1. Define the analytical task
List the sample matrix, target analytes, expected concentration range, applicable method or standard, and the decision the result must support.
Selection Notes
From test method to instrument configuration
Instrument selection depends on sample type, target analytes, throughput, accessories, software, voltage, and documents required for procurement.
Selection framework
Chromatography
Select HPLC, UPLC, GC, GPC, detector, and post-column modules according to method, analytes, sensitivity, and throughput.
Water Quality Testing
Confirm test parameters, detection range, digestion needs, reagent workflow, field or benchtop use, and documentation requirements.
Sample Preparation
Match microwave digestion, water digestion, or purge-and-trap instruments to sample matrix and downstream analytical method.
Spectroscopy
Select UV-visible or atomic absorption systems based on measurement type, element list, accessories, and routine QC workload.
Procurement Framework
Four steps from laboratory need to quotation
A useful recommendation begins with the method and sample, not with a model number.
2. Match the measurement technique
Choose chromatography, spectroscopy, water-quality analysis, or sample preparation according to selectivity, sensitivity, throughput, and downstream workflow.
3. Confirm the configuration
Specify detector, pump, injector, column, digestion vessel, accessories, software, gas supply, voltage, plug, and workstation requirements.
4. Verify procurement scope
Confirm installation, training, consumables, spare parts, warranty, English documents, packing, delivery terms, and destination requirements before quotation.
Frequently Asked Questions
Common analytical instrument selection questions
These answers provide an initial screening framework. Final configuration should be confirmed against the applicable method and project requirements.
When should a laboratory choose HPLC instead of UPLC?
Choose HPLC for established routine methods, broad column availability, straightforward maintenance, and moderate pressure requirements. Consider UPLC when the validated method, smaller-particle columns, shorter run time, higher throughput, and available service capability justify the higher-pressure platform.
When is an isocratic HPLC system suitable?
An isocratic system is suitable when the mobile-phase composition remains constant throughout the run and the analytes can be separated within an acceptable time. Gradient capability is preferable for complex samples, compounds with a wide polarity range, or methods that require programmed solvent changes.
How should a water-quality analyzer be selected?
Start with the required parameters and ranges, then confirm digestion and reagent workflow, sample throughput, calibration approach, field or benchtop use, data output, consumables, and the applicable local test method. Do not select only by the number of listed parameters.
What information is required for an accurate instrument quotation?
Provide the application, sample type, target analytes or method, expected range, throughput, preferred model, required accessories, destination voltage and plug, quantity, documentation needs, delivery country, and desired timeline.