T-SOD Assay Kit Hydroxylamine method - E-BC-K019-M

T-SOD Assay Kit Hydroxylamine method - E-BC-K019-M

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Detection principle

The superoxide anion free radical (O2-) can be produced by xanthine and xanthine oxidase reaction system, O2- oxidize hydroxylamine to form nitrite, it turn to purple under the reaction of developer. When the measured samples containing SOD, the SOD can specifically inhibit superoxide anion free radical (O2-). The inhibitory effect of SOD can reduce the formation of nitrite, the absorbance value of sample tube is lower than control tube. Calculate the SOD of sample according to the computational formula.


Performance characteristics

Synonyms T-SOD
Sample type Serum,plasma,urine,cells,cell culture supernatant,tissue
Sensitivity 2.4 U/mL
Detection range 2.4-61 U/mL
Detection method Colorimetric method
Assay type Enzyme Activity
Assay time 70 min
Precision Average inter-assay CV: 5.600%Average intra-assay CV: 5.500%
Other instruments required Micropipettor, Centrifuge, Incubator
Other reagents required PBS (0.01 M, pH 7.4), Normal saline (0.9% NaCl)
Storage Reagent 4: -20℃, others: 2-8℃
Valid period 12 months


The activity of SOD was significantly reduced in advanced atherosclerosis (aAT) group. (p<0.0001)

M K Tembhre et al investigates the function of interleukin-33 in advanced atherosclerosis. Total superoxide dismutase (T-SOD) activity of human PBMCs was determined using T-SOD activity assay kit (E-BC-K019-M).

Dilution of sample

The optimal sampling volume are different for different species, the SOD also are different for different samples. It is recommended to take 2~3 samples to do a pre-experiment, diluting a series of diluent and determine the dilution factor when the SOD inhibition ratio is 10%~50% (the optimal inhibition ratio is the range of 25%~45%.) before formal experiment.

The recommended dilution factor for different samples is as follows (for reference only):

Sample type

Dilution factor

Human serum


Rat serum


Mouse serum


HepG2 cell


Human urine


10% Mouse liver tissue homogenate


10% Epipremnum aureumtissue homogenate


10% Mouse brain tissue homogenate


Note: The diluent is normal saline (0.9% NaCl) or PBS (0.01 M, pH 7.4).


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