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News from the Lab
Corporate Relocation
We are pleased to announce that Inorganic Ventures will be relocating its U.S. base of operations from Lakewood, New Jersey to Christiansburg, Virginia. A state-of-the-art, multi-million dollar manufacturing facility is to be constructed within the year, bringing jobs and business opportunities to the surrounding community. More »
PittCon 2008
Join Inorganic Ventures at this year's Pittsburgh Conference and Expo in New Orleans. We'll be exhibiting from March 3-6—stop by Booth 3113 to receive a free gift!
Analytica 2008
Inorganic Ventures will also be exhibiting at Analytica 2008 in Munich, Germany. The exhibition will take place between April 1-4. Please visit us at Hall A2, Booth 425 and say hello.
New Catalog
Inorganic Ventures’ new catalog is here! Products include ready-to-ship standards for ICP, ICP-MS, IC, AA, and wet chemistry. Items are indexed by catalog number and subject, making it quick and easy to find exactly what you need.
Request your copy today!
Analytical Quick Tip
When making a determination of an ICP's performance characteristics, be sure to select the lines to be studied for each element ('lines' is used here to mean either wavelength or mass). Line selection is based upon spectral interference issues, detection limit requirements, and working range requirements. Select as many lines as possible within practicality for each element. The greater the number of lines, the greater the flexibility.
Expressing Sensitivity
In analytical chemistry, sensitivity is the slope of the calibration curve. For ICP applications, it is expressed in counts/concentration units. When analysts are thinking about sensitivity, they use a language that expresses sensitivity in terms of detection limits (DL) rather than sensitivity units (S = counts /conc. units). DL is used because S has little value in making relative comparisons. It is much more to the point to speak in terms of DL rather than S. However, there is a relationship between S and DL. The relationship between the two is dependent upon the definition of DL. A popular definition of DL for ICP that incorporates sensitivity (S) is:
DL = (3(std. dev. of noise in counts)) ÷ S
Using the above equation, the DL is expressed in the concentration units of choice. Using ICP as an example, a common concentration unit is ppm = micrograms of analyte/gram solution. Therefore, an analyst will state that a technique that has a DL of 0.001 ppm is 100 times more sensitive than a technique with a DL of 0.1 ppm. On a practical level, we think of sensitivity in terms of DL, even though we need to measure S to calculate the DL.
Controlling Transpiration · NEW ·
Can container transpiration be controlled? Dr. Gaines discusses the problem and our work toward finding a solution.
Sample Preparation Guide: The Rare Earth Elements
The eighth installment of our Sample Preparation Guide discusses detailed preparation tips for samples containing any of the Rare Earth elements.
*** Next installment to be posted mid-March ***
ICP Operations Guide · COMPLETE ·
A clear 16-part online guide intended for anyone preparing samples and standards for measurement using ICP. Topics cover many day-to-day tasks required by all operators.
Reliable Measurements: A Guidebook for Trace Analysts · COMPLETE ·
An essential 17-part online guide for chemical analysts. Topics cover all phases of sample collection, preparation, measurement, and data analysis.
IV Line Humor
Q: What did one ion say to the other?
A: I've got my ion you.
Submitted by Sharon Sherman, NJ
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| Product Showcase |
Conductivity Standards - Inorganic Ventures offers its line of NIST-traceable con-ductivity standards, spanning the range of 10 µmhos/cm to 100,000 µmhos/cm, certified at 25 °C. These reference materials are conveniently shipped the day they're order-ed. Additionally, custom conductivity standards are available upon request. View products »
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| Elemental Spotlight |
Titanium
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 concentrated HCl, HF, H 3PO 4, H 2SO 4, and HNO 3. Avoid neutral to basic media. Unstable at ppm levels with metals that would pull F - away (i.e. - do not mix with Alkaline or Rare Earths or high levels of transition elements unless they are fluorinated). Stable with most inorganic anions with a tendency to hydrolyze forming the hydrated oxide in all dilute acids except HF.
Stability: 2-100 ppb levels stable (alone or mixed with all other metals) as the Ti(F) 6-2 for months in 1% HNO 3 / LDPE container. 1-10,000 ppm single element solutions as the Ti(F) 6-2 chemically stable for years in 2-5% HNO 3 / trace HF in an LDPE container.
Ti Containing Samples (Preparation & Solution): Metal (soluble in H 2O / HF CAUTION - powder reacts violently); Oxide - low temperature history anatase or rutile (dissolved by heating in 1:1:1 H 2O / HF / H 2SO 4); Oxide - high temperature history {~ 800°C} brookite (fuse in Pt 0 with K 2S 2O 7); Ores (fuse in Pt 0 with KF + K 2S 2O 7 - no KF if silica not present); Organic Matrices (dry ash at 450°C in Pt 0 and dissolve by heating with 1:1:1 H 2O / HF / H 2SO 4 or fuse ash with pyrosulfate if oxide is as plastic pigment and likely in brookite crystalline form).
Excerpt from Inorganic Ventures' Analytical Periodic Table: Includes detailed analytical data for more than 70 elements.
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