InstructionNumber:5807
Component Description
> DROPTEST
>FAS‐DPDCHLORINE(FREE&COMBINED)(1drop=0.2ppm)
> MONOPERSULFATECOMPOUND(1drop=0.2ppm)
> (USEWITHR‐0870)
NOTE:Thisprocedurewillselectivelydeterminefree
chlorine,combinedchlorine,andmonopersulfate(not
persulfate).Todeterminemonopersulfateitisfirst
necessarytodeterminebothfreeandcombinedchlorine,
ifpresent.
Chlorine(Free,Combined)Test
1. Rinseandfillsampletubeto25mLmarkwithwaterto
betested.
2. Add1heapingdipperR‐0870andQUICKLYswirltomix.
IMMEDIATELYadd1.0mLR‐0867andQUICKLYswirltomix.
Samplewillturnpinkiffreechlorine(FC)ispresent.
3. AddR‐0871dropwise,swirlingandcountingafter
eachdrop,untilcolorchangesfrompinkto
colorless.Alwaysholdbottleinverticalposition.
NumberofdropsisReadingA.IMMEDIATELYadd10drops
R‐0003.Swirltomix.WAIT1MINUTE.Samplewillturn
pinkifcombinedchlorine(CC)ispresent.
4. AddR‐0871dropwise,swirlingandcountingaftereach
drop,untilcolorchangesfrompinktocolorless.Always
holdbottleinverticalposition.Numberofdropsis
ReadingB.
5. MultiplyReadingAby0.2.Recordasppmfreechlorine
(FC).MultiplyReadingBby0.2.Recordasppm
combinedchlorine(CC).
MonopersulfateCompoundTest
1. Rinseandfillsampletubeto25mLmarkwithwaterto
betested.
2. Add1heapingdipperR‐0870.Swirluntildissolved.
3. Add10dropsR‐0003.Swirltomix.WAIT1MINUTE.
4. AddR‐0871dropwise,swirlingandcountingaftereach
drop,untilcolorchangesfrompinktocolorless.
Alwaysholdbottleinverticalposition.
5. MultiplydropsofR‐0871by0.2.Recordasppmtotal
oxidizer(TO).
6. Tocalculateppmmonopersulfatecompound(MC)aschlorine:
MC=TO‐(FC+CC).Recordasppm.
NOTE:AnegativevalueforMCmaybeobtainedwhenMCis
zero(0)orverylow(0‐0.4ppmaschlorine).This
iscausedbyvariablessuchassamplemeasurement,
dropvariation,etc.
NOTE:Refertomanufacturer'sinstructionsforproper