DTD-25 digital constant temperature digestion instrument

1DTD-25Digital constant temperature digestion instrumentWorking principle and purpose:

Place the sample and digestive solution in the digestive tract and perform gradient temperature controlled heating on a digital programmable constant temperature digestion instrument to digest the sample for various instrument and chemical analyses.

IIDTD-25Digital constant temperature digestion instrumentDigestive sample range:

Food samples, various water samples, biological samples(Blood, urine, hair)Cosmetics, etc.

IIIDTD-25Applicable analysis range of digital constant temperature digestion instrument:

Flame atomic absorption spectrometer and flameless atomic absorption spectrometer, atomic fluorescence spectrometer,ICP-AES,ICP-MSSample pretreatment using methods such as polarography and chemical analysis.

4DTD-25Technical parameters of digital constant temperature digestion instrument:

1Temperature range: room temperature~300℃ (Special note: Temperature refers to the temperature of the constant temperature block, the temperature of the digestion sample solution, and the boiling point of the digestion solution *).

2Stability: ±2℃。

3Number of digestive pores:18Hole, aperture:26mm, applicable to outer diameter25mmThe digestive tract.

4Power:1500W

5Temperature control method:LKTC-DSeries intelligent temperature controller

5DTD-25Digital constant temperature digestion instrument reagents and equipment:

1Digestive fluid: nitric acid+High acidity（4+1）

2Plastic tweezers or bamboo clips: used for soaking glass equipment10%Extract from nitric acid solution.

3Digestive tract: outer diameter25mmX length80mmFlat low hard glass,Used before digestion10%Soak in nitric acid overnight,Wash, air dry or use after drying.

VIDTD-25Digital constant temperature digestion instrument sample digestion method：

1、Food sample digestion:

（1）Move the digestion instrument into the kitchen and heat it up until120℃。

（2）Liquid sample (such as Baijiu,Purified water,Absorb natural water, etc1-10.0ml(Sample into digestive tube, add three glass beads) Place the digestive tube onto the digestion apparatus120Heat to near dryness at ℃ and add1.0ml(Digestive fluid)240Dissolve at a constant temperature of ℃ until almost dry, then remove and cool,Measure with a fixed volume.

（3）General foods (such as colored wine),drink,fruit candy,granules,Noodle food,Congee, etc.) weighing0.500-1.000gPut the sample into the digestive tract, add three glass beads, and add10.0mlPut the digestive juice and digestive tube into the digestion apparatus160℃ digestion approximately1-3hAfter the digestive juice is clarified,240Dissolve at a constant temperature of ℃ until *, remove and cool, and make up to a certain volume for measurement.

（4）Weigh foods containing a large amount of oil and sediment (such as meat, sausages, soybean oil, milk powder, milk sugar, chocolate, etc.)0.300-0.500gAdd three glass beads to the digestive tract and add10mlDigestive solution, place the digestive tube onto the digestion apparatus160℃ digestion3hIf the solution has been clarified240Dissolve at a constant temperature of ℃ until almost dry, remove and cool, and make up to a certain volume for measurement.

2、Water sample digestion:

absorb1.00-10.0mlPut the sample into the digestive tube, add three glass beads, and place the digestive tube onto the digestion apparatus120Heat to near dryness at ℃, add digestive agent (clean water added)0.50mlDigestive agent, sewage added2mlDigestive agent)240Dissolve at a constant temperature of ℃ until almost dry, then remove and cool,Measure with a fixed volume.

3、Hair sample digestion:

Weigh out0.200gAdd three glass beads from the sample to the digestive tract5.0mlDigestive solution on the digestion instrument160℃ digestion30min.240Dissolve at a constant temperature of ℃ until almost dry,Remove and cool, and measure to a certain volume.

4、Cosmetics digestion:

取0.100-0.200gAdd cosmetics to the digestive tract and add three glass beads5-10mlDigestive fluid, one hundred and sixty℃ digestion1-2hTo clarify the solution240Dissolve at a constant temperature of ℃ until almost dry, remove and cool, and measure to a certain volume.

7DTD-25Precautions for using digital constant temperature digestion instrument:

1Some analysis methods require the acid (digestive fluid) to be completely removed before analysis can be carried out,Such as polarographic analysis, white ink furnace measurement analysis, etc.

2Partial analysis methods require the use of different digestive fluids and temperature controls, such as mercury measurement, digestive fluid: nitric acid+Sulfuric acid（4+1）The temperature control is always on160℃。