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Search Publications by: Maria Isabel Vega Martinez (IntlAssoc)

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Displaying 1 - 5 of 5

Certification of Standard Reference Material(R) 1568c Rice Flour

January 15, 2026
Author(s)
Laura Wood, Charles Barber, Colleen Bryan Sallee, Monique Johnson, Shaun Kotoski, Stephen Long, Tomohiro Narukawa, Rick Paul, Nicholas Sharp, John Sieber, Maria Isabel Vega Martinez, James Yen, Lee Yu
The National Institute of Standards and Technology (NIST) SRM 1568c Rice Flour has value assignments for over 30 analytes, including arsenic species. This material is intended to be used for the evaluation of methods for the determination of elements and

Comparison of Bulk and Micro Sampling Techniques for the Elemental Analysis of SRM 610 and 612

July 25, 2025
Author(s)
Nicholas Sharp, Maria Isabel Vega Martinez, Ruthmara Corzo, Blaza Toman, Rick Paul, Savelas Rabb, Jack Prothero, Jamie Weaver
The glass Standard Reference Materials (SRM) 610 and 612 are frequently used for microanalysis by the forensic and geological communities. However, SRM 610 and 612 were designed and certified to be used as bulk-scale reference materials for the analysis of

A Comparison of Bulk with Micro-Volume Elemental Values for NIST SRM 610 and NIST SRM 612

June 26, 2025
Author(s)
Nicholas Sharp, Maria Isabel Vega Martinez, Ruthmara Corzo, Blaza Toman, Rick Paul, Jamie Weaver
NIST SRM 610 and 612 (Trace Elements in Glass) are routinely used for microanalytical measurements but were designed to be bulk-scale reference materials. This study investigates an approach to quantify the differences between values for elements obtained

Certification of Standard Reference Material(R) 2693a Bituminous Coal (Nominal Mass Fraction 0.5 % Sulfur)

January 25, 2024
Author(s)
Thomas W. Vetter, Colleen E. Bryan Sallee, Brian Lang, Anthony F. Marlow, Jennifer Ness, Rick L. Paul, Adam L. Pintar, Bruce Scruggs, Nicholas Sharp, Maria Isabel Vega Martinez, John Sieber
Standard Reference Material (SRM) 2693a Bituminous Coal (Nominal Mass Fraction 0.5 % Sulfur) is intended for use in the evaluation of techniques employed in the determination of sulfur, mercury, chlorine, and ash in coal and materials of a similar matrix

Certification of Standard Reference Material(R) 1568c Rice Flour

July 29, 2022
Author(s)
Chuck Barber, Colleen E. Bryan Sallee, Monique Johnson, Shaun Kotoski, Rick L. Paul, Nicholas Sharp, Maria Isabel Vega Martinez, James H. Yen, Lee L. Yu, Laura Wood, John Sieber, Stephen Long
The National Institute of Standards and Technology (NIST) recently released SRM 1568c Rice Flour which has value assignments for over 30 analytes, including arsenic species. This material is intended to be used for the evaluation of methods for the
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