Chairman Notes
2023 Sample schedule
New Method for Payments on our Dashboard and the New Lab Portal
Is your Lab Reporting a False Deficiency?
Magruder Celebrates 100 Years
Methods Forum over the Years - Part 1
Vendor's Corner
Upcoming Meetings
Magruder Committee Roster

Spectro's publication on high precision for ICP-OES using bracketing technique

Chairman Notes
Payments for 2022 Enrollment
Data Entry and Reports
Evaluating Laboratory Performance with Magruder Data
Using Control Charts in Quality Assurance
Vendor's Corner
Upcoming Meetings
Magruder Committee Roster

Chairman Notes
Changing Our Name to Proficiency Testing
Magruder Turns 100!
Upgrade of Lab Portal Website
Value of the Magruder Program in a Regulatory Laboratory
Goals of the International Network on Fertilizer Analysis (INFA)
Vendor's Corner
Magruder Committee Roster
Upcoming Meetings

Chairman Notes
Investigational Allowance Defined
IA Ratios
Effects of COVID-19 on Sample Shipments
Committee Changes
Upcoming Meetings
Magruder Committee Roster

Chairman Notes
Investigational Allowances are not Tolerances
Quality Reference Materials
New Sample Schemes Introduced in 2022
Upcoming Meetings