Articles by Rick Mathew
ABOUT THE ARTICLE:
The article describes an accurate and precise method and it's development, for measuring the level of Iodine in a saltwater aquarium. It is a follow-up to an article written in 2021. The current article describes an improved method but using the same basic ideas as the 2021...
ABOUT THIS ARTICLE
This article was authored by @Dan_P, @taricha and @Rick Mathew. We collaborated in the development of the experimental methods, the cost of the project and the analysis of the data. The project was started in August of 2021 with the purpose of understanding the quality of the...
Intermediate Topic
SAMPLE STORAGE AND ITS IMPACT ON MEASUREMENT RESULTS PART 3
Well this will be my third trip down this “Rabbit Hole”…One would think I should have learned my lesson, but Noooooo! I jumped back in with both feet! If you are brave enough come with me on my third journey into “Wonderland” then read on!!
In my last post in July of last year I presented the...
PART 4 "GETTING IT RIGHT" COLORIMETRIC INSTRUMENTAL TESTING METHODS (DIGITAL)
As we turn our attention to the use of digital testers (Colorimeters) such as the HANNA CHECKER, most of the same elements necessary for good precision and accuracy that exist in Visual Testing also exist in Digital...
PART 3 -----COLORIMETRIC VISUAL TESTING METHODS (What We See)
SOURCES OF ERROR IN THE ASSESSMENT PROCEDURE
Next we turn to the second component of our testing protocols and that is the ASSESSMENT…What do we see and how do we interpret the results of our testing procedure.
Visual colorimetric...
Advanced Topic
PART 2 -GETTING IT RIGHT--MAKE TESTING COUNT BY USING A QUALITY SYSTEM APPROACH---COLORIMETRIC VISUAL TESTING
PART 2-----COLORIMETRIC VISUAL TESTING METHODS (The Chemistry)
As we covered in Part 1 in the “Understanding Errors” section, the visual testing method consists of essentially two steps, Evaluation and Assessment. Evaluation is the test procedure (The Chemistry) and Assessment is the...
USING HANNA CHECKER HI-707 TO TEST FOR IODINE
In my quest to improve my testing accuracy and precision I found the standard colorimetric tests for Iodine difficult to get any kind of accurate reading and the repeatability (precision) was not very good. Being that I dosed Iodine this made me...
GETTING IT RIGHT! ---MAKE TESTING COUNT BY USING A QUALITY SYSTEM APPROACH
INTRODUCTION
All of us want healthy and thriving Reef Tanks. This necessarily means excellent water quality. So I ask myself. How do I know the quality of my water? The answer of course is I need to test and measure...
TEST METER FOR TESTING NITRATES
Back in October of 2017 I posed about a DIY Test meter …The second post in Jan 2018 expanded the work to look at using the Hanna HI-736 PHOSPHOROUS Checker as the measuring instrument. As I mentioned at the end of the Jan post I was exploring the use of other...
