Photometric Tests

For measuring methods in the wavelength range of visible light, i.e. the photometry, high quality products are a must to achieve the best possible test results. For these so-called "transmission measurements" the concentrations of color solutions are determined by using the visible light - this is done in cuvettes.

Therefore cuvette tests are analytical methods with which chemical parameteres of solutions are determined by photometry. Very popular are disposable cuvettes (one use only) which already contain the required solutions in the right amount. Thanks to their simple handling they are often used, particularly in water analysis:

  • sewage treatment plants
  • waterworks
  • breweries
  • dairies

and in many other areas.

At Analytics-Shop you will find numerous cell tests for your lab applications from different manufacturers: Merck Millipore, WTW and Macherey Nagel. If you have any questions about our products, please do not hesitate to contact our staff. Our customer service will be happy to advise you independently and free of charge.

Items 1-50 of 100

Product Image of Ammonium Test Method: photometric 0.010 - 3.00 mg/l NH4-N Spectroquant®, 250 Tests
Ammonium Test Method: photometric 0.010 - 3.00 mg/l NH4-N Spectroquant®, 250 Tests
Item number: MC1147520002
Brand: Merck

In stock

$180.00
Product Image of Tube test NANOCOLOR ECO Ammonium LR, measuring range: 0.01 - 1.80 mg/L NH4-N 0.01 - 2.30 mg/L NH4+, for 100 determinations
Tube test NANOCOLOR ECO Ammonium LR, measuring range: 0.01 - 1.80 mg/L NH4-N 0.01 - 2.30 mg/L NH4+, for 100 determinations
Item number: MN976003
Brand: Macherey-Nagel
$157.20
Product Image of Rectangular cuvettes, 10mm, Spectroquant
Rectangular cuvettes, 10mm, Spectroquant
Item number: MC1149460001
Brand: Merck
$154.80
Product Image of Rectangular cuvettes 50mm Spectroquant
Rectangular cuvettes 50mm Spectroquant
Item number: MC1149440001
Brand: Merck
$432.00
Product Image of Round cell test NANOCOLOR Sulfate HR 1000, 20 determinations
Round cell test NANOCOLOR Sulfate HR 1000, 20 determinations
Item number: MN985063
Brand: Macherey-Nagel
$95.04
Product Image of Pd Matrix Modifier for Graphite Furnace AA, Concentration: 1% Pd (as nitrate), Volume: 50mL
Pd Matrix Modifier for Graphite Furnace AA, Concentration: 1% Pd (as nitrate), Volume: 50mL
Item number: PEB0190635
Brand: PerkinElmer
$413.31
Product Image of Cyanuric Acid Test Method: photometric 2 - 160 mg/l Spectroquant®, 100 Tests
Cyanuric Acid Test Method: photometric 2 - 160 mg/l Spectroquant®, 100 Tests
Item number: MC1192530001
Brand: Merck
$189.60
Product Image of Oxygen Scavengers Test Spectroquant®, 0.020 - 0.500 mg/l DEHA 0.027-0.667 mg/l Carbohy 0.053 - 1.315 mg/l Hydro, 200 Tests
Oxygen Scavengers Test Spectroquant®, 0.020 - 0.500 mg/l DEHA 0.027-0.667 mg/l Carbohy 0.053 - 1.315 mg/l Hydro, 200 Tests
Item number: MC1192510001
Brand: Merck
$216.00
Product Image of COD Cell Test Method: photometric 5.0 - 60.0 mg/l Spectroquant®, for seawater / high chloride contents 25 Tests
COD Cell Test Method: photometric 5.0 - 60.0 mg/l Spectroquant®, for seawater / high chloride contents 25 Tests
Item number: MC1170580001
Brand: Merck
$398.67
Product Image of Nitrate test in seawater Method: photometric 0.2 - 17.0 mg/l NO3-N 0.9 - 75.3 mg/l NO3- Spectroquant®, 50 Tests
Nitrate test in seawater Method: photometric 0.2 - 17.0 mg/l NO3-N 0.9 - 75.3 mg/l NO3- Spectroquant®, 50 Tests
Item number: MC1149420001
Brand: Merck
$189.60
Product Image of TOC Cell Test Method: photometric 50 - 800 mg/l Spectroquant®, 25 Tests
TOC Cell Test Method: photometric 50 - 800 mg/l Spectroquant®, 25 Tests
Item number: MC1148790001
Brand: Merck
$491.68
Product Image of TOC Cell Test Method: photometric 5.0 - 80.0 mg/l Spectroquant®, 25 Tests
TOC Cell Test Method: photometric 5.0 - 80.0 mg/l Spectroquant®, 25 Tests
Item number: MC1148780001
Brand: Merck
$392.40
Product Image of Phosphorus (total) Standard Solution, photometric, PMB 0.0025 - 5.00 mg/l PO₄-P 0.0077 - 15.3 mg/l PO₄ 0.0057 - 11.46 mg/l P₂O₅, 220 Tests
Phosphorus (total) Standard Solution, photometric, PMB 0.0025 - 5.00 mg/l PO₄-P 0.0077 - 15.3 mg/l PO₄ 0.0057 - 11.46 mg/l P₂O₅, 220 Tests
Item number: MC1148480002
Brand: Merck
$232.00
Product Image of Phosphorus (total) Standard Solution, photometric, PMB 0.0025 - 5.00 mg/l PO₄-P 0.0077 - 15.3 mg/l PO₄ 0.0057 - 11.46 mg/l P₂O₅
Phosphorus (total) Standard Solution, photometric, PMB 0.0025 - 5.00 mg/l PO₄-P 0.0077 - 15.3 mg/l PO₄ 0.0057 - 11.46 mg/l P₂O₅
Item number: MC1148480001
Brand: Merck
$329.33
Product Image of Lead Cell Test Method: photometric 0.10 - 5.00 mg/l Pb Spectroquant®, 25 Tests
Lead Cell Test Method: photometric 0.10 - 5.00 mg/l Pb Spectroquant®, 25 Tests
Item number: MC1148330001
Brand: Merck
$166.80
Product Image of Sulfide Test Method: photometric 0.020 - 1.50 mg/l S2- Spectroquant®, 220 Tests
Sulfide Test Method: photometric 0.020 - 1.50 mg/l S2- Spectroquant®, 220 Tests
Item number: MC1147790001
Brand: Merck
$228.00
Product Image of Nitrite Test Method: photometric 0.002 - 1.00 mg/l NO2-N 0.007 - 3.28 mg/l NO2- Spectroquant®, 335 Tests
Nitrite Test Method: photometric 0.002 - 1.00 mg/l NO2-N 0.007 - 3.28 mg/l NO2- Spectroquant®, 335 Tests
Item number: MC1147760002
Brand: Merck
$174.00
Product Image of Iron Test Method: photometric 0.0025 - 5.00 mg/l Fe Spectroquant®, 250 Tests
Iron Test Method: photometric 0.0025 - 5.00 mg/l Fe Spectroquant®, 250 Tests
Item number: MC1147610002
Brand: Merck
$132.00
Product Image of Ammonium Cell Test method: photometric 0.010 - 2.000 mg/l NH4-N 0.01 - 2.58 mg/l NH4+ Spectroquant®, 25 Tests
Ammonium Cell Test method: photometric 0.010 - 2.000 mg/l NH4-N 0.01 - 2.58 mg/l NH4+ Spectroquant®, 25 Tests
Item number: MC1147390001
Brand: Merck
$105.85
Product Image of Hydrogen Peroxide Cell Test Method: photometric 2.0 - 20.0 mg/l H2O2 Spectroquant®, 25 Tests
Hydrogen Peroxide Cell Test Method: photometric 2.0 - 20.0 mg/l H2O2 Spectroquant®, 25 Tests
Item number: MC1147310001
Brand: Merck
$194.40
Product Image of Oxygen Cell Test Method: photometric 0.5 - 12.0 mg/l O2 Spectroquant®, 0.5 - 12.0 mg/l O₂ 25 Tests
Oxygen Cell Test Method: photometric 0.5 - 12.0 mg/l O2 Spectroquant®, 0.5 - 12.0 mg/l O₂ 25 Tests
Item number: MC1146940001
Brand: Merck
$223.20
Product Image of Residual Hardness Cell Test Spectroquant®, 0.7-7 CaO, 1.2-12.5 mg/l CaCO₃ 25 Tests
Residual Hardness Cell Test Spectroquant®, 0.7-7 CaO, 1.2-12.5 mg/l CaCO₃ 25 Tests
Item number: MC1146830001
Brand: Merck
$184.80
Product Image of Formaldehyde Test Method: photometric Spectroquant®, 0.02 - 8.00 mg/l HCHO, 100 Tests
Formaldehyde Test Method: photometric Spectroquant®, 0.02 - 8.00 mg/l HCHO, 100 Tests
Item number: MC1146780001
Brand: Merck
$255.60
Product Image of Fluoride Test Method: photometric 0.10 - 20.0 mg/l F Spectroquant®, 250 Tests
Fluoride Test Method: photometric 0.10 - 20.0 mg/l F Spectroquant®, 250 Tests
Item number: MC1145980002
Brand: Merck
$398.40
Product Image of Fluoride Test Method: photometric 0.10 - 20.0 mg/l F Spectroquant®, 100 Tests
Fluoride Test Method: photometric 0.10 - 20.0 mg/l F Spectroquant®, 100 Tests
Item number: MC1145980001
Brand: Merck
$186.00
Product Image of Zinc Cell Test Method: photometric 0.20 - 5.00 mg/l Zn Spectroquant®, 0.20 - 5.00 mg/l Zn 25 Tests
Zinc Cell Test Method: photometric 0.20 - 5.00 mg/l Zn Spectroquant®, 0.20 - 5.00 mg/l Zn 25 Tests
Item number: MC1145660001
Brand: Merck
$172.80
Product Image of Ammonium Cell Test Method: photometric Spectroquant®, 0.20 - 8.00 mg/l NH₄-N 0.26 - 10.30 mg/l NH₄⁺ 25 Tests
Ammonium Cell Test Method: photometric Spectroquant®, 0.20 - 8.00 mg/l NH₄-N 0.26 - 10.30 mg/l NH₄⁺ 25 Tests
Item number: MC1145580001
Brand: Merck
$112.08
Product Image of COPPER CELL TEST 0.05 - 8.00 MG/L CU SPECTROQUANT, 0.05 - 8.00 mg/l Cu 25 Tests
COPPER CELL TEST 0.05 - 8.00 MG/L CU SPECTROQUANT, 0.05 - 8.00 mg/l Cu 25 Tests
Item number: MC1145530001
Brand: Merck
$122.19
Product Image of Phenol Cell Test Method: photometric 0.10 - 2.50 mg/l Spectroquant®, 25 Tests
Phenol Cell Test Method: photometric 0.10 - 2.50 mg/l Spectroquant®, 25 Tests
Item number: MC1145510001
Brand: Merck
$156.00
Product Image of Iron Cell Test Method: photometric 0.05 - 4.00 mg/l Fe Spectroquant®, 0.05 - 4.00 mg/l Fe 25 Tests
Iron Cell Test Method: photometric 0.05 - 4.00 mg/l Fe Spectroquant®, 0.05 - 4.00 mg/l Fe 25 Tests
Item number: MC1145490001
Brand: Merck
$111.65
Product Image of Nitrite Cell Test Method: photometric, 0.03-2.30 mg/l, 0.03 - 2.30 mg/l NO₂⁻, 0.010-0.700 mg/l NO2-N 25 Tests
Nitrite Cell Test Method: photometric, 0.03-2.30 mg/l, 0.03 - 2.30 mg/l NO₂⁻, 0.010-0.700 mg/l NO2-N 25 Tests
Item number: MC1145470001
Brand: Merck
$109.55
Product Image of Phosphate Cell Test 0.5 - 25.0 mg/l PO4-P Spectroquant®, 0.5 - 25.0 mg/l, 1.5 - 76.7 mg/l PO43- 1.1 - 57.3 mg/l P2O5 25 Tests
Phosphate Cell Test 0.5 - 25.0 mg/l PO4-P Spectroquant®, 0.5 - 25.0 mg/l, 1.5 - 76.7 mg/l PO43- 1.1 - 57.3 mg/l P2O5 25 Tests
Item number: MC1145460001
Brand: Merck
$158.40
Product Image of Nitrate Cell Test Method: photometric Spectroquant®, 2.2 - 79.7 mg/l NO₃⁻, 0.5 - 18.0 mg/l NO3-N 25 Tests
Nitrate Cell Test Method: photometric Spectroquant®, 2.2 - 79.7 mg/l NO₃⁻, 0.5 - 18.0 mg/l NO3-N 25 Tests
Item number: MC1145420001
Brand: Merck
$193.20
Product Image of Sulfite Cell Test Method: photometric Spectroquant®, 1.0 - 20.0 mg/l SO₃²⁻ 25 Tests
Sulfite Cell Test Method: photometric Spectroquant®, 1.0 - 20.0 mg/l SO₃²⁻ 25 Tests
Item number: MC1143940001
Brand: Merck
$183.28
Product Image of Hydrazine Test Method: photometric Spectroquant®, 0.005 - 2.00 mg/l N2H4, 100 Tests
Hydrazine Test Method: photometric Spectroquant®, 0.005 - 2.00 mg/l N2H4, 100 Tests
Item number: MC1097110001
Brand: Merck
$108.49
Product Image of Cyanide Test 0.002 - 0.500 mg/l CN- Spectroquant®, freies und leicht freisetzbares Cyanid, 0.002 - 0.500 mg/l CN⁻, 100 Tests
Cyanide Test 0.002 - 0.500 mg/l CN- Spectroquant®, freies und leicht freisetzbares Cyanid, 0.002 - 0.500 mg/l CN⁻, 100 Tests
Item number: MC1097010001
Brand: Merck
$199.20
Product Image of Surfactants (anionic) Cell Test Method: photometric Spectroquant®, 0.05 - 2.00 mg/l MBAS 25 Tests
Surfactants (anionic) Cell Test Method: photometric Spectroquant®, 0.05 - 2.00 mg/l MBAS 25 Tests
Item number: MC1025520001
Brand: Merck
$201.60
Product Image of Sulfate Test Method: photometric 5 - 300 mg/l SO42- Spectroquant®, 100 Tests
Sulfate Test Method: photometric 5 - 300 mg/l SO42- Spectroquant®, 100 Tests
Item number: MC1025370001
Brand: Merck
$136.80
Product Image of Sulfate Cell Test Method: photometric Spectroquant®, 1.0 - 50.0 mg/l SO₄²⁻ 25 Tests
Sulfate Cell Test Method: photometric Spectroquant®, 1.0 - 50.0 mg/l SO₄²⁻ 25 Tests
Item number: MC1025320001
Brand: Merck
$152.40
Product Image of Sulfate Test Method: photometric 0.50 - 50.0 mg/l SO42- Spectroquant®, 100 Tests
Sulfate Test Method: photometric 0.50 - 50.0 mg/l SO42- Spectroquant®, 100 Tests
Item number: MC1018120001
Brand: Merck
$138.00
Product Image of Chloride Test Method: photometric 0.10 - 5.00 mg/l Cl- Spectroquant®, 100 Tests
Chloride Test Method: photometric 0.10 - 5.00 mg/l Cl- Spectroquant®, 100 Tests
Item number: MC1018070001
Brand: Merck
$312.00
Product Image of Surfactants (nonion.) Cell Test Method: photometric Spectroquant®, 0.10 - 7.50 mg/l Triton® X-100 25 Tests
Surfactants (nonion.) Cell Test Method: photometric Spectroquant®, 0.10 - 7.50 mg/l Triton® X-100 25 Tests
Item number: MC1017870001
Brand: Merck
$201.60
Product Image of Surfactants (cation.) Cell Test Method: photometric 0.05 - 1.50 mg/l CTAB Spectroquant®, 25 Tests
Surfactants (cation.) Cell Test Method: photometric 0.05 - 1.50 mg/l CTAB Spectroquant®, 25 Tests
Item number: MC1017640001
Brand: Merck
$201.60
Product Image of Acid Capacity Cell Test to pH 4.3 (total alkalinity) Spectroquant®, up to pH 4,3 (total alkalinity) 0.40 - 8.00 mmol/l 20 - 400 mg/l CaCO3, 120 Tests
Acid Capacity Cell Test to pH 4.3 (total alkalinity) Spectroquant®, up to pH 4,3 (total alkalinity) 0.40 - 8.00 mmol/l 20 - 400 mg/l CaCO3, 120 Tests
Item number: MC1017580001
Brand: Merck
$220.15
Product Image of Sulfite Test Method: photometric Spectroquant®, 1.0 - 60.0 mg/l SO₃²⁻ 0.8 - 48.0 mg/l SO₂, 150 Tests
Sulfite Test Method: photometric Spectroquant®, 1.0 - 60.0 mg/l SO₃²⁻ 0.8 - 48.0 mg/l SO₂, 150 Tests
Item number: MC1017460001
Brand: Merck
$244.80
Product Image of pH Cell Test Method: photometric pH 6.4 - 8.8 Spectroquant®, 280 Tests
pH Cell Test Method: photometric pH 6.4 - 8.8 Spectroquant®, 280 Tests
Item number: MC1017440001
Brand: Merck
$136.80
Product Image of Monochloramine Test Spectroquant®, 0.050-10.00 mg/l Cl₂ 0.036-7.25 mg/l NH₂Cl 0.010-1.96 mg/l NH₂Cl-N, 150 Tests
Monochloramine Test Spectroquant®, 0.050-10.00 mg/l Cl₂ 0.036-7.25 mg/l NH₂Cl 0.010-1.96 mg/l NH₂Cl-N, 150 Tests
Item number: MC1016320001
Brand: Merck
$501.60
Product Image of Total Hardness Cell Test Spectroquant®, 5 - 215 mg/l Ca, 7 - 301 mg/l CaO 12 - 537,mg/l CaCO₃ 25 Tests
Total Hardness Cell Test Spectroquant®, 5 - 215 mg/l Ca, 7 - 301 mg/l CaO 12 - 537,mg/l CaCO₃ 25 Tests
Item number: MC1009610001
Brand: Merck
$193.81
Product Image of Molybdenum Cell Test Spectroquant®, 0.02 - 1.00 mg/l Mo 0.03 - 1.67 mg/l MoO₄²⁻ 0.04 - 2.15 mg/l Na₂MoO₄ 25 Tests
Molybdenum Cell Test Spectroquant®, 0.02 - 1.00 mg/l Mo 0.03 - 1.67 mg/l MoO₄²⁻ 0.04 - 2.15 mg/l Na₂MoO₄ 25 Tests
Item number: MC1008600001
Brand: Merck
$231.73
Product Image of Calcium Cell Test Spectroquant®, 10 - 250 mg/l Ca 14 - 350 mg/l CaO 25 - 624 mg/l CaCO₃ 25 Tests
Calcium Cell Test Spectroquant®, 10 - 250 mg/l Ca 14 - 350 mg/l CaO 25 - 624 mg/l CaCO₃ 25 Tests
Item number: MC1008580001
Brand: Merck
$231.73

Photometry

In laboratories in general photometry describes the method of determining the concentration of colored solutions with the aid of light. Here, white light is projected through a prism onto a screen. Depending on which wavelength is used, the color of the test object or of the test solution changes:

  • 390 - 435 nm: purple / violet
  • 435 - 495 nm: blue
  • 495 - 570 nm: green
  • 570 - 590 nm: (greenish) yellow
  • 590 - 630 nm: orange
  • 630 - 770 nm: red

As a light source either infrared or ultraviolet light can be used. Infrared radiation, also called radiant heat is radiated  by a body even more the warmer it is. Therefore infrared radiation occurs primarily in medically treating premature infants in incubators, but the energy efficiency of homes can also be determined. UV radiation, however, has the ability to kill bacteria. They are used in the sterilization in the operating room, as well as to kill germs in food. Furthermore the UV light is used for curing composite fillings in dental practices - the majority, however, know the UV light in conjunction with solariums and sun beds. UV light in sun beds is used to build up vital vitamin D.

The principle of the photometry is based on the attenuation of the light as it passes through matter. The weakening of the light is the result of an interaction between light of a specific wavelength and of the test substance that needs to be present as a solution. The amount of light attenuation is a measure of the concentration, under specified conditions.

Standard solutions for photometry

The lab user can choose from two different options when using cuvette tests. One of these are standard solutions which are used as a stock solution for dilution of solutions, e.g. in water analysis.

These freshly prepared control standards from stock solutions must be used in a few parameters (e.g. nitrite) since they are subject to rapid change. When using these standard solutions, the correct amount of dilution must be calculated and carried out by hand. A series of standard solutions which must be freshly prepared on a regular basis:

  • nitrite
  • free chlorine
  • formaldehyde
  • hydrazine
  • silicon
  • sulfite
  • hydrogen peroxide
  • anionic surfactants

and some more. Apart from the additional "effort" having to create the solutions again and again, these control standards are generally cheaper than the ready-to-use multi-parameter standards.

Multi-parameter standards for photometry

The second option is therefore the use of solutions that have already been created, the ready-to-use so-called multi-parameter standards. They convince with a simple handling since they already have the right concentration to the test set. Compared to the already named standard solutions there is no need for dilution with calculations for concentration and pipetting volume - thus accidental volume and pipetting errors can be avoided. Furthermore those standards score with pre-increase solutions for the study of matrix effects or interfering ions.