5 results about "Routine analysis" patented technology

The invention discloses an HPLC (high performance liquid chromatography) detection method of diltiazem hydrochloride and an isomer thereof, effective separation of diltiazem hydrochloride and the diltiazem hydrochloride isomer can be realized, accurate nature determination can be realized, the method is simple and easy to implement, an instrument is a common high performance liquid chromatograph, the detection cost is low, and the method is suitable for industrial production. The method is good in specificity, linearity, precision, stability and other tests, can be used for conventional analysis and quality control of diltiazem hydrochloride and diltiazem hydrochloride isomers, and meets the requirements of research, development and production.

This invention discloses a sensitive fluorescence sensor for detecting NO in ham sausage samples. 2‑ The method belongs to the field of analytical detection. The steps are as follows: 1. Prepare carbon dots using citric acid and cauline as precursors; 2. NO in the carbon dots 2‑ The addition of [a specific substance] will quench fluorescence through dynamic quenching and diazotization effects, based on which NO [a specific substance] can be constructed. 2‑ Standard curves of NO concentration and fluorescence quenching degree were obtained, and the NO concentration in ham sausage samples was determined. 2‑ The concentration of NO. This invention is the first to use a sensitive fluorescence sensor to sequentially detect the concentration of NO. 2‑ It enables quantitative detection of substances and is simple, safe, and efficient, making it suitable for routine analysis.

The invention discloses a fast protein electrophoresis buffer solution dry powder and preparation and application thereof, the buffer solution dry powder takes prepared 1L of a 1 * buffer solution as a reference standard and comprises the following components by mass: 3-6g of tris (hydroxymethyl) aminomethane, 15-25g of glycine, 4-8g of N-(2-hydroxyethyl) piperazine-N '-3-propanesulfonic acid and 0.5-1g of lithium dodecyl sulfate, and the water content of the dry powder is less than or equal to 3% (w / w). According to the buffer solution dry powder disclosed by the invention, by optimizing core components and proportions of a buffer system, the protein electrophoresis buffer solution dry powder which is rapid in electrophoretic separation, high in resolution, low in toxicity, stable and simple and convenient to prepare is realized, and the protein electrophoresis buffer solution dry powder is suitable for mainstream protein electrophoresis scenes such as SDS-PAGE (Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis) and is particularly suitable for high-throughput detection, clinical rapid diagnosis and laboratory conventional analysis.

The invention relates to the technical field of blood analysis, in particular to an animal blood routine analyzer which comprises an analyzer body, a sampling part is arranged on the analyzer body, a fixed bottom plate is fixedly connected to the inner wall of the sampling part, and a rotary shaking mechanism, an up-down shaking mechanism and an adsorption stabilizing mechanism are arranged at the top end of the fixed bottom plate; the rotary shaking mechanism comprises a sliding block plate, a shaking plate and a placing column, a placing groove is formed in the top end of the placing column, the bottom end of the placing groove is semicircular, a circular placing hole is formed in the sliding block plate in a penetrating mode, and the circular placing hole and the placing groove are used for placing a glass test tube and conducting preliminary limiting; according to the invention, uniform distribution of the anticoagulant in a blood sample is ensured through a dual oscillation mechanism, and formation of tiny clots is effectively prevented, so that the risk of blockage of a sampling needle, a pipeline and a detection cavity of an analytical instrument is avoided, and smooth operation of the instrument and timeliness of a detection process are guaranteed.

This invention relates to a pretreatment method for conventional chemical analysis of tobacco, comprising the following specific steps: S1, quantitative feeding: conveying and removing caps, adding powder, adding liquid, and resetting; S2, oscillating extraction; S3, filtration separation: needle assembly, secondary cap removal, liquid extraction, secondary capping, and filtration; S4, removal and resetting; wherein quantitative feeding is achieved through the cooperation of separate rotating gripper assemblies and clamping assemblies, which not only avoid mutual interference but also ensure accuracy through coordinated positioning; during filtration separation, the synchronously staggered rotating gripper assemblies and liquid extraction assemblies effectively avoid interference between steps, reduce the use of conveying mechanisms, and shorten the operation distance. This invention, without requiring excessive conveying mechanisms, makes each processing step simple and clear through the corresponding correlation and positioning between steps, resulting in more compact connections between adjacent steps and facilitating subsequent rapid cleaning.