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RIGOL L-3000 Quaternary Auto Sampling

发布时间: 2018 - 05 - 21

技术参数:○ 流速范围：0.001~10.000mL/min○ 流速准确度：±0.5%○ 最大耐压：9000 PSI○ 压力脉动：≤1%○ 控温范围：室温+5℃~70℃○ 温度准确度：±1.0%○ 温度稳定性：±0.1%○ 进样重复性：RSD≤0.3%○ 交叉污染：○ 线性：0.9999○ 采样率：100Hz

RIGOL L-3000 Quaternary Auto sampling，With the design of UPLC, the maximum pressure resistance is up to 9000psi. It is the liquid chromatography system with the highest pressure range in the same kind of instrument. The flow range is wide to 10mL/min, and its application field is extended from the conventional liquid phase to the fast liquid phase. The instrument has complete independent intellectual property rights, and its core parts are designed and manufactured independently. It can be widely used in pharmaceutical analysis, environmental monitoring, food safety, petrochemical industry, ag...

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RIGOL L-3000 ELSD系统

发布时间: 2018 - 05 - 21

○ 流速范围：0.001~10.000mL/min○ 流速准确度：±0.5%○ 最大耐压：9000 PSI○ 压力脉动：≤1%○ 控温范围：室温+5℃~70℃○ 温度准确度：±1.0%○ 温度稳定性：±0.1%○ 进样重复性：RSD≤0.3%○ 交叉污染：○ 线性：0.9999○ 采样率：100Hz○ 光源：高效LED 470nm

RIGOL L-3000高效液相色谱系统采用UPLC规格设计，最高耐压达9000psi，是同类仪器中耐压范围最高的液相色谱系统，流量范围宽至10mL/min，将其应用领域从常规液相拓展到快速液相。该款仪器具有完全自主知识产权，关键核心部分均为自主设计、加工制造。可广泛应用于药物分析、环境监测、食品安全、石油化工、农林牧渔、教育科研等各个领域。

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RIGOL L-3000 DAD系统

发布时间: 2018 - 05 - 21

○ 流速范围：0.001~10.000mL/min○ 流速准确度：±0.5%○ 最大耐压：9000 PSI○ 压力脉动：≤1%○ 控温范围：室温+5℃~70℃○ 温度准确度：±1.0%○ 温度稳定性：±0.1%○ 进样重复性：RSD≤0.3%○ 交叉污染：○ 线性：0.9999○ 采样率：100Hz○ 阵列数：1024阵列

RIGOL L-3000高效液相色谱系统采用UPLC规格设计，最高耐压达9000psi，是同类仪器中耐压范围最高的液相色谱系统，流量范围宽至10mL/min，将其应用领域从常规液相拓展到快速液相。该款仪器具有完全自主知识产权，关键核心部分均为自主设计、加工制造。可广泛应用于药物分析、环境监测、食品安全、石油化工、农林牧渔、教育科研等各个领域。

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RIGOL L-3000 二元自动系统

发布时间: 2018 - 05 - 21

○ 流速范围：0.001~10.000mL/min○ 流速准确度：±0.5%○ 最大耐压：9000 PSI○ 压力脉动：≤1%○ 控温范围：室温+5℃~70℃○ 温度准确度：±1.0%○ 温度稳定性：±0.1%○ 进样重复性：RSD≤0.3%○ 交叉污染：○ 线性：0.9999○ 采样率：100Hz

RIGOL L-3000高效液相色谱系统采用UPLC规格设计，最高耐压达9000psi，是同类仪器中耐压范围最高的液相色谱系统，流量范围宽至10mL/min，将其应用领域从常规液相拓展到快速液相。该款仪器具有完全自主知识产权，关键核心部分均为自主设计、加工制造。可广泛应用于药物分析、环境监测、食品安全、石油化工、农林牧渔、教育科研等各个领域。

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RIGOL L-3000 四元手动系统

发布时间: 2018 - 05 - 21

○ 流速范围：0.001~10.000mL/min○ 流速准确度：±0.5%○ 最大耐压：9000 PSI○ 压力脉动：≤1%○ 控温范围：室温+5℃~70℃○ 温度准确度：±1.0%○ 温度稳定性：±0.1%○ 采样率：100Hz

RIGOL L-3000高效液相色谱系统采用UPLC规格设计，最高耐压达9000psi，是同类仪器中耐压范围最高的液相色谱系统，流量范围宽至10mL/min，将其应用领域从常规液相拓展到快速液相。该款仪器具有完全自主知识产权，关键核心部分均为自主设计、加工制造。可广泛应用于药物分析、环境监测、食品安全、石油化工、农林牧渔、教育科研等各个领域。

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Contact information

Phone： 86-010-58629061

Cell phone： 18515336778

Mailbox：contact@aidphe.com

China · Beijing · Changping

Contact address：China Beijing Changping Wanjia Pioneering Park Zone B

Determination of Melamine in Raw Milk and Dairy Products by HPLC

Date： 2018-06-05

According to the first method of high performance liquid chromatography in GB/T 22388-2008 Method for the Detection of Melamine in Raw Milk and Dairy Products, a certain amount of homogeneous raw milk or dairy products (hereinafter referred to as samples) was weighed and added with acetonitrile to precipitate and separate protein, and trichloroacetic acid solution was added to convert melamine into melamine acidifier under acidic conditions, ultrasonic, centrifugation and filtration separation. After protein precipitation, the sample solution was injected into high performance liquid chromatography after purification by mixed cation exchange solid phase extraction column and concentration by nitrogen blowing. The melamine content in the sample was determined by reversed phase chromatography ion pair method, ultraviolet detector and standard working curve method.

The operation steps include: 2.1, reagent solvent preparation; 2.2, standard working curve preparation; 2.3, sample pretreatment; 2.4, chromatographic analysis; 2.5, data processing.

u Requirements for laboratories:

Laboratory environmental requirements:

Operating ambient temperature： 20～30℃

Relative humidity： 20%-80% without condensation

Noise： less than 70 dB

Fire Protection： Have Fire Protection Equipment

Ventilation： Good ventilation environment

Location： away from high electromagnetic interference and high vibration equipment

Solvent Compatibility： Solvent Compatibility with Structural Materials

Electrical Indicators：

Power supply voltage： 100 VACRMS - 240 VACRMS

Voltage frequency： 50 Hz - 60 Hz