71.040.20 实验室器皿和有关仪器 标准查询与下载
共找到 902 条与 实验室器皿和有关仪器 相关的标准，共 61 页
Safety requirements for electrical equipment for measurement, control and laboratory use. Part 2-010. Particular requirements for laboratory equipment for the heating of materials
- ICS
- 71.040.20
- CCS
- 发布
- 2011
- 实施
- 2013-01-01
5.1 This practice is adequate for use with other ASTM standards that specify the ice point as a reference. It is also intended to be adequate for most other ice-point reference purposes. 5.2 The ice point is a common practical industrial reference point of thermometry. The ice point is relatively simple to realize and provides a readily available natural fixed-point reference temperature. 5.3 Use in Resistance Thermometry: 5.3.1 The ice point was a defining fixed point on practical temperature scales prior to 1960. 5.3.2 The ITS-90 defines W(T90)8201;=8201;R(T90)/R(273.16 K), the measured resistance ratio of a Standard Platinum Resistance Thermometer (SPRT), in reference to the water triple point, not the ice point (1).3 In many instances, where the water triple point is not available, or when the accuracy obtainable with the water triple point is not required, reference to a properly established and maintained ice-point reference is used. For industrial-quality resistance thermometers, the resistance value is determined for 0 °C, and an uncertainty that is appropriate for the quality of the ice-point realization is assigned. 5.4 Use in Thermoelectric Thermometry: 5.4.1 In thermoelectric thermometry, the ice point is ordinarily used as the reference temperature (2). 5.4.2 Adequate thermoelectric reference requires that thermocouple junctions be well-coupled thermally to the bath, electrically isolated from each other and from the bath, and adequately immersed to avoid perturbing the reference-junction temperatures by radiation and longitudinal conduction of heat along the thermoelements (3 and 4). 5.5 Use in Liquid-in-Glass Thermometry: 5.5.1 In liquid-in-glass thermometry, the ice point is ordinarily used as the reference temperature (5). 5.5.2 The periodic recalibration of a liquid-in-...... ......
Standard Practice for Preparation and Use of an Ice-Point Bath as a Reference Temperature
- ICS
- 71.040.20
- CCS
- 发布
- 2011
- 实施
Test methods for determining the service performance of enamels are specified, i.e. for determining whether an enamel resists the specified treatment. The procedure insolve treatment for specified periods with an alkine detergent at 80 degrees centigrade and a dilute acid solution at room temperature.
Laboratory glassware -- Methods for assessing the chemical resistance of enamels used for colour coding and colour marking
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
ISO 24450:2005 specifies requirements and dimensions for an internationally acceptable series of conical flasks and of flat-bottom and round-bottom flasks with wide neck for general laboratory purpose. The flasks are provided for direct use in laboratory, fitting together with other equipment for general laboratory purposes, and for further work up to other products. For narrow-necked boiling flasks, ISO 1773 applies. For boiling flasks with conical ground joints, see ISO 4797.
Laboratory glassware -- Wide-necked boiling flasks
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The requirements specify the quality of the material. The different methods of test are specified. They concern the porosity and imperfections of glaze, the resistance to heat and sudden change in temperature, the resistance of glaze to high temperature, to acid and to alkali and the constancy of mass on ignition.
Porcelain laboratory apparatus -- Requirements and methods of test
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
Three types of crucibels are specified: Type 1, low form, type 2 medium form and type 3 tall form bases an a height/diameter ratio of 0,63; 0,8 and 1,25 resp. Further two types of lid are described: type D, a lid of slightly domed shape and typ R, a recessed lid. Material and construction are specified, shape and dimensions are shown in drawings and in a table.
Laboratory crucibles in porcelain and silica
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The requirements specify material including its hydrolytic resistance and thermal coefficient of expansion. The range of sizes and tolerance and external diameters and well thickness are tabled and described. In a second table the limits on bow for different external diameters are specified.
Laboratory glassware -- Borosilicate glass tubing
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
Describes a test method for determining the stresses which may occur after the sealing of two glasses by means of stress birefringence.
Glass-to-glass sealings -- Determination of stresses
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The requirements specify a series of capacities from 100 ml to 2000 ml. The construction with material, shape, radius of curvature of base and the vacuum connection are illustrated. The dimensions are tabled and the most important sections of the flask are drawn. The annex specify hydraulic external pressure tests.
Laboratory glassware -- Filter flasks
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
لا يوجد
Laboratory glassware -- Narrow-necked boiling flasks
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
لا يوجد
Laboratory glassware -- Separating funnels and dropping funnels
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
ISO 4142:2002 specifies a range of test tubes, suitable for general laboratory use, fabricated from borosilicate, neutral or soda/lime glass, which are designated Type I, Type II and Type III respectively.
Laboratory glassware -- Test tubes
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The principle of the method specified is measuring the portion of the 422,7 nm line absorbed by calcium atoms and of the 285,2 nm line absorbed by magnesium atoms using a flame atomic absorption spectrometer, and comparison with the absorption produced by reference solutions. Measures the concentrations of calcium and magnesium, expressed as their oxides CaO and MgO. Applies to the analysis of extract solutions obtained from any kind of glass or glassware including laboratory and pharmaceutical ware, food and drink packaging ware, tableware and kitchenware.
Glass and glasssware -- Analysis of extract solutions -- Part 3: Determination of calcium oxide and magnesium oxide by flame atomic absorption spectrometry
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
لا يوجد
Laboratory glassware -- Straight-bore glass stopcocks for general purposes
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
لا يوجد
Laboratory glassware -- Filter funnels
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The requirements deal with four series of conial ground joints. The conicity, the great diameter and the length of the ground joint including the tolerances are specified and tabled. In addition the surface finish and the peak-to-valley height are specified. In annex A a system of gauging for the diameters and lengths of these joints are given, in annex B a method of testing the leakage including the apparatus is describes.
Laboratory glassware -- Interchangeable conical ground joints
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The principle of the method specified is spraying the extract solution into the flame of the burner of an emission or absorption spectrometer, if necessary with the addition of a spectrochemical buffer solution, or into the flame of a filter flame spectrometer without this addition. For FES and FAAS, the lines at 589,0 nm and 766,5 nm, respectively, are used and compared with the measurements of reference solutions, for a flame filter spectrometer, the specific filters are used. Measures the concentrations of sodium and potassium, expressed as their oxides Na2O and K2O. Applies to the analysis of extract solutions obtained from any kind of glass or glassware.
Glass and glassware -- Analysis of extract solutions -- Part 2: Determination of sodium oxide and potassium oxide by flame spectrometric methods
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The principle of the method specified is complexing of the aluminium in the extract solution to be analyzed with chromazurol S, measuring the optical density of the resulting solution by means of a molecular absorption spectrometer at 545 nm using 10 mm optical cells. Measures the concentration of aluminium, expressed as its oxide Al2O3. Applies to the analysis of extract solutions obtained from any kind of glass or glassware including laboratory and pharmaceutical ware, food and drink packaging ware, tableware and kitchenware.
Glass and glassware -- Analysis of extract solutions -- Part 4: Determination of aluminium oxide by molecular absorption spectrometry
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
The requirements deal with the geometric charateristics to ensure interchangeability. The dimensions of the joint-ground zone and the outer diameter of the tube connected to the joint are given in a table and illustrated in a drawing. In addition the surface finish is specified. A system of gauges (stell balls) for testing the ball cup is tabled. In the annex a method of testing the leakage including the apparatus is described.
Laboratory glassware -- Interchangeable spherical ground joints
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
Filters are graded according to their pore size index in one of the eight classes specified. This is applicable to laboratory filters made of glass, vitreous silica, ceramics, metals and plastic materials. Annex A specifies a method for determination of pore size index. Annex B and C concern with a procedure for assessing uniformity of filters and for determination of air permeability.
Laboratory sintered (fritted) filters -- Porosity grading, classification and designation
- ICS
- 71.040.20
- CCS
- 发布
- 2010-10-31
- 实施
