Summary report for the interlaboratory round robin on the MCC-1 static leach test method

Technical Report · Mon Mar 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/5430287· OSTI ID:5430287

Johnston, J W; Daniel, J L

The MCC-1 Static Leach Test Method Round Robbin (RR) was conducted by the Materials Characterization Center (MCC) over a period of 15 months, 1980-82. A total of 25 laboratories provided data in connection with the RR. All together these laboratories tested 769 waste form specimens using the 1980 draft of MCC-1. The specimens tested were approximately one gram wafers cut by the laboratory from samples provided by MCC: NBS borosilicate glass; core dillings of basalt from the Hanford Reservation; and MCC Type 76-68 simulated waste glass. These specimens were tested for 3, 7, 14, 28 days in ovens at 90/sup 0/C using three different leachants. The resulting leachates were analyzed for elemental concentrations, and elemental mass losses were calculated. The specimens were weighed before and after leaching to determine specimen mass loss. This summary report on the round robin has two major parts: Part I provides plots of the data (which are listed in an Appendix) and summary statistics so that the participating laboratories can compare performance with other laboratories. From these plots and summaries, each laboratory also can identify its problem areas. Part II discusses the statistical analysis of the data, and characterizes the precision of the MCC-1 Static Leach Test Method at the time the RR was conducted. The precision characterization indicates that the MCC and waste form community need to institute tighter control of MCC-1 and similar testing practices to reduce the impact of between-laboratory differences on statistical comparisons.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5430287
• Report Number(s): PNL-4249; ON: DE82015491
• Country of Publication: United States
• Language: English

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BASALT
BOROSILICATE GLASS
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DISSOLUTION
GLASS
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SOLID WASTES
SOLIDIFICATION
STATISTICAL DATA
VOLCANIC ROCKS
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WASTES