Neptune Trident Magnesium differs from ICP

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ekandler

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I have done a couple ICP tests over the past 6 months and noticed each time my Mag is 100 off between my Trident and my ICP tests. Has anyone else noticed this? I calibrate my Trident with every 2 month reagent change and my Trident has never read as high as 1500 but my ICP tests all come back that high. Not sure if a 100 difference is a huge issue or not, just something that caught my eye as a constant offset.

ICP Results.PNG Trident Mag Reading.PNG
 
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MnFish1

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I have done a couple ICP tests over the past 6 months and noticed each time my Mag is 100 off between my Trident and my ICP tests. Has anyone else noticed this? I calibrate my Trident with every 2 month reagent change and my Trident has never read as high as 1500 but my ICP tests all come back that high. Not sure if a 100 difference is a huge issue or not, just something that caught my eye as a constant offset.

ICP Results.PNG Trident Mag Reading.PNG
It is not a significant difference IMHO. I would not let it concern me
 

MnFish1

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You don't think ±100ppm isn't a significant difference?
You would have to check with each company - but - I would not be concerned about to. any 2 measurements are going to have a 'margin of error' or 'accuracy and precision'. Unless you take a third or more measurements - how would you be able to tell 'which is the right one'? I personally would not worry about it
 
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