Test Procedures
SILICA–HIGH RANGE
SILICOMOLYBDATE METHOD • CODE 3687-SC
QUANTITY
CONTENTS
CODE
30 mL
* Silica Reagent #1
*V-4466-G
30 mL
* Silica Reagent #2
*V-4467-G
15 mL
* Silica Reagent #3
*V-4468-G
*WARNING:
Reagents marked with an * are considered to be potential health hazards. To
view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the contents
list or in the test procedures. Omit any letter that follows or precedes the four digit code
number. For example, if the code is 4450WT-H, search 4450. To obtain a printed copy,
contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
Silicon dioxide, SiO
2
, commonly known as silica, occurs in all natural water. Silica may be
present as suspended, insoluble particles in a colloidal or polymeric state. It may also
be present in a reactive form as silicic acid or silicate ions. Silica is a major nutrient for
diatoms. A silica cycle occurs in many bodies of water containing organisms, such as
diatoms, that use silica in their skeletal structure. The silica removed from the water may
be slowly returned to solution by the decomposition of the dead organisms. The major
source of silica in natural water is from the decomposition of silicate minerals in the
drainage basin from which the waters fl ow.
The presence of silica is particularly objectionable in water used for boiler feed water
purposes, as it may cause the formation of a hard, dense scale which has unusually high
resistance to heat transfer. Serious loss of turbine effi
ciency results from insoluble silica
turbine blade deposits caused by vaporization of silica from boiler water.
SMART Spectro 2 Test Procedures 05.02.16
SILICA
, HIGH RANGE
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