1000ug/mL CHROMIUM(+6) 125mL

Name: 1000ug/mL CHROMIUM(+6) 125mL
Brand: Inorganic Ventures
SKU: CGCR(6)1-125ML
Price: 57.48 GBP
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SKU: CGCR(6)1-125ML

Vendor: Inorganic Ventures

Categories:

1000ppm Inorganic standards

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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.

Chromium

Location: Group 6, Period 4
Atomic Weight: 51.9961
Coordination Number: 6
Chemical Form in Solution: Cr(H₂O)₆³⁺

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: Stable in HCl, HNO₃, H₂SO₄, HF, H₃PO₄. Avoid basic media. Stable with most metals and inorganic anions in acidic media.

Stability: 2-100 ppb levels stable for months in 1% HNO₃ / LDPE container. 1-10,000 ppm solutions chemically stable for years in 1-5% HNO₃ / LDPE container.

Cr Containing Samples (Preparation & Solution): Metal (soluble in HCl); Oxides / Ores (chrome ore/oxides are very difficult to dissolve. The following procedures A - D are commonly used:

A. Fusion with KHSO₄ and extraction with hot KCl. The residue fused with Na₂CO₃ and KClO₃, 3:1
B. Fusion with NaKSO₄ and NaF, 2:1
C. Fusion with magnesia or lime and sodium or potassium carbonates, 4:1
D. Fusion with Na₂O₂ or NaOH and KNO₃ or NaOH and Na₂O₂.

Nickel, iron, copper, or silver crucibles should be used for D. Platinum may be used for A, B, and C; Organic Matrices (ash at 450°C followed by one of the fusion methods above or Sulphuric / hydrogen peroxide acid digestions may be applicable to non oxide containing samples).

Atomic Spectroscopic Information: (red text indicates severe at ~ concs.)

Technique / Line	Estimated D.L.*	Order	Type	Interferences
ICP-OES 205.552 nm	0.006/.0008 µg/mL	1	ion	Os
ICP-OES 284.325 nm	0.008/.0007 µg/mL	1	ion
ICP-OES 276.654 nm	0.01/.001 µg/mL	1	ion	Cu, Ta, V
ICP-MS 52 amu	40 ppt	n/a	M^-	³⁶S¹⁶O, ³⁶Ar¹⁶O**
ICP-OES D.L.'s are given as radial / axial view *The ⁵⁰Cr, ⁵³Cr, ⁵⁴Cr lines suffer from many more potential interferences from Sulphur, chlorine, and argon compounds of oxygen, nitrogen, and carbon.
Chromium (Cr) Standards In Our Store

Product Specifications

Part #:

CGCR(6)1-125ML
Description:

1000ug/mL CHROMIUM(+6) 125mL
Matrix:

Water
Starting Material:

(NH₄)₂Cr₂O₇

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

- Analyte
- µg/mL
- Cr⁺⁶
- 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