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Specifications
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The MEINHARD®
Nebulizer
The MEINHARD®
Concentric Glass Nebulizer reflects the exacting standards in design
and manufacturing that have made it the choice of the industry worldwide.
Its advantages include simplicity of design and operation, reproducible
and self-aligning aerosol, and close fabrication control.
The MEINHARD® nebulizer is used in all major ICP
instruments on the market today.
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Specifications: |
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| Configuration: |
Concentric, monolithic |
| Material: |
Borosilicate glass |
| Tubulation O.D.: |
Shell, 6mm; fluid inputs,
4mm |
| Internal
liquid volume: |
~0.1 mL |
| Annular separation
at nozzle: |
~20µm |
| Annular area: |
~0.03mm² |
| Capillary
I.D.: |
|
| |
TR-series |
0.22 - 0.32mm |
| |
HEN |
0.10mm |
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Functional criteria: |
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Pc:
Calibration input pressure at rated Ar\ flow |
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Ra:
Water aspiration at -5cm head, at rated\ Ar flow |
 |
| |
Pc:
(psig) |
|
Ra:(mL/min) |
|
| |
Nominal |
Range |
|
|
Nominal |
Range |
| |
20 |
10-24 |
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|
0.5 |
0.3-0.6 |
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30 |
25-40 |
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|
1 |
0.7-1.4 |
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50 |
41-60 |
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2 |
1.5-2.4 |
| |
|
|
|
|
3 |
2.5-3.5 |
Ý |
| |
TYPE A
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TYPE C
|
TYPE K
|
| Popular ICP applications |
general
|
high solids
|
Ar low-flow
|
| Calibration reference, L/min Ar |
|
1.0 |
|
|
1.0 |
|
|
0.7 |
|
| End surfaces |
lapped
|
vitreous
|
lapped
|
| Sample capillary tip recess, mm |
|
0.0 |
|
|
~0.5 |
|
|
0.5 |
|
| Uptake suction |
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+ |
|
|
++ |
|
|
++ |
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| Stability of aerosol delivery |
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+ |
|
|
++ |
|
|
++ |
|
Ý |
| MODEL DESIGNATION: TR-Pc-NRa \
Substitute A, C or K for N to select nozzle type. |
| OPERATION: The MEINHARD® nebulizer
will aspirate liquid sample naturally when the rated flow of
gas is directed into the sidearm and a sample feed is connected
to the liquid input. All models may be operated with externally
pumped analyte provided the sample flow is not significantly
below the natural aspiration rate. Calibrations reflect a standard
operational reference and are not intended as limitations on
conditions of use, which can vary widely. Operation can be optimized
for specific instruments. |
MODIFICATIONS AND SPECIAL APPLICATIONS
| A SMALL BORE
(SB) modification provides an efficient way to link HPLC to
ICP. A small bore 1/8" O.D. liquid input replaces the standard
4 mm input on the nebulizer, reducing dead volume by approximately
80%. The end of the SB tubing is prepared for a tight, leak-free
seal. Internal geometric irregularities are kept to a minimum
to preserve peak boundaries. A chromatographic union Fit
Kit #1 is available to aid in connecting to 1/16" column
tubing. Order by substituting SB- for TR- in the model designation. |
 |
| FOR LC-MS: the CIR-50-HK
is designed to use 0.7 L/min of helium at 50 psig. A shortened
liquid input allows for insertion of a fused silica LC column
directly into the capillary of the nebulizer. Dead volume is
virtually eliminated and there is no need for connective fittings. |
 |
especially suited for microsample analysis
in HPLC and FIA. It exhibits detection limits comparable to those
of a standard MEINHARD® nebulizer while consuming
25 times less sample
(see table). It is designed to accommodate 1 L/min argon at 170
psig and can function reliably at liquid flow rates from
Fit Kit #2 rFit
Kit #1 isFit Kit #1-Micro uses microbore 0.008" ID Teflon tubing to dramatically reduce
dead volume in the sample uptake tubing to the HEN. To order,
request model HEN-170-AA.
 |
| Representative Detection Limits
(µg/L) |
| Rate |
|
Ref. 1 |
TR-30-A3 |
HEN |
| |
(µL/min): |
1900 |
2000 |
80 |
|
| Cu |
324.7 |
5.4 |
3 |
3 |
| Ni |
231.6 |
15 |
5 |
5 |
| Pb |
220.3 |
42 |
20 |
20 |
| As |
193.6 |
53 |
30 |
40 |
| Be |
313.0 |
0.3 |
0.2 |
0.2 |
|
| (1) R. K. Winge, V.
A. Fassel, V. J. Peterson, and M. A. Floyd, Inductively Coupled
Plasma-Atomic Emission Spectroscopy, An Atlas of Spectral Information,
Elsevier, New York (1985) |
TR-30-A3 (above) and HEN-170-AA (below) nebulizing ~3000 µL/min
and ~50 µL/min, respectively.
| THE
DIRECT INJECTION HIGH EFFICIENCY NEBULIZER
(DIHEN) is the latest offering
from Meinhard Glass Products that incorporates the low liquid
flow rate of the HEN and the ability to inject the sample directly
into the analytical plasma. At liquid flow rates from
1-100 µL/min a small aerosol droplet size is produced
and nearly 100% of the sample is introduced into the plasma.
The features of the DIHEN are ideally suited for samples limited
in volume, as with forensic, biological or when dilutions must
be limited to maintain detection limits. These and other characteristics
of the DIHEN can be found in an Analytical Chemistry article
titled: 'A Direct Injection High-Efficiency
Nebulizer for Inductively Coupled Plasma Mass Spectrometry',Anal\
Chem. 1998, 70, 1012-1020 |
(US Patent #6166379)
FIT KITS -
See our Accessories Page for our
Fitting Kits.
|
SPECIAL REQUESTS - If you
have unique requirements or an unusual application, feel free
to call. We can manufacture nebulizers with a wide variety
of dynamic characteristics and we welcome your inquiries.
MAINTENANCE
TIPS - Properly maintained, a MEINHARD®
nebulizer should yield long-lasting and trouble-free performance.
We offer a set of helpful tips to aid in the routine care
of a nebulizer and to provide restorative procedures for inoperative
(but undamaged) nebulizers. The tips are available as a courtesy
to our customers on this web site or simply call to request
a free printed copy.
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