The General Vitamin B12 (VB12) ELISA Kit is a highly sensitive and specific assay designed for the accurate detection of vitamin B12 levels in various biological samples including serum, plasma, and cell culture supernatants. This kit provides researchers with reliable and reproducible results, making it an essential tool for studying vitamin B12 deficiency and its implications on human health.Vitamin B12 is a crucial nutrient that plays a vital role in DNA synthesis, red blood cell formation, and nerve function. Deficiency in vitamin B12 can lead to a range of health issues including anemia, neurological disorders, and cardiovascular diseases.
Therefore, accurate measurement of vitamin B12 levels is essential for diagnosing deficiency and monitoring treatment efficacy.Whether you are studying the impact of dietary habits, age-related changes, or underlying medical conditions on vitamin B12 status, the General Vitamin B12 ELISA Kit offers a convenient and reliable solution for quantifying vitamin B12 levels in biological samples. With its high sensitivity and specificity, this kit is an invaluable tool for research in the fields of nutrition, metabolism, and clinical diagnostics.
Matrices listed below were spiked with certain level of recombinant the index and the recovery rates were calculated by comparing the measured value to the expected amount of the index in samples.
Matrix
Recovery range (%)
Average(%)
Serum (n=5)
83-100
91
EDTA plasma (n=5)
90-103
96
Heparin plasma (n=5)
89-102
95
Linearity:
The linearity of the kit was assayed by testing samples spiked with appropriate concentration of the index and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Sample
1:2
1:4
1:8
1:16
Serum (n=5)
82-96%
83-98%
81-99%
93-101%
EDTA plasma (n=5)
88-101%
86-95%
90-102%
80-93%
Heparin plasma (n=5)
80-91%
82-90%
95-104%
79-95%
Intra-assay Precision:
Intra-Assay: CV <10%. 3 samples with low, middle and high level the index were tested 20 times on one plate, respectively.
Inter-assay Precision:
Inter-Assay: CV <12%. 3 samples with low, middle and high level the index were tested on 3 different plates, 8 replicates in each plate.
Stability:
The stability of ELISA kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition. Note:To minimize unnecessary influences on the performance, operation procedures and lab conditions, especially room temperature, air humidity, and incubator temperatures should be strictly regulated. It is also strongly suggested that the whole assay is performed by the same experimenter from the beginning to the end.
Step
Protocol
1.
Prepare all reagents, samples and standards
2.
Add 50µL standard or sample to each well. And then add 50µL prepared Detection Reagent A immediately. Shake and mix. Incubate 1 hour at 37°C
3.
Aspirate and wash 3 times
4.
Add 100µL prepared Detection Reagent B. Incubate 1 hour at 37°C
5.
Aspirate and wash 5 times
6.
Add 90µL Substrate Solution. Incubate 15-25 minutes at 37°C
7.
Add 50µL Stop Solution. Read at 450 nm immediately.
Prof. Dr. Svetla Vasileva Staykova et al.
MONITORING AND ASSESSMENT OF NUTRITIONAL STATUS AND MARKERS OF THE INFLAMMATORY PROCESS IN PATIENTS WITH CHRONIC KIDNEY DISEASE
