The method is particularly applicable to thick products, to products containing suspendes matter and to products rich in sugars. If the products contain other dissolved substances, the results will be only approximate, nevertheless they may be considered conventionally as the soluble solids content. The principle consists in measuring of the refractive index of a test solution at 20 °C, using a refractometer, and use of tables correlating refractive index with soluble solids contents (expressed as sucrose), or direct reading of the content on the instrument.
Số hiệu tiêu chuẩn
ISO 2173
Tên tiêu chuẩn
Fruit and vegetable products; Determination of soluble solids content; Refractometric method
Ngày phát hành
1978-11-00
Tiêu chuẩn tương đương
NF V05-109 (1970-12-01), IDT * PN-A-75101-02 (1990-05-24), IDT * UNE 34217-1 (1981-11-15), IDT * UNE 34219 (1981-09-15), NEQ * NP-785 (1985), IDT * CSN ISO 2173 (1994-10-01), IDT * NEN 2838:1982 nl (1982-10-01), NEQ
Thay thế bằng
ISO 2173 (2003-12)
Từ khóa
Analysis * Chemical analysis and testing * Determination of content * Fruits * Refractometry * Vegetables * Chemical residues * Optical tests
ISO 2173
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