THE PERFECT STANDARD. Emerged By Consensus. We can all agree that the value of any standard is directly related to its level of documentation.The more you know about the standards you use, the greater your confidence. Only APG brings you the first true consensus laboratory standards for environmental analysis. APG Setpoint Laboratory Standards™1 are verified in a unique nationwide round-robin program which includes over five hundred laboratories. The data you get is the data you need for your analysis: True Values, Means, Standard Deviations, Number of Laboratories, and Confidence Intervals.
Frequency Distribution-Chromium
It's all there with no estimates based on prior studies, no unexplained Certified Values, no extra charges. For developing QC charts, solving problems, or evaluating commercial laboratories, Setpoint Laboratory Standards are your best choice for external quality control. Only APG can give real world interlaboratory Means and Deviations based upon the strength—and numbers—of our unmatched database. Hundreds of labs throughout the U.S. and Canada currently rely on Setpoint Laboratory Standards for their environmental quality control. You can too. Call today.
Certified Reference Material Setpoint Laboratory Standards are verified in a nationwide interlaboratory program. The data supplied with this standard was developed based upon analysis of the standard in this program. Laboratories reporting data analyzed this sample as an unknown. Standard: Trace Metals Parameter: Chromium
1-800-272-4442 The Measure ol Quality.
Lot No. 7749 Units: ug/L
Interlaboratory Data True Value: 119.65 Mean of Reporting Laboratories: 119.462 Actual Standard Deviation: 8.678 Standard Error of the Mean: 0.919 Number of Laboratories Reporting: 89 Average % Recovery: 99.842 95% Confidence Limit: 102.45-136.47 99% Confidence Limit: 97.07-141.85
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