Jepson Bolton's International Catalogue
The Sherwood Model 410 Flame photometer directly measures Alkali and Alkaline Earth metals Sodium (Na), Potassium (K), Lithium (Li), Calcium (Ca), Barium (Ba), Caesium (Cs), Rubidium (Rb) and Strontium ( Sr) by means of a low temperature flame using propane, butane or Natural gas. The measurement on the Model 410 Clinical Flame Photometer can be semi automated by means of the Model 805 Clinical Diluter and for clinical samples the ease of use is enhanced by the Lineariser Option which enables results in the clinically significant concentrations to be displayed directly on the Model 410 Clinical Flame Photometer in mmol/l without the need to prepare a standard curve. The Model 805 Clinical Diluter is ideal for diluting such samples and the dilution ratios are 200:1 for serum Na and K and 50:1 for Lithium
The principles of flame emission spectroscopy were first investigated by Kirchoff and Bunsen (1860s). In the 1920s Lundengardh refined the technique by incorporating a nebuliser and electro optical detector which paved the way to modern quantitative analysis.
Our predecessor company Evans ElectroSelenium Ltd (EEL) developed the first Model 100 Flame photometer in the late 1940s and the Model 410 Flame Photometer is the latest single channel Flame Photometer in that line.
Key Application Areas
Flame Photometry its the technique of choice for the measurement of Na, K and Ca in all sample types in:
Sherwood Scientific has a "Guide to Flame Photometric Analysis" and a library of applications for all these areas
A source of clean dry pulse-free compressed air at a pressure of 12-15 psi is essential for the Model 410 Flame Photometer. Sherwood recommends the Model 851 Compressor. For areas of high temperature and humidity the Model 855 incorporating a moisture trap is available as an accessory.
The Model 410 Flame Photometer will run on Butane, Propane, or a mixture of the two, and Natural gas. A Primary Regulator at the gas source is required and can be supplied by Sherwood. The secondary regulator is built-in to the Model 410 Flame Photometer
The Sherwood Advantage
Specification of the Model 410 Flame Photometer:
Sensitivity : To display minimum of 100 units, Na <0.5 ppm, K <0.5 ppm, Li 5 ppm, Ca 5 ppm, Ba 200 ppm
Specificity: For Na, K, Li interference is less than 0.5% of the concentration of Na, K, Li, Ca or Ba, equal to the concentration under analysis
Linearity: Better than 2% mid range with Na=3ppm, K=3ppm, or Li=5ppm
Drift: ( To be measured after 30 mins warm up): Zero Drift better than 2% per hour when calibrated with Na=10ppm
Reproducibility: 1 % CV from the same Bulk sample for 20 determinations at Na and K=10ppm .
Limit of Detection: <20 ppb Na and K
Time to Stability: Aspirate for 20 secs.
Aspiration Rate: Variable 2-6 mls /min
Flame Photometer Retail Price List