Test principle

In an alkaline environment, free Mg reacts with Calmagite, forming purplish-red complex which shows absorption at the wavelength of 530 nm. The intensity of the color is proportional to the concentration of Mg.

EGTA  and TEA are used to eliminate interferences caused by calcium (Ca) and heavy metal, respectively. Protein molecules are stabilized by surfactants, and thus the measurement of Mg can be free from the interference of proteins.

Product Features

1.    Linear range of Mg level: [0.04, 2.00] mmol/L

Linear correlation coefficient ∣r∣≥0.990

Linear deviation ≤ ± 10.00%

2.    Absorbance of blank ≤ 1.50  

3.    Sensitivity

The change in absorbance (ΔA) ≥ 0.10 while testing the specific Mg sample of concentration of 1.05 mmol/L.

4.    Accuracy

Relative deviation is within ±10%.

5.    Precision

Intra CV% ≤ 5.0%; inter CV% ≤ 5.0%.

Technical Parameters

Reference range of Ca level: 0.54 – 1.04 mmol/L.

Packing Specifications

R1: 1×50 ml, R2: 1×5 ml

R1: 1×100 ml, R2: 1×10 ml

R1: 2×50 ml, R2: 2×5 ml

R1: 2×100 ml, R2: 2×10 ml

R1: 4×50 ml, R2: 4×5 ml

R1: 3×100 ml, R2: 3×10 ml

Storage and stability

Unopened: Store test kits at 10 - 30℃ protected from light. Stable to expiration date printed on individual vials (for 15 months).

Opened: Store test kits at 10 - 30℃ protected from light. Stable for 1 month if kept capped from original container and free from contamination.

Do not freeze the test kit.