Does temperature affect QAC test strip results?
Higher temps: Testing was run on set of control solutions 0 – 50 – 100 – 200 – 400 ppm Hyamine 1622 (Fluka) warmed up to temperatures in the range 35 – 60oC. T (oC) QAC strips [...]
What determines if I can taste PTC or Sodium Benzoate?
The taste test strips exhibit a taste due to a dominant allele on chromosome number seven, and the ability to taste these compounds is present in about 70% of the U.S. population. The ability to [...]
Is PTC test paper safe to put in my mouth?
YES. In the case of the genetics taste test strips, both PTC and Sodium Benzoate are salts of benzoic acid. Any possible toxicity would be in grams per kilogram of body weight, which is millions [...]
How can I detect bacteria using Protein test strips?
Procedure: 1. Nutrient broth medium inoculated with Escherichia coli and Staphylococcus aureus and incubated at 37C for 24 hours, "starting cultures". 2. A standard plate count procedure performed using 24 hour cultures of Escherichia coli [...]
How does the Urine Analysis test strip work?
Glucose Apart from glucose, no other compound in urine is known to give a positive reaction. False positive reactions can be produced by a residual of oxidative compounds, from cleansing agents, for example. Larger amounts [...]
What do Glucose test strips detect?
These test strips are selective for glucose. You will not get a reaction with soft drinks or regular sugar, as they primarily contain fructose or sucrose. In solutions containing oxidizers (for example, iodine solutions in diffusion/osmosis experiments), [...]
Why is my Ascorbic Acid Test Strip turning pink or purple?
The Ascorbic Acid test strip is based on discoloration of blue red-ox indicator, depending on the concentration of ascorbic acid. The Ascorbic Acid test strip is calibrated from 0.01% (10 mg/100 ml) to 0.1% (100 [...]
What are the conversions for Water Hardness?
Hardness is mostly expressed in ppm (mg/l as CaCO3) or in German degrees (°d). There are also other units used for the expression of hardness, and the conversions are presented below. Water Hardness Conversion Table [...]
How do I adjust the pH of a solution before testing for Fluoride?
The reaction of the Fluoride test strip is very dependent upon the acidity level of the solution to be tested. Before testing, the solution has to be acidified to a pH ≤ 0.5. For acidification, [...]
How do I use the Fluoride Test Strip?
The solution to be tested must be at a pH of 0.5 in order for this test to be accurate. This pH measure can be accomplished using concentrated Hydrochloric acid (muriatic acid) to acidify the [...]