Total iron (divalent iron) iron testing

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Overview

Total iron (divalent iron) iron detection: Iron in nature exists in the form of its oxide, or in the form of silicon or sulfur compounds. The dissolved iron in surface water hardly exceeds 1mg/L, but the content of dissolved iron in groundwater is higher. The iron content in national second-class drinking water is 0.3mg/L. If it exceeds 0.3mg/L, the water will produce a strange odor and color. If the concentration of iron in surface water is high, it indicates industrial pollution or loss.

Product Details

Total iron (divalent iron) iron testingColorimetric testing kit

scope	MDL	method	Catalog Number	Supplement product number
0-1 and 1-10 ppm	0.05 ppm	Analysis method of ortho phenanthroline	K-6210	R-6201
0-1 and 1-10 ppm	0.05 ppm	Analysis method of ortho phenanthroline	K-6010	R-6001
0-30 and 30-300 ppm	5 ppm	Analysis method of ortho phenanthroline	K-6210D	R-6201D
0-30 and 30-300 ppm	5 ppm	Analysis method of ortho phenanthroline	K-6010D	R-6001D
0-60 and 60-600 ppm	10 ppm	Analysis method of ortho phenanthroline	K-6010A	R-6001A
0-120 and 120-1200 ppm	20 ppm	Analysis method of ortho phenanthroline	K-6010B	R-6001B
0-1200 and 1200-12000 ppm	200 ppm	Analysis method of ortho phenanthroline	K-6010C	R-6001C
0-100 and 100-1000 mg/L	5 milligrams per liter	Iron thiocyanate method	K-6002	R-6002

Colorimetric testing kit

scope	method	Catalog Number
0 to 2.50 ppm	PDTS method	K-6023
0-6.00 ppm	Analysis method of ortho phenanthroline	K-6203
0-6.00 ppm	Analysis method of ortho phenanthroline	K-6003

Total iron (divalent iron) iron testingmethod

Iron in nature exists in the form of its oxide or in combination with silicon or sulfur. The dissolved iron in surface water hardly exceeds 1mg/L, but the content of dissolved iron in groundwater is higher. The iron content in national second-class drinking water is 0.3mg/L. If it exceeds 0.3mg/L, the water will produce a strange odor and color. If the concentration of iron in surface water is high, it indicates industrial pollution or loss.

Iron pollution in saltwater in oil fields is caused by corrosion of iron containing parts and equipment. The accumulation of insoluble iron salts in saltwater can cause damage to the composition of objects and seriously affect the production capacity of oil wells. So it is very important to quantify the total iron content in saline water.

Analysis method of ortho phenanthroline (total iron&dissolved iron; total iron&divalent iron)

Reference: APHA Standard Method, 22nd edition, Method 3500-Fe B-1997; ASTM D 1068-77， Iron in Water, Test Method A, J.A. Tetlow and A.L. Wilson, "Determination of Iron Absorption in Boiler Water," Volume 89, Page 442 (1964)
In the CHEMetrics measurement method, divalent iron ions react with 1,10-ortho phenanthrene to produce an orange chelate. When measuring total iron, add mercaptoacetic acid solution to the sample to reduce trivalent iron to divalent iron. The reagent formula can counteract the interference from oxidants, and the measurement result is expressed in ppm (mg/L) Fe. The results are expressed as ppm (mg/L) iron.

PDTS analysis method (total iron)

Reference: G. Frederick Smith Chemical Company, Ferroreagent, 3rd edition, page 47 (1980). J. A. Tetlow and A.L. Wilson, "Determination of Iron Absorption in Boiler Water," Analysts, Volume 89, Page 442 (1964)
In CHEMetrics' colorimetric analysis of total iron content, mercaptoacetic acid is used to dissolve particulate iron and reduce trivalent iron to divalent iron. Then, divalent iron ions react with PDTS (3- (2-pyridyl) -5,6-di (4-dibenzenesulfonic acid) -1,2,4-triazine disodium salt in acidic solution to form a purple chelate. The measurement results are expressed in ppm (mg/L) Fe.

Analysis method of iron thiocyanate (iron content in saltwater)

Reference: D.F. Boltz and J.A. Howell, Colorimetric Determination of Non Metals, 2nd Edition, Volume 8, Page 304 (1978). Carpenter, J.F. "A New Method for Determining Iron Content in Saltwater of Completed Oilfield" SPE International Symposium (2004)

The testing method for iron in saltwater adopts the iron thiocyanate chemical method. In an acidic solution, hydrogen peroxide oxidizes divalent iron ions, and the resulting trivalent iron ions react with ammonium thiocyanate to form a red orange thiocyanate complex proportional to the iron ion content. The measurement result is expressed in mg/L to indicate the total iron content. Dividing the measurement result in mg/L by the density of saline solution can obtain the mg/kg value.