2 results about "Spectrofluorometer" patented technology

The present application belongs to the technical field of aluminum salt determination of injection products in the pharmaceutical industry, and particularly relates to a method for determining aluminum salt in peritoneal dialysis fluid by using a fluorescence spectrophotometer. 3+ The complex formed in ethyl acetate has good stability and strong fluorescence intensity, and the sample is treated with concentrated hydrochloric acid and extracted with 1,1-dimethylpropanone (MIPK for short), so that the interference of transition metal impurity ions is eliminated. At the same time, the special determination parameters are specified, and the method after the research is verified well, and meets the aluminum salt inspection of peritoneal dialysis fluid products.

The application discloses a kind of in-situ measurement methods of aquatic primary productivity based on fluorescence excitation spectrum three-wavelength fitting model, belong to environmental monitoring and aquatic ecosystem technical field.The application includes: in-situ collection target water body water sample and filter to remove large particle impurities;Water sample is moved into fluorescence spectrophotometer sample cell, and after dark chamber balancing, the fluorescence intensity of 438nm, 485nm, 624nm three characteristic wavelengths is measured;According to water sample type, the integral area of fluorescence excitation spectrum is calculated using corresponding first-order linear fitting equation;Through the correlation model of integral area and primary productivity, the primary productivity of target water body is calculated.The application does not need sample pretreatment, simple and fast, measurement period is ≤30min, realizes in-situ non-invasive monitoring;Cover a variety of photosynthetic pigment characteristic absorption peak, wide application range, can tolerate a variety of stress conditions;Measurement precision is high, sensitivity is strong.