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Estimated Delivery
Mar 10 - Mar 17
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Free standard shipping on orders over $99
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
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The Model 420 is an easily adaptable accessory for flame AA spectrophotometers that allows PPT detectability for As, Se, Sb, Sn, Te, Bi, and Ge using standard hydride generation procedures. Using inert Polymer components and a reliable pumping system, users can quickly switch between flame and hydride.
Allows superior detection limits for hydride metals compared to graphite furnace AAS, typically in the 100-500 PPT.
Does not require hydrogen gas.
Easy installation and removal for changing back to flame operation.
Four order of magnitude dynamic range using the Buck model 210/211 system for highest accuracy over a wide range of sample concentrations minimizing dilutions and errors.
Inert tubing gives rapid equilibration time allowing typical throughputs of 50 samples per hour with reproducibilities of better than 2% at the 500 PPT level.
Note: For all International Orders, the buyer will be solely responsible for the customs clearance, duty, and taxes imposed on the package.
Element |
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Arsenic (As) |
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Bismuth (Bi) |
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Antimony (Sb) |
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Selenium (Se) |
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Tin (Sn) |
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Tellurium (Te) |
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EPA - method - 206_3 - Arsenic AA - Gaseous-Hydride.pdf
Sub PPB arsenic and selenium detection via Flame Atomic Absorption
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