Artificial and natural fiber fabrics with immobilized di- and triaminotriarylmethane reagents in chemical test methods

The potentials of fabrics made of artificial and natural fibers as supports for the di- and triaminotriarylmethane reagents were shown for their possible use in chemical test methods. Malachite Green, Brilliant Green, Methyl Violet, Crystal Violet, and Parafuchsine were immobilized on viscose, calico, coarse calico, and a mixed fabric. The reagent retention was 70-90%. The indicator fabrics are resistant to strong acids and alkalies and can be used for the test determination of 0.01-10 mg/L of phosphates, 1-80 mg/L of silicates, 0.01-8 mg/L of dissolved oxygen, biological oxygen demand for 5 days (BOD5), 0.5-10 mg/L of formaldehyde, and 0.1-10 mg/L of anionic surfactants. The analysis time was 10-15 min. The relative standard deviation did not exceed 30%.