Sherwood Model 420Cs Flame Photometer
The Model 420Cs is the latest addition to our dual channel Flame Photometer range.
Based on the Model 420 Flame Photometer,
the M420Cs adds greater flexibility and also benefits from recent improvements to stability (precision)
available on all of the Sherwood 420 Series and 410 Series of Flame Photometers since January 2017.
Unique to the Sherwood range, the M420Cs Flame Photometer comes with a Caesium reference channel as an alternative to the existing Lithium reference channel traditionally used in Corning and then Sherwood instruments.
The Caesium Reference facility provides greater flexibility; allowing the operator to choose the internal reference element based on sample matrix considerations or to match established procedures developed with other instruments, e.g. the IL 943 Flame Photometer.
A primary practical example where Caesium is beneficial as an internal reference is the ability to measure
Lithium in clinical samples with the increased precision afforded by use of an internal reference method.
The M420Cs Flame Photometer features:
|Na Serum||110.0 to 170.0 mmol/l||Na Serum||Na Serum within ± 2 mmol/l|
|Na Urine||0.0 to 199.9 mmol/l||Na Urine||Na Urine within ± 4 mmol/l|
|K Serum||0.00 to 10.00 mmol/l||K Serum||K Serum within ± 0.2 mmol/l|
|K Urine||0.0 to 200.0 mmol/l||K Urine||K Urine within ± 2 mmol/l|
|Li Serum||0.00 to 3.00 mmol/l||Li Serum||Li Serum within ± 0.2 mmol/l|
|Na (140.0 mmol/l)
with de-ionised water
|< 0.5% CV (w/ Ref Facility)||Na Serum/Urine||1 in 200|
|K (5.00 mmol/l)
|< 0.5% CV (w/ Ref Facility)||K Serum||1 in 200 with de-|
|K (80.0 mmol/l)
|< 0.5% CV (w/ Ref Facility)||K Urine||1 in 200 with de-|
|Li (1.50 mmol/l)
|< 0.5% CV (w/ Ref Facility)||Li Serum||1 in 50 with de-|
The above is correct for use with Propane. Results obtained from 20 replicates of the same sample,
aspirating sample for 20 seconds, then water for 10 seconds. To achieve the stated specification the
flame must be alight for a minimum of 30 minutes, with diluent (containing Diluent Concentrate) being aspirated.
Regulated BlueNotes 420 SoftwareProduct Reference: 42066100
Regulated BlueNotes 420 Software is designed to provide features that
enable users to operate in a manner compliant with data handling standards
such as 21 CFR Part 11. The software expands functionality of the
Model 420Cs Flame Photometer; allowing data collection from all three
element detector channels simultaneously in one sample sequence.
There is also the option to configure the software to use Potassium as an internal reference channel in addition to the Caesium (default) or Lithium channels.
Regulated features include: