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The Assist is an automated sample introduction system for ICP-OES or ICP-MS. It consists of purpose-built programmable syringe drives with an integrated valve system. The Assist delivers the highest level of accuracy, stability and sample throughput by controlling the delivery of both sample and internal standard or diluent, eliminating the inaccuracies and pulsations caused by peristaltic pumps. The Assist provides you with:
Twice the sample throughput. The rinse time, stabilization time and the time for the sample to move from the autosampler to the nebulizer are all reduced. This reduces the time for a typical analysis by at least half.
Better precision. The sample is delivered by a precisely controlled syringe, eliminating the signal pulsation problem which occurs with the usual peristaltic pump delivery system.
Better accuracy. The internal standard is delivered by a second precision syringe drive, ensuring that the ratio of internal standard to sample is accurately maintained. The fluctuations in this ratio that occur when the internal standard is delivered by peristaltic pump are eliminated, greatly improving the analytical accuracy.
Automatic dilution. The second syringe drive can also be used to deliver a diluent, enabling accurate dilution by a factor of up to 20:1 to be carried out automatically.
Reduced carryover. The sample does not contact any peristaltic pump tubing and the sample path is totally inert. This allows for a faster rinse and reduces carryover.
Low sample and internal standard usage. The volumes required are substantially reduced, resulting in lower cost of reagents and less wastage.
Flexibility in the selection of the ratio of sample to internal standard. The syringe system allows you to use sample to internal standard ratios of up to 20:1 and still get accurate correction.
Longer life of consumables. The lower sample volume and reduced analysis time mean that you save on consumables such as torches and ICP-MS cones as well as argon.
Compatibility. The Assist software is configured to operate with almost all models of ICP-MS, ICP-OES and autosampler.
The Assist is a modular system of syringe drives and switching valves and it can be configured to suit specific applications.
Premium Package. This is the most common system and is the system described above. It incorporates two syringe drives and a Niagara switching valve. It provides for the inline delivery and mixing of the sample and internal standard or diluent.
Basic Package. This system is used when inline delivery of internal standard or diluent is not required. It incorporates a single syringe drive and a Niagara switching valve. It provides all of the benefits listed above with the exception of those relating to delivery of internal standard or diluent.
Oils Package. This system is configured specifically for the analysis of wear metals in raw (undiluted) lubricating oils. It incorporates three syringe drives and a Niagara switching valve. It takes a sample of the oil, mixes it with a diluent such as kerosene and precisely delivers the diluted oil to the ICP spectrometer. It eliminates the need for manual dilutions and increases the speed of analysis.
The new Assist CM is controlled by a dedicated control module rather than the instrument PC. The benefits are:
Part Number Description KT-1123 Assist CM Premium Package (2 syringe units) KT-1129 Assist CM Basic Package (1 syringe unit) KT-1132 Assist CM Oils Package (3 syringe units) KT-1122 Assist CM Basic Package for HF with uptake syringe KT-1131 Assist CM Premium Package for HF with uptake syringe
A mounting bracket is required for most ICP models. Choose from the following:
Part Number ICP Model 70-803-0979 Agilent 7700/7900/8800/8900 70-803-0906 Bruker Aurora 800 70-803-1141 21-809-2768 PerkinElmer Optima 2/4/5/7/8000 DV 21-809-3690 Spectro Arcos/SpectroBlue with cyclonic spray chamber No bracket required Agilent Vista/700-ES Radial No bracket required Agilent 4100 MP-AES No bracket required Spectro MS 70-803-1141 All other models
Spares for Assist 70-803-0967 Syringe 100uL for Assist 70-803-0951 Syringe 250uL for Assist 70-803-0952 Syringe 500uL for Assist 70-803-0953 Syringe 1.0mL for Assist 70-803-0954 Syringe 2.5mL for Assist 70-803-0955 Syringe 5.0mL for Assist 70-803-0931 Syringe 10mL for Assist 70-803-1046 4 Port Valve for Assist Syringe Drive 70-803-0965 60 Way Stainless Steel Membrane Holder Kit (17mm) 70-803-0930 Membrane for Autosampler Rack (500 sheets) 70-803-1065 Stainless Steel Diluter Probe for Cetac 500 Series 70-803-0858 Stainless Steel Diluter Probe for Cetac 1400 70-803-0964 Stainless Steel Diluter Probe for AIM1250 70-803-0848 Stainless Steel Diluter Probe for SPS-3/SPS-4 or AIM3600 70-803-1074 Tubing Kit for Assist Main Unit with Pump 70-803-1075 Tubing Kit for Assist Main Unit without Pump 70-803-1076 Tubing Kit for Assist IS/Diluent Syringe 70-803-1077 Tubing Kit for Assist Uptake Syringe 70-803-0938 Tubing, Valve to Pump, for Assist (1.0mm ID x 1.6mm OD x 1000mm long) 70-803-0939 Tubing, Valve to Probe, for Assist (700mm long with fittings)
The Oil Assist system is working great!
Major automobile manufacturer - USA
We have recently started utilizing the Assist Syringes for some specialized methods and have seen significant stability improvements over peristaltic internal standard and carrier movement.
Contract laboratory - Canada
Since installing the Assist our sample time has gone from 110sec to 41sec and precision is improved by a factor of 2. Carryover is much reduced and I can go from a 200ppm Au sample and get a 5ppb in the next blank. Traditionally I would have had a very long rinse time to recover from a 200ppm sample and the tubing gets contaminated.
Minerals laboratory - USA