ABOUT NEBULIZERS
Choosing a Nebulizer	Specifications	Maintenance Tips	User Manuals	References

Specifications

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.

 

	Specifications:
	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
	Functional criteria:
	Pc: Calibration input pressure at rated Ar\ flow
	Ra: Water aspiration at -5cm head, at rated\ Ar flow

 

	Pc: (psig)   Ra:(mL/min)     Nominal Range     Nominal Range    20  10-24     0.5 0.3-0.6    30  25-40     1 0.7-1.4    50  41-60     2 1.5-2.4           3 2.5-3.5 Ý
	Nozzle Selection Guide:   TYPE A 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   +     ++     ++    Stability of aerosol delivery    +     ++      ++    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.

THE HIGH EFFICIENCY NEBULIZER (HEN)s 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.

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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)

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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.