近日台湾地区从统一、韩国辛拉面等多款泡面的油包中检出砷、铅、铜、汞等重金属。因此,方便面中重金属的检测引起人们的广泛关注。
本方案采用原子吸收的方法,对方便面调味包中的砷(As)、铅(Pb)、铜(Cu)、镉(Cd)、铁(Fe)、镁(Mg)、锌(Zn)、锰(Mn)、钙(Ca)等金属元素进行了检测。
Analysis of Cd in Instant Noodles (Soup Powder) Introduction: The soup powder for instant noodles contains various mineral components and organic compounds originating from the raw materials. As a result, the background absorbance is high at the time of cadmium analysis and the reduced analysis accuracy is a concern. The polarized Zeeman correction method is excellent in the spectral interference correction and the correction with a good accuracy for the ultra trace amount of lead is possible. INSTRUMENT CONDITIONS MEASUREMENTPARAMETERS GA AUTOSAMPLER Element : Cd Instrument : Z-2010 Atomization :GAWavelength : 228.8nm Lamp Current :7.5mA Slit Width : 1.3 nm Cuvette : Pyro HR Meas. Mode :Working Curve Signal Mode : BKG Corrected Curve Order :Linear Calculation : Peak Height Time Constant : 0.1 sec Temp. Control : ON Sample Volume : 20 uL Addition: Speed:4 MATRIX MODIFIER Matrix Modifier :100 mg/L Pd/Mg+10%HNO, Volume : 10 uL Order: After TEMPERATURE PROGRAM NOTE Stage Initial/Final TemperatureeHeating/Keeping Gas Flow Rate Gas (C) (Sec) (mL/min) 1 Drying 50/110 40/0 200 Normal 110/ 300 20/0 200 Normal2 Incineration 500/ 500 20/0 200 Normal3 Atomization 1500/ 1500 0/2 30 Normal 4 Cleaning 2800/2800 0/4 200 Normal 【Sample Preparation】4 mL of nitricacid was added to 0.5 g of the sampleand a microwave digestion wasperformed. After cooling, the volume was made up to 50 mL. CONC (ug/L) Mean ABS SD RSD REF ABS. 2.0 STD 1 0.00 0.0017 0.0001 5.88% 0.0028 STD 2 1.00 0.0718 0.0001 0.14% 0.0092 0.10 STD 3 2.00 0.1370 0.0005 0.36% 0.0178 1.0 1 0.04 0.0049 0.0001 2.04% 0.0619 0.04×0.05 L/0.5 g=0.004 pg/g0.0 2 0.06 0.0067 0.0006 8.96% 0.0469 R2:0.9996 0.00)- T7 0.06×0.05L/0.5 g=0.006 pg/g 0.0 2.0 3 0.04 0.0049 0.0000 0.00% 0.0517 CONC (ug/L) 0.04×0.05 L/0.5 g=0.004 pgg ABS 0.17 STD 3 2 ug/L STD 2 1ug/L 1 2 3 STD 10 ug/L AA 0.00 KEY WORDS Food Chemistry, Food, Health, Cadmium, Cd, Flameless, Graphite Furnace, AA,Z-2010, GA, Pyro HR Atomic Absorption Photometer (AA) Sheet No.. AA080092-00
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日立科学仪器(北京)有限公司为您提供《方便面中重金属检测方案(原子吸收光谱)》,该方案主要用于方便面(粉丝、米线)中重金属检测,参考标准--,《方便面中重金属检测方案(原子吸收光谱)》用到的仪器有日立ZA3000系列原子吸收分光光度计