1000ug/mL SELENIUM (+4) 500mL

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SKU: CGSE(4)1-500ML

1000ug/mL SELENIUM (+4) 500mL

Description/ Intended use

Speciation has been defined as ‘the distribution of an element amongst defined chemical species in a system’. Chemical species include isotopic composition, electronic or oxidation states and molecular structures. Speciation analysis is the analytical process of identifying and/or measuring the amounts of one or more individual chemical species in a sample.

Why is speciation important?
Speciation analysis has become important for food, environmental, and pharmaceutical industries, where simply measuring the total amount of an element is insufficient. Identifying the different species and concentrations of those species provides a more informed understanding of the environmental or health related impact associated with a particular sample. The clinical or environmental approach would be very different depending on the concentration of the toxic species. For example, an exposure to toxic inorganic arsenic (arsenite and arsenate) is a much bigger concern than an exposure to the mildly toxic organic arsenic species. In contrast, organic mercury species are more toxic than inorganic mercury species, so an exposure to methylmercury or ethylmercury poses a more severe health risk.

How is speciation analysis performed?
IC-ICP-MS provides a complete inorganic elemental analysis solution for speciation analysis.

-Metal-free ion chromatography (IC) separates the individual ionic species without contributing trace metal contamination
-Ion Chromatography-Inductively Coupled Plasma Mass Spectrometry (IC-ICP-MS) performs trace elemental detection and quantification

Metal-free IC (with high resolution ion exchange columns and simple online connectivity) together with high sensitivity ICP-MS and integrated software are a powerful combination for fast and efficient metal speciation.


Selenium Expanded View

Selenium

Location:  Group 16, Period 4
Atomic Weight:  78.96
Coordination Number:  6
Chemical Form in Solution:  H2SeO3

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:  Soluble in HCl, HNO3, H3PO4, H2SO4 and HF aqueous matrices and water. It is stable with most inorganic anions but many cationic metals form the insoluble selenites under pH neutral conditions. When fluorinated and/or under acidic conditions precipitation is typically not a problem at moderate to low concentrations.

Stability:  2-100 ppb levels stable for months alone or mixed with other elements at equivalent levels in 1 % HNO3 / LDPE container. 1-10,000 ppm solutions chemically stable for years in 1-5% HNO3 / LDPE container.

Se Containing Samples (Preparation & Solution):  Metal (soluble in HNO3); Oxides (readily soluble in water); Minerals and alloys (acid digestion with HNO3or HNO3 / HF); Organic Matrices (acid digestion with hot concentrated H2SO4 accompanied by the careful dropwise addition of H2O2 until clear).

Atomic Spectroscopic Information:  (red text indicates severe at ~ concs.)
Technique / Line Estimated D.L.* Order Type Interferences
ICP-OES 196.026 nm 0.08/0.006 µg/mL 1 atom Fe
ICP-OES 203.985 nm 0.2/.05 µg/mL 1 atom Sb, Ir, Cr, Ta
ICP-OES 206.279 nm 0.3/.16 µg/mL 1 atom Cr, Pt
ICP-MS 82 amu 200 ppt n/a M+ 12C35Cl2
*ICP-OES D.L.'s are given as radial / axial view

Selenium (Se) Standards In Our Store

Product Specifications

  • Part #:

    CGSE(4)1-500ML

  • Description:

    1000ug/mL SELENIUM (+4) 500mL

  • Matrix:

    2% v/v Nitric Acid

  • Starting Material:

    Se metal

Every Inorganic Ventures CRM is sold in patented TCT packaging giving your product up to 3 years shelf life. Read more...

 
    • Analyte
    • µg/mL
    • Se+4
    • 1000
 
Documentation:
 

Associated Certifications: ISO 17034 | ISO 17025

 

Only Inorganic Ventures can give you ALL of these.....

Traceable to NIST SRMs
Produced under ISO 17025
Produced under ISO 17034
Assayed by validated wet chemical procedures
Assayed by validated ICP-OES procedures
Trace metallic impurities determined by ICP and ICP-MS

And up to 3 YEARS SHELF LIFE with TCT packaging