

760104.46

760100.46

760103.46

760101.46

EC guard columns*

4 x 2 mm

761903.20

4 x 3 mm

761903.30

CC guard columns**

8 x 3 mm

761125.30

8 x 4 mm

761125.40

Guard columns in packs of 3, EC columns in packs of 1

Guard columns for EC columns

EC columns with ID

Use guard
column holder

2 mm

3 mm

4 mm

4.6 mm

*

Column Protection System

EC guard column

4/2

4/3

4/3

4/3

REF 718966

**

ChromCart® guard column system

CC guard column

8/3

8/3

8/4

8/4

REF 721359

Custom-packed EC columns with other dimensions are available on request.

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VarioPrep columns for preparative HPLC

Ordering information

Eluent in column acetonitrile – water

Length

10 mm ID

21 mm ID

32 mm ID

40 mm ID

NUCLEODUR® C18 Gravity, 5 µm

50 mm

762103.100

762103.210

125 mm

762109.100

762109.210

150 mm

762100.400

250 mm

762113.100

762113.210

762113.320

762113.400

NUCLEODUR® C18 Gravity, 10 µm

250 mm

762250.210

762250.400

VP guard columns with NUCLEODUR® C18 Gravity

8 mm ID

16 mm ID

32 mm ID

10 mm*

762160.80

762160.160

15 mm*

762163.320

* VP guard column

Size

Pack of

for VP column

required holder

REF

VP 10/8

10 x 8 mm ID

2

10 mm ID

8 mm

718251

VP 10/16

10 x 16 mm ID

2

21 mm ID

16 mm

718256

VP 15/32

15 x 32 mm ID

1

32–40 mm ID

32 mm

718253

Custom-packed VP columns with other dimensions are available on request.

For details of the VarioPrep column system click here.

Standard program* of columns packed with NUCLEODUR® C18 Gravity

Column system

Particle size:

1.8 µm

3 µm

5 µm

10 µm

Analytical

EC columns (standard system, 2–4.6 mm)

Preparative

VarioPrep columns (VP, ≥ 8 mm)

  if you do not know our HPLC column systems, click the "i" for further information

* Please note! Most combinations of MN column types, available column dimensions and particle sizes can be custom-packed on request.