ARMI is pleased to announce the release of 7 new products that cover 5 steel alloy grades.
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.
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
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.
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.
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.
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).
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.
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.
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.