salifert magnesium test direction help

[masonicman]

I think I may have been testing for magesium with the salifert kit incorrectly. I just want to make sure I'm reading it right. The direction state to.

1 Place the plastic tip firmly on the 1 ml syringe and draw into this Mg-3 reagent until the lower end of the black syringe part is at the 1.00 ml mark.

2 Hold the syringe with the tip facing upward and read the position of the upper end of the black scringe part.

My question for direction #1 is? When the syringe is in the reagent 3 and I am drawing it up into the syringe. Which part of the black syring part is the lower end? Is it the part closer to the yellow plastic tip?

My question for direction #2 is. When I hold the syringe with the yellow tip facing up. Which part of the black part is the upper end. Is it the black part closer to the yellow tip again?

 

[Ronny#66]

Did you get my 2nd pm

 

[Ronny#66]

i find salfert difficult to use. Got one from Dr. Foster & Smith and there direstions were nothing like what was sent. You need to be shemist to understand them.I don't like salfert.

 

[Ronny#66]

How ya like em typos ?

 

[kau_cinta_ku]

yes your correct on both of your questions.

 

[zotzer]

In both cases, it's the end that is in contact with the solution in the syringe.

Tracy

 

[asm481]

Actually you could use any point toward the end of the syringe. Just use the same point as the starting (1.00) as you do to find the end point. You are measuring the difference here, not the actual quantity in the syringe.

 

[masonicman]

Ok thanks. One thing about being a Test Engineer. I tend to read too much into things

 

[lark]

<a href=showthread.php?s=&postid=11626522#post11626522 target=_blank>Originally posted</a> by zotzer
In both cases, it's the end that is in contact with the solution in the syringe.

Tracy

Very nice. I was trying to think of a way to explain this in less than 100 words. You did it in 16.

 

[Nanz]

<a href=showthread.php?s=&postid=11627292#post11627292 target=_blank>Originally posted</a> by asm481
Actually you could use any point toward the end of the syringe. Just use the same point as the starting (1.00) as you do to find the end point. You are measuring the difference here, not the actual quantity in the syringe.

Exactly!

Thats also the reason it does not matter if there is air trapped between the liquid and the stopper, but you don't want any air bubbles between the liquid and the syringe tip.