| 品牌：美国博科 | 型号：420&1081 | 类型：多元素分析仪器 |
| 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.
Features:
? 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 |
Example for detection limits for the
Buck Model 420 Hydride System
Results Based on data from optimizedmodel 210VGP
Wavelength波长Minimum.最小量Typical RSD
Element (ABS)D.L. at 10 PPB
Arsenic (As) 193.7 nm0.15 PPB 1.5%
Bismuth (Bi) 223.1 nm0.25 PPB2.1%
Antimony (Sb) 206.8nm0.20 PPB 1.8%
Selenium (Se) 196.0nm0.35 PPB 2.6%
Tin (Sn) 286.3nm 1.0 PPB 8.5%
Tellurium (Te) 214.3nm 0.30 PPB 3.1%
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