Simplified Suspended Solids Test for Sodium Hypochlorite Solutions

Scope

This procedure describes how to use a filter system as an aid to easily determine the clarity of sodium hypochlorite solutions. The bleach filter equipment is inexpensive and is designed for use at the customer's site. For laboratory-quality equipment and procedures to achieve accurate and repeatable results, please refer to the "Suspended Solids Quality Test for Bleach Using Vacuum Filtration."

Apparatus (see Figure 1 below)

1. Nalgene™ 180 PVC Vacuum Tubing

2. Barnant Portable Air/Vacuum Pressure Stations

3. Nalgene™ Brand Polypropylene Flask with Angled Tabulation

4. Nalgene™ Vacuum Filter Holder

5. Millipore™ Filters, AA type, 0.8 uM pore size

6. 1000 ml graduated cylinders or beakers

Simplified Suspended Solids Test for Sodium Hypochlorite Solutions

Field Bleach Vacuum Test Kit 935-05586-001

Item Part Number	Description
1135-05581-0011	Nalgene™ 180 PVC Vacuum Tubing
2135-05582-0011	Barnant Portable Air/Vacuum Pressure Stations
3135-05583-0011	Nalgene™ Brand Polypropylene Flask with Angled Tabulation
4135-05584-0011	Nalgene™ Vacuum Filter Holder
5391-02635-0011	Millipore™Filters, AA type, 0.8 uM pore size
6135-05580-0011	Pelican Case

To Order a Field Bleach Vacuum Test Kit, contact a Powell Sales Representative.

Procedure

Procedure Note: All apparatus should be kept clean and dust free

1. Assemble filter. Use forceps to place one filter on plastic support base. Put filter funnel and clamp in place.

2. Shake sample bottle. Fill graduated cylinder or beaker to the 1000 ml mark with solution.

3. Start Vacuum.

4. Slowly pour the 1000 ml into the top of the vacuum holder. When sample has filtered through completely, record the time to filter.

Note: Bleach that has not been filtered with submicron filtration will take approximately 6 to 8 times longer than filtered product. Typically 1000 ml of high clarity bleach will take less than three minutes at 20" Hg vacuum.After filtration, the filter paper should be near white with virtually no retained particles. discolored filter paper typically indicates the presences of iron.

Five Samples of Bleach Were Tested

Sample Number	Bleach Strength	Filter Time
1	Household Bleach 6%	0 min. 55.88 seconds
2	Household Bleach 5.25%	1 min 14.15 seconds
3	Household Bleach 5.25%	2 min 44.07 seconds
4	Household Bleach	7 min. 48.00 seconds
5	Pool Bleach 12.5%	The test was stopped after 60 minutes of filtering. At 60 minutes, approximately 1/2 liter had passed through the filter.

More Information

Product Literature (PDF)

High Purity Sodium Hypochlorite -- Improved Quality for Greater Profits

7 Reasons to Consider Producing High Purity Sodium Hypochlorite with the Powell Bleach Filter

Owner List

Effectiveness of Filtering Liquid Bleach

Financing Options

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