Total Sulfite Assay Kit (Enzymatic) (K-ETSULPH)

Why are results for sulfite standards ~ 20% lower than expected when using the Total Sulfite Assay Kit (Enzymatic) (K-ETSULPH)?
Due to the characteristic instability of aqueous sulphite samples, recoveries of less than 100% should be expected.  This is consistent with values obtaine...
Wed, 20 Apr, 2016 at 12:44 PM
Is an absorbance change observed of 0.1–0.2 for the blank sample normal when using the Total Sulfite Assay Kit (Enzymatic) (K-ETSULPH)?
The absorbance change (0.1–0.2) over the 30 min period equates to ~ 0.004/min and is normal.  This is partly due to the gradual oxidation of NADH. ...
Wed, 20 Apr, 2016 at 12:45 PM
When using the Total Sulfite Assay Kit (Enzymatic) (K-ETSULPH) for quantitative analysis what level of accuracy and repeatability can be expected?
The test kit is extremely accurate – at Megazyme the quality control criteria for accuracy and repeatability is to be within 10% of the expected value usin...
Wed, 20 Apr, 2016 at 12:46 PM
What is the range of the Total Sulfite Assay Kit (Enzymatic) (K-ETSULPH)?
The assay is linear over the range of 1 to 50 μg of sulphite per assay.  The standard of 0.3g/L (when prepared as per kit booklet) is equivalent to 30 μg o...
Wed, 20 Apr, 2016 at 12:46 PM
What is the detection limit of the Total Sulfite Assay Kit (Enzymatic) (K-ETSULPH)?
The detection limit is 0.34 mg/L, which is derived from an absorbance difference of 0.020 with a sample volume of 2.0 mL. Product Page (K-ETSULPH)...
Wed, 20 Apr, 2016 at 12:47 PM
What is the calculation of the conversion factor used for preparation of sulphite (sulfite) standards in the sulphite kits (K-SULPH, K-TSULPH, K-ETSULPH, K-FSULPH)?
The standard supplied with the sulphite kits is sodium sulphite (126.043 g/mol) and the results of the kit assays are given as mg/L of sulphur dioxide (64.0...
Thu, 10 May, 2018 at 3:25 PM