1000ug/mL TUNGSTEN 125mL for AA

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SKU: AAW1-125ML
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Tungsten Expanded View

Tungsten

Location:  Group 6, Period 6
Atomic Weight:  183.85
Coordination Number:  6, 7, 8, 9
Chemical Form in Solution:  WOF5-2 (chem. form as received)
(coordination numbers in green are observed less frequently)

Storage & Handling:  Keep tightly sealed when not in use. Store and use at 20 ± 4°C. Do not pipet from container. Do not return portions removed for pipetting to container.

Chemical Compatibility:  W is very readily hydrolyzed requiring 0.1 to 1% HF for stable acidic solutions. The [WOF5]-2 is soluble in % levels of HCl and HNO3, provided it is in the [WOF5]-2 form. Stable at ppm levels with some metals provided it is fluorinated. Do not mix with Alkaline or Rare Earths. W is best to be mixed only with other fluorinated metals (Ti, Zr, Hf, Nb, Ta, Mo, Si, Sn, Ge). Look for yellow WO3 precipitate if mixed with other transitions at higher levels indicating instability. The yellow WO3 will form over a period of weeks even in trace HF, therefore HF levels of W multi-element blends should be ~ 1%.

Stability:  2-100 ppb levels stable (alone or mixed with all other metals that are at comparable levels) as the [WOF5]-2 for months in 1% HNO3 / LDPE container. 1-10,000 ppm single element solutions as the [WOF5]-2 chemically stable for years in 1% HF in a LDPE container.

W Containing Samples (Preparation & Solution):  Metal (soluble in HF / HNO3); Oxide (soluble in HF or NH4OH); Organic Matrices (dry ash at 450 0C in Pt0 and dissolve oxide with HF).

Atomic Spectroscopic Information:
Technique / Line Estimated D.L.* Order Type Interferences
ICP-OES 207.911 nm 0.03/.001 µg/mL 1 ion Ru, In
ICP-OES 224.875 nm 0.05/.005 µg/mL 1 ion Co, Rh, Ag
ICP-OES 209.475 nm 0.05/.008 µg/mL 1 ion Mo
ICP-MS 182 amu 5 ppt n/a M+ 166Er16O
*ICP-OES D.L.'s are given as radial / axial view

Tungsten (W) Standards In Our Store

Product Specifications

  • Part #:

    AAW1-125ML

  • Description:

    1000ug/mL TUNGSTEN 125mL

  • Matrix:

    0.2% v/v Nitric Acid / 2% v/v Hydrofluoric Acid

  • Starting Material:

    W metal

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Associated Certifications: ISO 17025

 

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Assayed by validated wet chemical procedures
Assayed by validated ICP-OES procedures

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