UV-Vis Spectrophotometric Amylase Activity Assay
Quantifies alpha-amylase by starch hydrolysis to reducing sugars (maltose) detected via DNS colorimetry at 540 nm. The reducing sugars donate electrons to the DNS. The DNS (3,5-dinitrosalicylic acid) is reduced into a new molecule called 3-amino-5-nitrosalicylic acid. As this chemical reduction happens, the liquid changes color from its original pale yellow to a deep orange-red or dark brown.
Sample Requirement:
Serum, plasma, saliva, or tissue homogenate sample (1 mL).
Sample Count:
Accepts exactly 1 sample.
Moisture Measurement of Soap Bar by Karl Fischer Titration
Determination of water content in soap bars using volumetric Karl Fischer titration. The sample is dissolved in anhydrous methanol and titrated with a Karl Fischer reagent to an electrometric endpoint.
Sample Requirement:
Type: Soap bar (solid)
Amount: 1 g
Detection of Escherichia coli
This method is applicable to all non-sterile cosmetic products. It is designed to detect viable Escherichia coli by ensuring that any antimicrobial properties of the cosmetic matrix (such as preservatives or whitening actives) are effectively neutralized.
Sample Requirement:
10 grams
Sample Count:
Accepts exactly 1 sample.
Organoleptic Evaluation of Deodorizing Efficacy (Acidic Model)
The method evaluates the efficacy of the test sample in suppressing the vaporization of Short-Chain Fatty Acids (SCFAs), specifically Isovaleric Acid, which acts as a chemical marker for human axillary (armpit) and foot malodor. f the sample contains alcohols (ethanol) or enzymes from fermentation, the isovaleric acid may chemically react during the 37°C incubation to form an ester (e.g., Ethyl Isovalerate), which typically has a pleasant, fruity aroma rather than a malodor.
Sample Requirement:
5 g
Sample Count:
Accepts exactly 1 sample.
Antimicrobial Preservative Effectiveness Challenge Test against Escherichia coli
Microbial Challenge Test for testing the effectiveness of preservatives used in formulas. To ensure that it is effective enough to control infection using ISO 11930.
Sample Requirement:
100 g
Sample Count:
Accepts exactly 1 sample.
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