Hach powder pillows overview

Hach have a wide variety of powdered reagents available for colorimetric assays. 

 Test Hach product 
 Cat #
 Method Range Sample size mg of reagents in packet  mg per 3 mL
reaction volume
 LED Notes
 Total iron FerroVer
 92799
 1,10-phenanthroline. 0 to 10 ppm 5 mL Avg = 119 mg
[118, 127, 112 mg]
 72 mg Blue: 470nm
 Optimal: 510nm
 $0.18 per test
 Ferrous Iron 103769  Hach method 8146.
1,10-phenanthroline.
 0 to 3 ppm 25 mL 0.100 g 12 mg  $0.28 per 25 mL test.
 Sulfate SulfaVer 4
 2106769 
 Hach Method 8051.
 Turbidimetric.
 2 to 70 ppm 10 mL 0.100 g  30 mg  $0.28 per 10 mL test
 Nitrate NitraVer 5 
 2106169
 Hach method 8039.  Cadmium reduction. 0 to 30 ppm 10 mL Avg = 76 mg 
 [79, 84, 77, 68, 70, 67, 76, 77, 64, 78, 84, 86 mg]

 22.8 mg

Use 25 mg
 Custom: 430nm
 Optimal: 420nm
 $0.38 per test. 
 This procedure requires a 1-min vigorous shaking step to get good results.
 Once amber color is developed it is stable at least over-night.

 *Generates hazardous waste*
 Phosphate Phosver 3
 2106069
 Hach method 8048.
 Ascorbic acid.
 0 to 2.5 ppm 10 mL Avg = 311.5
351, 321, 274, 300 mg
 93 mg

Use 90 mg
 Red: 632 nm
Optimal: 880 nm
 $0.30 per 10 mL test. 
 Reagent does not dissolve very well. Needs alot of shaking. Stirring  should help. Range should be up to 2.5 ppm. Need to try the 10 mL size.
Readings are not stable as the reaction begins to precipitate. Read 2-5 mins after the mixing step.


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