Test Procedures
MERCURY
TMK METHOD • CODE 4861
QUANTITY
CONTENTS
CODE
50
*TMK Tablets
*4862-H
2 x 250 mL
*Propyl Alcohol
*4863-K
250 mL
*Acetate Buff er
*4864-K
1
Tablet Crusher
0175
1
Test Tube, 10 mL, glass, w/cap
0778
1
Pipet, 1.0 mL, plastic
0354
1
Pipet, 0.5 mL, plastic
0353
*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).
Mercury occurs in small amounts in soil, streams and groundwater. It is used in the
production of amalgams, mirror coatings and measuring devices such as thermometers,
barometers and manometers. Pharmaceuticals and paints contain mercury. It is also used
in fungicides and pesticides and as a mold retardant on paper. Some forms of mercury are
very toxic and can accumulate in the aquatic food chain.
APPLICATION:
Drinking and surface waters; domestic and industrial
wastewater.
RANGE:
0.00–1.50 ppm Mercury
MDL:
0.02 ppm
METHOD:
Mercuric ions (Hg
+2
) form a colored complex with 4, 4’-bis
(dimethylamino) thiobenzophenone (Thio-Michler’s ketone,
TMK) at pH 3.
SAMPLE HANDLING &
PRESERVATION:
Analyze sample as soon as possible. If sample must be
stored, treat with HNO
3
to reduce th pH to less than 2 and
store in a glass container.
INTERFERENCES:
Palladium and other noble metals (gold, platinum, rhodium,
iridium, ruthenium), iodide and reducing agents such as
hydroxylamine hydrochloride, ascorbic acid, sulfi te and
thiosulfate. Interference due to silver is eliminated if chloride
is present.
SMART Spectro 2 Test Procedures 05.02.16
MERCURY
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