Free Sulfite Test Strips, <span class="bldppm">10-500 ppm</span> [Vial of 50 Plastic Strips]

Free Sulfite Test Strips, <span class="bldppm">10-500 ppm</span> [Vial of 50 Plastic Strips] - Image 2

Free Sulfite Test Strips, <span class="bldppm">10-500 ppm</span> [Vial of 50 Plastic Strips] - Image 3

Free Sulfite Test Strips, 10-500 ppm [Vial of 50 Plastic Strips]

$28.22

Easy to read color blocks at 10, 50, 100, 250, and 500ppm.
Rapid test only taking 15 seconds to test a solution
No need for field kit or reagents to conduct tests
Desiccant vial with flip-top lid preserves freshness of strips
Recommended for lemon juice, potatoes, shellfish or dried fruit. Not recommended for red wine.*

Bulk Product Offers

Min Buy	Max Buy	Offer
2+	9 +	5 % Discount
10+	24 +	9 % Discount
25+	-	13 % Discount

SKU: PWQ10V50 Category: Food Service Test Strips
UPC: 649910801095

Description

*To learn more about this test and how to use it for red wine or to test total sulfites, please click here! Even though this strip can test red wines, we would recommend the Accuvin Free SO2 test for red wine testing as it requires no sample prep and is therefore much simpler to use.

The Free Sulfite Test Strip is used to detect sulfite ions in water-based solutions, measuring in increments of 10, 50, 100, 250, and 500 ppm. Various types of sulfites can be tested with this strip: sulfite, bisulfite, and metabisulfite. When testing foods for sulfite content, such as wine, it is important to realize that the sulfite present can be either free or “bound.” The strip detects free sulfite only, the pH needs to be adjusted to 12 to get an accurate reading for total sulfites (free plus combined). Please contact us before buying if you intend to use it for testing red wine or something for total sulfites so we can provide you more information.

Instructions: Immerse the test strip into the solution and swirl 3 times. Remove strip and compare to color chart after 15 seconds.

Additional information

Weight	1.5 oz
Dimensions	4 × 2.75 × 2.75 in

Frequently Asked Questions (FAQ)

Can this product be used to test for sulfites in foods?

The strip detects free sulfite only initially, the pH needs to be adjusted to 12 to get an accurate reading for total sulfites.

This test was designed for testing water based aqueous samples and not designed or calibrated for testing solid foods. You will need to validate a methodology for testing yourself. We can not validate this product for food based applications.

When testing a solid food item you will first likely need to mix with water and blend it. You then may be able to test it or you may need to add an emulsifier in order to break down the food you are testing and blend that in as well. When mixing the actual item you are testing with other components it is important to standardize the ratios so that your results are consistent.

Two other things to consider are:

Sometimes not all of the sulfites in a solid will enter the solution.
When you add water prior to blending you are effectively diluting the food. As a result, any reading you would get needs to be adjusted for this.

It is important to standardize and validate your findings and methods for testing.

Can this test be used to test cider?

Yes. This test can be used to measure sulfite levels in cider, helping cider makers monitor quality, prevent oxidation and browning, and manage microbial stability throughout fermentation and bottling.

Sulfites, typically added in the form of potassium or sodium metabisulfite, play an important role in preserving freshness, protecting flavor, and extending shelf life. The appropriate sulfite level depends largely on the cider’s pH. At lower pH levels, less sulfite is needed to provide microbial protection, while higher pH levels generally require more.

As a general guideline, home cider makers commonly target the following sulfite additions:

pH 3.0–3.3: Approximately 50 ppm

pH 3.3–3.5: Approximately 100 ppm

pH 3.5–3.8: Approximately 150 ppm

Regular sulfite testing helps cider makers make informed adjustments and maintain consistent beverage quality from fermentation through bottling.