43 results about "Carbon isotope composition" patented technology

The invention discloses a method for acquiring bicarbonate using share of plants in field habitat, and belongs to the field of crop information detection technologies and ecological environmental management. The method includes acquiring extracellular atmospheric carbon dioxide concentration and intercellular carbon dioxide concentration data by the aid of portable photosynthetic apparatuses, measuring air carbon dioxide and soil bicarbonate using stable carbon isotope fractionation values of the plants at different seedling ages and different growth periods in different environments, and combining atmospheric carbon dioxide stable carbon isotope composition and rhizosphere soil bicarbonate stable carbon isotope composition of the plants with each other; acquiring instant information of the bicarbonate using share of the plants at the different seedling ages and the different growth periods in the different environments according to double-end-member isotope hybrid models. The method has the advantages that atmospheric carbon dioxide using share of the plants at the different seedling ages and the different growth periods in the field habitat can be quickly, conveniently and accurately acquired in real time by the aid of the method, and the bicarbonate using share of the plants in the field habitat also can be acquired by the aid of the method.

The invention relates to a method for detecting exogenously added ethyl caproate and ethyl lactate in liquor on the basis of a stable isotope technique and principle and belongs to the technical field of authenticity identification of liquor. The method mainly comprises steps as follows: (1), the carbon isotope composition of a target chemical compound (ethyl caproate and / or ethyl lactate) in a fragrance type real liquor sample is detected, and the carbon isotope composition of a carbon isotope endogenous marker of the target chemical compound is detected, and the average difference of delta13C values between the target chemical compound and an internal standard substance as well as the standard deviation sigma is determined; (2), delta13C values of the target chemical compound and the internal standard substance of the target chemical compound in the to-be-detected liquor sample are detected, and the difference value delta13C (to-be-detected sample) of the target chemical compound and the internal standard substance is calculated; (3), whether the to-be-detected sample contains the exogenously added ethyl caproate and / or ethyl lactate is judged. The method used for effectively detecting whether the liquor contains exogenously added ethyl caproate and / or ethyl lactate is established with a stable isotope technique.