इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 16033 (2012): Instant Coffee - Determination of Free-Flow and Compacted Bulk Densities [FAD 6: Stimulant Foods] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 16033 : 2012 ISO 8460 : 1987 Hkkjrh; ekud baLVsaV dkWiQh eqDr&çokg vkSj — la?kr cYd ?kuRo Kkr djuk Indian Standard INSTANT COFFEE — DETERMINATION OF FREE-FLOW AND COMPACTED BULK DENSITIES ICS 67.140.10 © BIS 2012 B U R E A U O F I N D I A N S T A N D A R D S MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 December 2012 Price Group 3 Stimulant Foods Sectional Committee, FAD 6 NATIONAL FOREWORD This Indian Standard which is identical with ISO 8460 : 1987 ‘Instant coffee – Determination of free- flow and compacted bulk densities’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Stimulant Foods Sectional Committee and approval of the Food and Agriculture Division Council. The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following: a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’. b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker. In this adopted standard, reference appear to the following International Standard for which Indian Standard also exists. The corresponding Indian Standard which is to be substituted in its place is listed below along with its degree of equivalence for the edition indicated: International Standard Corresponding Indian Standard Degree of Equivalence ISO 6670 : 2002 Instant coffee — IS 16035 : 2012 Instant coffee — Identical Sampling method for bulk units with Sampling method for bulk units with liners liners The technical committee has reviewed the provision of the following International Standard referred in this adopted standard and has decided that it is acceptable for use in conjunction with this standard: International Standard Title ISO 787-11 General methods of test for pigments and extenders — Part 11: Determination of tamped volume and apparent density after tamping In reporting the result of a test or analysis made in accordance with this standard, if the final value, observed or calculated is to be rounded off, it shall be done in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. IS 16033 : 2012 ISO 8460 : 1987 INTERNATIONAL STANDARD ISO 8460 : 1987 (EI Indian Standard INSTANT COFFEE — DETERMINATION OF FREE-FLOW AND COMPACTED BULK DENSITIES Instant coffee - Determination of free-flow and compacted bulk densities 0 Introduction ized, cheap, and easily available throughout those Parts of the world where instant coffee is produced, blended, reprocessed A knowledge of the bulk density of instant coffee is essential to and packed. trade in that commodity for it determines the volume occupied by a given mass and hence is an important factor in filling con- tainers correctly and for controlling the mass of instant coffee. 1 Scope and field of application Bulk density is defined as the ratio of mass to volume. The This International Standard specifies two methods for the volume of a given Sample of instant coffee varies, according to determination of the bulk density of instant coffee : its history of handling, due to compaction (reversible) and powder breakdown (irreversible) effects. Bulk densities tan be a) free-flow bulk density (section one) ; expressed in two ways : free-flow density and compacted density. b) compacted bulk density (section two). Instant coffee is friable and subject to irreversible powder breakdown effects which may occur with repeated determina- 2 References tions of the compacted density. Because both bulk densities (and in particular the compacted density) depend so critically ISO 787-11, General methods of test for Pigments and on the methods used for handling, it is particularly important extenders - Part 17 : Determination of tamped volume and that the methods adopted for their measurement be as simple apparen t density a ftei tamping. and as independent of the human factors as possible. lt is also important that any mechanical apparatus needed is standard- ISO 6670, Soluble coffee in cases with Jiners - Sampling. 1 IS 16033 : 2012 ISO 8460 : 1987 (E) ISO 8460 : 1987 Section one : Determination of free-flow bulk density 3 Definition 7.1 Weigh the measuring receptacle (5.2.2) to the nearest 0,l g. Pour the laboratory Sample from its Container into the For the purposes of this International Standard, the following funnel (5.24, allowing it to flow freely into the measuring definition applies. receptacle (5.2.2) until the latter overflows. Remove the excess instant coffee, using the spatula or other free-flow bulk density (of instant coffee) : The ratio of the suitable implement (5.3) to form a plane surface level with the mass of instant coffee to the volume it occupies (mass per unit top of the measuring receptacle. Avoid moving, shaking or volume) after it has been poured freely into a receptacle under vibrating the measuring receptacle before the excess instant the conditions specified in this International Standard. coffee has been removed. lt is conventionally expressed in grams per millilitre. Remove the measuring receptacle and weigh the measuring receptacle and its contents to the nearest 0,l g. 4 Principle 7.2 Carry out two determinations on the same laboratory Sample or on two different Iaboratory samples if the size of the Pouring a Sample through a specified funnel into a specified laboratory Sample available is insufficient to carry out two receptacle of known volume and weighing the contents of the separate determinations. receptacle. 8 Expression of results 5 Apparatus 8.1 Method of calculation and formula 5.1 Balance, accurate to 0,l g. The free-flow bulk density, expressed in grams per millilitre, is equal to 5.2 Apparatus for determination of free-flow bulk den- sity, having the dimensions shown in figure 1 and the arrange- m2 - ml ment shown in figure 2, and consisting of the following Parts. V 5.2.1 Funnel, made of stainless steel, firmly mounted on a where support attached to a rigid base. The exact dimensions shall rnl is the mass, in grams, of the measuring receptacle; conform to those given in figure 1. 1722 is the mass, in grams, of the measuring receptacle full 5.2.2 Measuring receptacle, cylindrical, made of stainless of instant coffee; steel, of approximate capacity 205 ml. V is the capacity, in millilitres, of the measuring recep- tacle. The capacity of the receptacle shall be known to the nearest millilitre. The exact dimensions shall conform to those given in Take as the result the arithmetic mean of the values obtained in figure 1. the two determinations (7.21, provided that the requirement for repeatability (sec 8.2) is satisfied. If it is not, the determinations The 1d istance between the bottom of the funnel and the top of shall be repeated. the receptacle shall be kept constant at 40,O + 1,5 mm. 8.2 Repeatability 53 Spatula, or other suitable implement having a straight e;lge. The differente between the values obtained in the two deter- minations (7.21, carried out in rapid succession by the same Operator on the same laboratory Sample (however, see 7.2) 6 Sampling using the same apparatus, shall not exceed 2 % of the mean. See ISO 6670, in particular annex B. 9 Test report The test report shall show the method used and the results ob- 7 Procedure tained. lt shall also mention any operating details not specified in this International Standard, or regarded as optional, together WARNING - On account of the hygroscopic Character of with details of any incidents likely to have influenced the instant coffee, the determination should not be carried results. out in a humid atmosphere, for example higher than 60 % relative humidity. The use of an effective dehumidifica- The test report shall include all the information necessary for tion unit is therefore recommended. the complete identification of the Sample. 2 2 IISSO 18640603 3: 1:9 2870 1(E2) ISO 8460 : 1987 Section two : Determination of compacted bulk density 10 Definition 14.1 Set the tapping volumeter (12.2) to give 300 taps. For the purposes of this International Standard, the following Weigh 25,0 g of the laboratory Sample to the nearest 0,l g and definition applies. transfer to the graduated measuring cylinder (12.2.1). Attach the cylinder to the tapping volumeter by means of the holder (12.2.21, and allow the volumeter to tap 300 times. Read the compacted bulk density (of instant coffee) : The ratio of volume of the instant coffee from the cylinder to the nearest the mass of instant coffee to the volume it occupies (mass per 2 ml. unit volume) after it has been subjected to a fixed number of taps (usually 300) under the conditions specified in this Inter- national Standard. 14.2 Carry out two determinations on the same laboratory Sample. lt is conventionally expressed in grams per millilitre. 14.3 In cases where it is suspected that the instant coffee may be subject to breakdown, the volume may be determined 11 Principle using a series of 50 tap sequences to establish whether there is a limiting minimum volume, or whether the volume diminishes Determination of the volume of a given mass of instant coffee continuously. In the latter case, record all the volumes after a fixed number of taps (usually 300) in a tapping measured. By agreement between the interested Parties, the volumeter. compacted bulk density may be recorded as that derived from the volume after the first 100 taps or any other number of taps. 12 Apparatus 15 Expression of results 12.1 Balance, accurate to 0,l g. 15.1 Method of calculation and formula 12.2 Tapping volumeter, as specified in ISO 787-11 (sec also figure 31, comprising the following Parts. The compacted bulk density, expressed in grams per millilitre, is equal to 12.2.1 Graduated measuring cylinder, made of glass, of capacity 250 ml and graduated in divisions of 2 ml. m -v 12.2.2 Holder, for the measuring cylinder (12.2.1), with a shaft. where m is the mass, in grams, of the test Portion; 12.2.3 Cam, which lifts the shaft of the holder and the measuring cylinder once per revolution and which has a fre- V is the volume, in millilitres, occupied by the test Portion quency of rotation of 250 + 15 min - 1. after compaction. Take as the result the arithmetic mean of the values obtained in 12.2.4 Anvil, on which the raised shaft falls from a height of the two determinations (14.21, provided that the requirement 3 f 0,l mm. for repeatability (see 15.2) is satisfied. If it is not, the determina- tions shall be repeated. 12.2.5 Counter, to count the number of revolutions of the cam. 15.2 Repeatability . 12.2.6 Sleeve, to guide the shaft, constructed of a suitable The differente between the values obtained in the two deter- material to give minimum friction. minations (14.21, carried out in rapid succession by the same Operator on the same laboratory Sample using the same apparatus, shall not exceed 2 % of the mean. 13 Sampling See ISO 6670, in particular annex B. 16 Test report The test report shall show the method used and the results 14 Procedure obtained. lt shall also mention any operating details not specified in this International Standard, or regarded as WARNING - On account of the hygroscopic Character of optiona!, together with details of any incidents likely to have instant coffee, the determination should not be carried influenced the results. out in a humid atmosphere, for example higher than 60 % relative humidity. The use of an effective dehumidifica- The test report shall include all the information necessary for tion unit is therefore recommended. the complete identification of the Sample. 3 ISOIS 8146600 3: 319 :8 72 0(E1)2 ISO 8460 : 1987 Dimensions in miilimetres s x .C- T, Measuring receptacle 2 -bohrne approximately 205 ml) 0.- -t I 64,5 cb t 0,s ( Inside diameter) I Figure 1 Schematic diagram of the apparatus for determining free-flow bulk density 4 ISO 8460 : 1987 (EI IS 16033 : 2012 ISO 8460 : 1987 Figure 2 - Apparatus for determining free-flow bufk density 5 5