CONCENTRATORS
116
Kudema-Danish / Snyder / Distillation
Snyder Distillation Column Snyder distillation column with floating ball valves for improved vapor-liquid contact.
Kuderna-Danish Apparatus with a Graduated Concentrator Tube The Kuderna-Danish apparatus was developed in the laboratories of Julius Hyman and Company for the concentration of trace amounts of sample dissolved in organic solvents. The column is designed to speed evaporation with reduced hold-up. It is very useful in sample preparation before analysis with solvents such as petroleum ether or hexane.
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Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
Column Length without Joint (mm), Number of Chambers
Standard Taper Joints
Case Qty
Part Number
• • • •
Graduated concentrator tube
570025 series has hooks and springs 570035 series has a polyacetal clamp
503000-0121 503000-0122
24/40 24/40
225, 3 375, 6
1 1
For solvent recovery, a 547300 or 547400 Solvent Recovery Apparatus may be added to this unit Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
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Preparation involves filling the flask to between 40 to 60 percent of capacity. To prevent sample loss initially, column
should be pre-wet with about 1 mL of the solvent used in the concentration. If solvent is allowed to escape, entire assembly should be set up in a hood. Charged assembly should be placed over a vigorously boiling water bath. Water level should be maintained just below the lower joint and apparatus mounted so that the lower rounded surface of the flask is bathed in steam. Final sample remains in the lower tube for further analysis.
Micro Snyder Distillation Column Snyder distilling column with floating ball valves for improved vapor-liquid contact. 569001 series has hooks; 569011 series does not • Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements •
Flask x Tube Capacity (mL)
Part Number
Feature
Case Qty
570025-0250 570025-0500 570035-0250 570035-0500
250 x 10 500 x 10 250 x 10 500 x 10
Hooks and springs Hooks and springs
1 1 1 1
Column Length without Joint (mm);
Clamp Clamp
Part Number
Feature
Case Qty
Number of Chambers
569011-0219 569011-0319 569001-0219 569001-0319
115; 2 145; 3 115; 2 145; 3
No hooks No hooks
1 1 1 1
Hooks Hooks
Replacement Parts
Part Number
Description
Case Qty
3-Chamber Snyder Distillation Column, 24/40, Column x chamber length 225 x 50 mm, Overall height 305 mm 250 mL Evaporator Flask for Kuderna-Danish Concentrator w/Hooks, 24/40 Top, 19/22 Bottom 500 mL Evaporator Flask for Kuderna-Danish Concentrator w/Hooks, 24/40 Top, 19/22 Bottom 10 mL Concentrator Tube w/ Hooks for Kuderna-Danish Concentrator, 19/22, Height 105 mm, Subdiv. 0-1 in 0.1, 2-10 in 1 mL Size 19 Polyacetyl, Standard Taper Clamp, Blue, Fits joint sizes 19/22, 19/38 250 mL Flask for Kuderna-Danish Concentrator w/Clamp, 24/40 Top, 19/22 Bottom 500 mL Flask for Kuderna Danish Concentrator w/Clamp, 24/40 Top, 19/22 Bottom 10 mL Concentrator Tube for Kuderna-Danish Concentrator w/Clamp, 19/22, Height 105 mm, Subdiv. 0-1 in 0.1, 2-10 in 1 mL
503000-0121
1
570001-0250
1
Improved Snyder Distillation Column The improved design of these Snyder columns speeds evaporation and reduces hold-up within the column.
570001-0500
1
570050-1025
1
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Ideal for use with pesticides such as Lindane and Parathion in petroleum ether or ethyl ether Solvents with higher boiling points also may be used to good advantage Each section is approximately 50 mm long Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
675300-0019
12
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570011-0250
1
• •
570037-0500
1
Column Length without Joint (mm), Number of Chambers
570051-1025
1
Standard Taper Joints
Case Qty
Part Number
503100-0002 503100-0003
24/40 24/40
120, 2 170, 3
1 1
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