標準編號:	GB/T 5009.91-2003
中文名稱:	食品中鉀、鈉的測定
英文名稱:	Determination of potassium and sodium in foods
中標分類:	C53    食品衛(wèi)生
行業(yè)分類:	GB    國家標準
ICS分類:	67.040 67.040    食品綜合 67.040
發(fā)布機構(gòu):	衛(wèi)生部
發(fā)布日期:	2003-08-11
實施日期:	2004-1-1
標準狀態(tài):	superseded
被新標準替代:	GB 5009.91-2017 食品安全國家標準 食品中鉀、鈉的測定
被替代日期:	2017-10-6
替代舊標準:	GB/T 12397-1990 食物中鉀、鈉的測定方法
翻譯語言:	英文
文件格式:	PDF
中文字符數(shù):	3000 字
翻譯價格(元):	280.0
交付時間:	付款后 1 個工作日

1 Scope This standard specifies determination of potassium and sodium in foods by flame emission spectrometric method. This standard is applicable to the determination of potassium and sodium in various foods. Detection limits of this method: 0.05μg for potassium and 0.3μg for sodium; linear range: 0.1μg~0.5μg for potassium; 1.0μg~4.0μg for sodium . 2 Principle Treat the samples, transfer it into flame photometer; after the sample is atomized by the flame, and determine the emission intensity of potassium and sodium respectively. The emission wavelength of potassium is 766.5nm and that of the sodium is 589nm. Their emission intensity is directly proportional to their content and is compared with standard series to determine their content. 3 Reagents 3.1 Nitric acid. 3.2 Perchloric acid. 3.3 Digestive fluid of mixed acid: nitric acid + perchloric acid=4+1.

Foreword I 1 Scope 2 Principle 3 Reagents 4 Apparatuses 5 Analysis Procedures 6 Result Calculation 7 Precision