In Situ Determination of Urea in Milk Employing a Portable and Low-Cost LED Photometer

被引：12

作者：

Suarez, Willian Toito ^{[1
]}

de Alvarenga Junior, Benedito Roberto ^{[1
]}

Krambeck Franco, Mathews de Oliveira ^{[1
]}

Gabriel, Wesley Lira ^{[1
]}

de Oliveira, Denilson Mendes ^{[1
]}

dos Santos, Vagner Bezerra ^{[2
]}

机构：

[1] Univ Fed Vicosa, Dept Quim, Ctr Ciencias Exatas & Tecnol, BR-36570900 Vicosa, MG, Brazil

[2] Univ Fed Para, Inst Ciencias Exatas & Nat, Belem, PA, Brazil

来源：

FOOD ANALYTICAL METHODS | 2018年 / 11卷 / 04期

关键词：

LED photometer; Urea; Milk; Food control; DAIRY HERDS; MICROCONTROLLED TURBIDIMETER; COWS MILK; NITROGEN; PROTEIN; NEPHELOMETER; INJECTION; VARIABLES; COMPACT; SYSTEM;

D O I：

10.1007/s12161-017-1087-8

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

A low-cost and portable LED photometer was developed and applied for the in situ determination of urea in milk. The determination was based on Berthelot's reaction. After optimization, the best experimental variables, the detection limit and quantification limit were 1.8 x 10(-4) and 8.0 x 10(-4) mol L-1, respectively. The percentage recovery varied between 95.6 and 105%. The paired t test was performed for the cow and goat milk determination and the results agreed at a 95% level of confidence for the in situ determination. Supported by the results, the analytical method based on LED photometer demonstrated that it can be employed for urea determination in food production for quality purpose, and small rural producers can evaluate the quality of herd feeding due to the easy handling, portability, fast instrumental response, and low cost of the materials used.

引用

页码：1149 / 1154

页数：6

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