Chromium/Chromate

Image

Product Name

Type

Gradation of scale
or limit of sensitivity

Item #

Order

Product:�Chromium Test paper

Type:�Yes/No test paper

Gradation / Sensitivity:�2 mg/L Cr³⁺ or 5 mg/L CrO₄^2-

Item #:�90724

	box of 200 strips	$40.40

This test paper allows the quick and easy detection of Chromate (CrO₄^3-). Cr(III) ions must be converted to chromate prior to the detection. For non-destructive testing of materials apply a drop of acid solution (1 part hydrochloric acid 37 % + 4 parts hydrogen peroxide 3 %) to the degreased surface. After 10-30 seconds add a drop sodiumhydroxyde (NaOH). Press the test paper onto the precipitate then put it into diluted sulfuric acid. In the presence of chromium, a violet spot appears. With this procedure Chromium contents >0.1% are safely detected. See QUANTOFIX� Chromate 91301 for semi-quantitative determination. Box of 200 strips. Instruction Sheet (pdf)

Color reaction: white → violet

Product:�QUANTOFIX� Chromate

Type:�Semi-quantitative test strips

Gradation / Sensitivity:�0 � 2 � 10 � 30 � 100 mg/L CrO₄^2-

Item #:�91301

	box of 100 strips & reagent	$53.50

This test allows the quick and easy determination of Chromate in solutions. It comes with all necessary reagents so that the measurement can immediately be started. Within 30 seconds one gets a reliable result. Many Chromate compounds are poisonous and carcinogenic. They are used for example in chrome plating and tanning. QUANTOFIX� Chromate is used for the easy monitoring of water discharged from such plants. Interferences caused by molybdates are eliminated by addition of oxalic acid in crystalline form to the strongly acidic solution. Iron(III) ions are precipitated with sodium hydroxide solution 32 %. Box of 100 strips and reagent. Instruction Sheet (pdf)

Color Reaction: white→ violet

Product:�VISOCOLOR� ECO Chromium

Type:�Colorimetric test kit

Gradation / Sensitivity:�0 � 0.02 � 0.05 � 0.10 � 0.15 � 0.20 � 0.30 � 0.40 � 0.50 mg/L Cr(VI)

Item #:�931020

	1 kit (~140 tests)	$78.00

In sulphuric acid chromate ions react with diphenylcarbazide to form a red-violet dye. (Reaction basis according to DIN EN ISO 7393 G4-2). 1 kit (~140 tests). Instruction Sheet (pdf)

Product:�NANOCOLOR� total Chromium 2

Type:�Photometric Tube test

Gradation / Sensitivity:�0.05 - 2.00 mg/L Cr
0.005 - 0.500 mg/L Cr

Item #:�985059

	1 pack (20 test tubes)	$127.00

Tube test for the photometric determination of total-Chromium. 1 pack (20 test tubes). Instruction Sheet (pdf)

Product:�NANOCOLOR� Chromate 5

Type:�Photometric Tube test

Gradation / Sensitivity:�0.05 - 2.00 mg/L Cr(VI)
0.1 - 4.0 mg/L CrO₄^2-

Item #:�985024

	1 pack (20 test tubes)	$85.30

Tube test for the photometric determination of Chromium/Chromate. 1 pack (20 test tubes). Instruction Sheet (pdf)

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