Individual Test Kits- Ind

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Material Safety Data Sheets

 

Acidity - CODE 7182

 

A standard base titrates acidity to the phenolphthalein endpoint.

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Alkalinity - CODE 4491-DR

 

Kits use titrations with standard acid to the phenolphtalein (P) and/or total (T) alkalinity endpoint.

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Aluminium - CODE 3569

 

A pink to red colour will form when aluminium reacts with Eriochrome Cyanine R, at pH 6.

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Ammonia Nitrogen - CODE 3304

 

Two colorimetric methods are available. Nessler's reagent reacts with ammonia to form a yellow to brown colour; salicylate reacts to form a blue colour, which in combination with the yellow reagent colour produces colours from yellow to blue.

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Arsenic - CODE 4053-02

 

The procedure requires about 15 minutes and employs a test strip.

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Bromine - CODE 6955

 

Bromine may be tested using colour development with DPD, or by a ferrous ammonium sulfate titration in the prescence of DPD indicator.

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Cadmium - CODE 7839-01 P-53

 

EDTA tiration is used for all hardness determinations, with a red to blue endpoint. Both total and calcium buffers include inhibitors to eliminate metal interferences.

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Carbon Dioxide - CODE 7297-DR

 

A standard alkali is used to titrate samples to the phenolphthalein endpoint.

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Caustic - CODE 7516-DR

 

A sample is reacted with barium to precipitate any carbonates, then is titrated with a standard acid to the phenolphthalein endpoint.

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Chelant - CODE 7144/7143

 

Free chalent is determined with barium to precipitate any carbonates, then is titrated with a standard acid to the phenolphthalein endpoint.

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Chloride - CODE 3468

 

The argentometric method is used with all kits. This employs a chromate indicator and silver nitrate titrant.

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Chlorine - CODE 3308

 

Free, Combined and Total Chlorine may be determined using DPD with either colormetric or titrimetric methods.

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Chlorine Test Papers - CODE 4250-BJ

 

0, 50, 100, 200 ppm. 200 test papers.

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Chlorine Dioxide - CODE 3592

 

The colorimetric kits use DP to determine chlorine dioxide. Glycine is added in the method to remove free chlorine interferences.

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Chromate - 4430

 

Diphenylcarbazide reacts with chromate (hexavalent chromium) to form a red to violet colour in an acid solution.

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Chromium - CODE 7678-01

 

Total, hexavalent and trivalent chromium are determined by this method. First, the hexavalent chromium is determined by the reaction with diphenylcarbazide. A second sample is heated in the prescence of an oxidiser, to determine total chromium.

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Color - CODE 7523

 

The colour of water is measured by comparing the water to platinum cobalt water standards respresenting APHA Standard Colour Units.

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Copper - CODE 6616

 

A yellow colour is formed when copper reacts with diethyldithiocarbamate (DDC). A blue colour is formed when copper reacts with cuprizone.

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Cyanide - CODE 7387-01

 

The cyanide is first reacted with a chlorine donor to form cyanogen chloride, which then reacts with pyridine-barbituric acid to form a red-blue colour. The test is also applicable as a screening test for concentrations up to 250 ppm.

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DEHA - CODE 4790

 

Diethylhydroxylamine reacts with ferric iron to form ferrous iron, which is then measured by a standard iron test.

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Detergents - CODE 4507

 

Anionic surfactants are extracted with toluene and break up an ion pair, releasing bromphenol. A standard colour reagent is then used determine the concentration.

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Fluoride - CODE 4227-R

 

A red zirconium lake reacts with fluoride to form a colourless solution, which decreases the red colour of the solution in proportion to the concentration.

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Formaldehyde - CODE 6701FMD

 

The colormetric analysis uses a modified Schiff reaction which an acidified pararosaniline and dichlorosulfitomercurate II complex form a violet colour.

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Glutaraldehyde - CODE 7064

 

High concentrations are determined by a titration with sulufric acid after reaction with sulfite.

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Hardness - CODE 3609

 

EDTA titration is used for all hardness determinations, with a red to blue endpoint. Both total and calcium hardness buffers include inhibitors to eliminate metal interferences.

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Hydrazine - CODE 4850 PHZ-R

 

A yellow colour is formed in the reaction of hydrazine and paradimethylaminobenzaldehyde.

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Hydrogen Peroxide - CODE 3188

 

Although peroxide may be tested colorimeterically with DPD, the most common method is iodometric titration using a standard thiosulfate solution. Both methods are offered.

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Iodine - CODE 7253-DR

 

As with many other oxidisers, iodine may be titrated with a standard thiosulfate solution, hence the name iodometric titration.

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Iron - CODE 3318

 

Bipyridyl is ferrous iron indicator that tests total iron after any ferric iron is reduced to ferrous in the sample. Ferrous and ferric may be tested separately by eliminating the reduction step.

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Lead - CODE 3582-PBS

 

The prescence of lead solder is detected by the reaction of a solder sample with with acid and sodium rhodizonate.

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Manganese - CODE 3588-01

 

The 1(-2 pyridylazo)-2-naphthol (PAN) method forms an orange complex with manganese.

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Methylene Bis Thiocyanate (MBT) - CODE 7148

 

MBT is used as a microbiocide in water systems and wood treatment products. The method uses a titration of excess silver ions after their reaction with the thiocyanate.

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Molybdate/Molybedenum - CODE 6628

 

There are three categories three colorimeters and one titration method available.

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Nickel - CODE 7801 P-54

 

Under acidic conditions, nickel reacts with dimethylglyoxime to form an orange-red complex.

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Nitrate Nitrogen - CODE 3319

 

The nitrate is reduced to nitrite by cadmium or zinc and this undergoes diazotization/ coupling to form a pink colour.

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Nitrite Nitrogen - CODE 3352 SL-LNR

 

As with nitrate, the diazotization/ coupling reaction is used to form a pink colour with nitrate.

 

Nitrite Sodium - CODE 7101-DR

 

Sodium nitrite is titrated using one of two methods. After acidifying the sample, permaganate will oxidize nitrite. When all of the nitrite is oxidised, the permanganate turns the sample pink.

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Oxygen - Dissolved - CODE 7414

 

The azide modification of the Winkler method is a modified iodometric titration whereby oxygen, in the prescence of a strong alkali, oxides manganese, which in turn reacts with iodine. This is titrated with a standard thiosulfate solution in the prescence of a starch indicator to enhance the endpoint. Azide eliminates nitrate interference.

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Ozone - CODE 3526

 

DPD reacts with ozone, but any other oxidisers will interfere. The Indigo Trisulfonate method includes a step to eliminate chlorine interferences, but bromine will interfere. It is preferred for the analysis of salt water samples.

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Peracetic Acid / Hydrogen Peroxide - CODE 7191-01

 

This test is a combination of two separate titrations. The first is a cerium titration of peroxide. The second is an iodometric titration of percetic acid.

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Peracetic Acid Test Strip - CODE 3000

 

Available in 2 ranges - 0 - 160 ppm and 0 - 50 ppm.

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pH Test Papers

 

A rolls and strips of testing papers to measure a range of pH levels.

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Phenols - CODE 7824 P-52-R

 

4-aminoantipyrine is oxidised in the prescence of the ortho and meta substituted phenols to form a reddish coloured complex.

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pH

 

pH must be controlled and monitored because it plays an essential role in almost all chemical and biological processes.

pH indicators work in a specific range. Samples with a pH above the range of an indicator may match the highest standard on the comparator; samples below the range may match the lowest standard.

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Phosphate - CODE 3114-01

 

There are 3 colorimetric test methods. In two, a phosphomolybdate complex is reduced by stannous chloride or ascorbic acid to produce a blue colour. In a third phosphate forms a yellow complex with vanadomolybdate.

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Phosphonate - CODE 7625-DR

 

Polyphosphates (acid-hydrolzable or condensed) and phosphonates (organic phosphates) are reverted using the reagents and apparatus in the 7884 Auxiliary Phosphate kit. The polyphosphates require boiling or microwaving with acid and subsequent neutralisation; the phosphonates require the same, but with the addition of an oxidiser in the boiling/ microwaving step. Once reverted to a orthophosphate, any of the tests in the orthophosphate section may be used for analysis.

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Polyphosphates - CODE 7340-R

 

A colorimetric method is available for water where metal interference is unlikely. An excess of iron is added to the solution containing polyphosphate. The iron is complexed and the remaining iron is determined. The polyphosphate concentration is derived from the iron concentration.

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Polyquat - CODE 7056

 

The test is based on the reactions of the cationic polyquat with an anionic polyelectrolyte using Toluidine Blue O as the indicator. The colour change is blue to purple.

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Potassium - CODE 3138 KIW

 

Sodium tetraphenylboron reacts with potassium to form a white precipitate. The turbidity of the solution is proportional to potassium concentration which is measured in a calibrated tube.

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QAC - CODE 3043-DR

 

Two methods are available. A masked bromphenol blue indicator is aded to the sample and turns green. Sodium tetraphenylboron is added to complex the QAC and the colour changes to red. This method is best suited to higher QAC concentrations. A polyelectronic titration, like the one used for polyquat, is used for low to high concentrations.

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Salinity - CODE 7459-01

 

Salinity is based on the concentration of chloride. An argentometric titration with silver nitrate is used to determine the chloride concentration.

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Silica - CODE 4463

 

The heteropoly blue method tests for "molybdate-reactive" silica. The 4463 uses a 1:10 dilution to expand the range of the kit to 100ppm. 

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Sulfate - CODE 7778

 

Barium forms a precipitate with sulfate. The turbidity is measured using a comparator standards or a meter.

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Sulfide - CODE 3322

 

Both kits use the Pomeroy methylene blue method for analysis. The colorimetric method uses colour standards to read total sulfide. Total, dissolved and hydrogen sulfide can be separated in the titration test. The total sulfide is determined using a colour dye which is added to an unreacted sample untial it matches a reacted sample.  The same procdure is used for dissolving sulfide, after insoluable matter is removed by aluminium floc. Hydrogen sulfide is determined by a pH correction factor.

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Sulfite - CODE 7175-DR

 

An iodide-iodate titrant oxidises sulfite under acid conditions, until all of the sulfite is reacted. The titrant then reacts with starch to form a blue colour signifying the endpoint.

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Tannin / Lignin - CODE 7831 TL

 

Tungstophosphoric and molybdophosphoric acids are reduced by tannins and lignins to form a blue colour.

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Tolcide PS Biocide - CODE 4-8776

 

This kit was developed for the determination of tetrakishydroxymethyl phosphonium sulfate (THPS). The iodometric titration may be used for fresh or salt water in oilfields, towers, pulp and paper, etc.

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Zinc - CODE 7391-01

 

In a solution buffered to pH 9, zincon reacts to form a blue colour.

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