CRM Solutions

How to Digest 316 Stainless Steel for ICP Analysis Using the ColdBlock Digestion System

[fa icon="calendar'] Jan 30, 2018 5:40:25 PM / by Dave Coler posted in stainless steel alloys, icp sample preparation

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The ColdBlock system uses infrared radiation to rapidly digest metal alloy samples and a cooling block to condense out escaping vapors minimizing the loss of volatile elements.  Our preliminary results, detailed in a previous blog post (A New Sample Preparation Technique for  Metal Alloys), looked promising so we are now conducting validation studies with IARM CRM’s of various alloys.  This post details our validation study using CRM IARM 5I, a Grade 316 stainless steel alloy.

Digestion Procedure

5 separate 0.5g aliquots of CRM IARM 5I were prepared using 20ml of aqua regia in a quartz digestion tube.  The 5 digestion vessels were loaded into a 6 position ColdBlock digestion system and digested for 15 minutes at 28% power.  The digested samples were diluted to a total volume of 50ml using deionized water and transferred to a centrifuge tube.  1 ml of HF was then added to each centrifuge tube to stabilize the solution. The samples were then analyzed on a Spectro Arcos ICP-OES in our laboratory.  The results are detailed below.  The reproducibility of each of the 5 digestions is very good, and the average values agree well with the certified values for all elements including Si and volatile elements such as As and S.     We will be posting the resuts of  validation studies on other alloys in the near future so subscribe to our blog to be sure you are automatically notified.

If you would like to learn more about this technology you can visit our product page Learn More


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Positive Material Identification

[fa icon="calendar'] Jan 23, 2018 4:00:00 AM / by Dave Coler posted in XRF, positive material identification

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Positive material identification or PMI is the  verification of metal alloys based on their chemical composition.  This methodology is used for a wide range of applications where the grade of metal alloy used in a particular application needs to be confirmed.  PMI is used in a wide range of applications, but most commonly in industrial settings where using the wrong metal alloy grade  can result in premature corrosion or even failure creating a potentially serious safety hazard.  The chemical verification of alloys already being used in industrial applications often requires that the analysis be non -destructive and performed insitu.  This is most commonly performed using a handheld XRF unit often called a "PMI gun" or portable OES instrument.  

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Raising the Bar for Nickel Alloy CRM's

[fa icon="calendar'] Jan 16, 2018 4:00:00 AM / by Dave Coler posted in nickel alloys

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ARMI is proud to release 10 new Nickel alloy CRM's for chemical analysis.   These CRM's have expanded  data for both certified and indicative  elements.                                                                                                   

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New ARMI Analytical Capabilities

[fa icon="calendar'] Dec 20, 2017 2:53:35 PM / by Dave Coler posted in WDXRF, Custom Reference Materials, ICP

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LGC ARMI now has new analytical capabilities including ICP-OES, ICP-MS and WDXRF in our Manchester, NH facility.  Our ISO 17025 laboratory is also equipped with the new ColdBlock rapid digestion system as well as other conventional sample preparation equipment.

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AISI Grades 1045, 4130, 4820 and ASTM A36 Now Available

[fa icon="calendar'] Dec 5, 2017 2:42:08 PM / by Dave Coler posted in A36, AISI 4130, AISI 4820, AISI 1045, low alloy steel, carbon steel

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ARMI is pleased to release  four new  steel certified reference materials.  These include; IARM 200D (AISI 1045) ,   IARM 143F (AISI 4130) , IARM 155F (AISI 4820)  and IARM  213D (ASTM A36).   

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New Steel Certified Reference Materials

[fa icon="calendar'] Nov 7, 2017 10:38:12 AM / by Dave Coler posted in carbon steel, low alloy steel, metal CRMs

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ARMI is pleased to announce the release of 5 new steel certified reference materials.  These new reference materials include 5 low alloy steels; AISI grades 4140, 4330, 4340, E52100 and 5Cr ½Mo.

As always these reference materials are available in three different forms depending on your analytical technique; 38mm diameter x 3mm thickness for XRF, 38mm diameter x 19mm thickness for arc spark OES or as chips for analysis by ICP or AA.  

The complete listing of the new reference materials are shown in the table below along with links to the certificates of analysis.  You can also check out our new products page to see all of our latest CRM's.

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Reducing Contamination in the Preparation of Metal Alloys for Analysis by ICP

[fa icon="calendar'] Jul 31, 2017 8:00:00 AM / by Susan J. Evans Norris posted in ICP, Sample Preparation, metal alloys

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We have received several questions regarding the best approach to cleaning solid samples and standards that have been prepared as chips for analysis by a total dissolution technique, such as ICP-OES or ICP-MS. Let’s first discuss common approaches for sampling, and then appropriate methodologies for ensuring chips are clean and free from contamination.

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New Sample Preparation Technique for Metal Alloys

[fa icon="calendar'] Jul 27, 2017 11:24:47 AM / by Dave Coler posted in sample digestion, metal CRMs, icp sample preparation, Microwave digestion

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In a previous blog post “How to prepare metal alloy samples for analysis by ICP-OES or ICP-MS”, my colleague Sue Evans Norris described the traditional methods for the sample preparation of metal alloys by ICP.   At ARMI, we are always looking for ways to improve the status quo and recently discovered a new sample preparation technology for the rapid digestion of metal alloys using short-wave infrared radiation.  This technology, promoted by a Canadian company called ColdBlock, claims their instrument can digest metal alloys faster than current techniques while eliminating the need for dangerous acids such as hydrofluoric and perchloric acid.

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New Nickel Alloy CRM's

[fa icon="calendar'] Jul 21, 2017 4:23:12 PM / by Dave Coler posted in nickel alloys, monel

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 LGC ARMI announces the release of a new set of Nickel alloy Certified Reference Materials.

These include:

As always these reference materials are available in three different forms depending on your analytical technique; 38mm diamater x 3mm thickness for XRF, 38mm diameter x 19mm thickness for arc spark OES or as chips for analysis by ICP or AA. 

 Want to learn more about thes reference materials ?  You can download the certificates of analysis using th hyperlinks above and check out our new products page for information on these and other recently released products.


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New Aluminum SUS available-IARM 220G

[fa icon="calendar'] Jun 28, 2017 4:37:15 PM / by Dave Coler

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Set Up Samples (SUS)

 Set up Samples were described in a previous blog post by Charlie Hodges entitled “How to Choose the Correct Aluminum Reference Material for Your Application” but in general, they are homogeneous reference materials used for daily drift correction or standardization or slope correction, typically for arc spark optical emission spectroscopy.  These materials are homogeneous and are usually provided with a certificate of analysis showing the approximate chemical composition but differ from a certified reference material in that there is no supporting statistical data.   These types of materials offer a low cost alternative to consuming expensive CRM’s for daily drift correction.

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