The containersmustbe properlylabelledincluding relevant product informa-
tion,safetysymbols and phrasesand batch identification, and the bulkdelivery
has to be accompanied by proper documentationgivingthe required information
for identification,safe storageand handlingas wellas potentialhazards.
An additionalanalytical identification of the products mayserve onlyquality
assurance reasonsin caseof the productsin containers, drumsand transi-tanks.
Regarding bulkdeliveries that are pumped into customer-ownedholdingtanks
still containing certainamountsleft fromthe last delivery, it is alsoa safety
measure to identify the product beforepermission for pumping is given.
Especially in the second caseit willnot be possibleto run time-consuming
analysis whilekeepingthe transport driverwaiting.
Reliable, rapid methods for the identification of deliveries (incominggoods)
Measuring pH
Solution pH can be measuredcorrectlyonly in highlydiluted solutions,because
onlyin this caseis is possible to measurethe hydrogenion concentration
properly, because the physicallawsregulating pH measurement can onlybe
appliedto ratherdiluted solutions.At higher concentration,especially in very
concentrated products, the measured pH becomes increasingly unreliable
because overlapping physical effects occur. Therefore, it is important to
measure the pH in solutionsdilutedusingwaterof a consistentwaterquality.
Preferably, demineralisedwatershouldbe used.
Table39.4 Disinfectants
Ingredient Example Purpose
Disinfectants Hypochlorites Killingof microorganismsby complexreactionson
Peroxides eitherthe outsideor insideof the microbialcell.
Quaternary
ammonium
compound(QAC)
Ampholytes
pH-regulators,Bases ProvideoptimumpH for the activebiocide,
buffers Acids stabilisethe pH duringapplication,e.g. to controla
Salts corrosionrisk withoxidisingdisinfectantsor to
provideproductstabilityin solutionor in
concentratedform.
Surfactants Non-ionicor Improvewetting,enhancebiocidalefficacyor
anionic enablefoamapplications.
surfactants
Defoamers Hydrophobic Controlfoamingduringapplication.
non-ionics
Stabilisers Hydrotrophic Stabiliseliquidformulationsat highand/orlow
substances temperatures.
Traceabilityof disinfectants and sanitisers 677