当前位置: 首页? 政策法规? 国外法规? §173.350 经燃烧产生的气体(Combustion product gas)

§173.350 经燃烧产生的气体(Combustion product gas)

扫描二维 分享好友和朋友圈
放大字体缩小字体2011-07-13 02:47:25 来源:GPO 浏览次数9span id="hits">3403
核心提示:本食品添加剂由丁烷、丙烷或天然气在空气中受控燃烧下制得,一氧化碳含量不得超?.5%,用以驱除饮料及其它食品加工、贮藏或包装中的氧气,但不包括新鲜肉类、/div>
发布单位
FDA
FDA
发布文号 暂无
发布日期 暂无 生效日期 暂无
有效性状?/th> 废止日期 暂无
备注 本食品添加剂由丁烷、丙烷或天然气在空气中受控燃烧下制得,一氧化碳含量不得超?.5%,用以驱除饮料及其它食品加工、贮藏或包装中的氧气,但不包括新鲜肉类、/td>

   173.350 Combustion product gas.

  The food additive combustion product gas may be safely used in the processing and packaging of the foods designated in paragraph (c of this section for the purpose of removing and displacing oxygen in accordance with the following prescribed conditions:

  (a The food additive is manufactured by the controlled combustion in air of butane, propane, or natural gas. The combustion equipment shall be provided with an absorption-type filter capable of removing possible toxic impurities, through which all gas used in the treatment of food shall pass; and with suitable controls to insure that any combustion products failing to meet the specifications provided in this section will be prevented from reaching the food being treated.

  (b The food additive meets the following specifications:

  ? Carbon monoxide content not to exceed 4.5 percent by volume.

  ? The ultraviolet absorbance in isooctane solution in the range 255 millimicrons to 310 millimicrons not to exceed one-third of the standard reference absorbance when tested as described in paragraph (e of this section.

  (c It is used or intended for use to displace or remove oxygen in the processing, storage, or packaging of beverage products and other food, except fresh meats.

  (d To assure safe use of the additive in addition to the other information required by the act, the label or labeling of the combustion device shall bear adequate directions for use to provide a combustion product gas that complies with the limitations prescribed in paragraph (b of this section, including instructions to assure proper filtration.

  (e The food additive is tested for compliance with paragraph (b)(2 by the following empirical method:

  Spectrophotometric measurements. All measurements are made in an ultraviolet spectrophotometer in optical cells of 5 centimeters in length, and in the range of 255 millimicrons to 310 millimicrons, under the same instrumental conditions. The standard reference absorbance is the absorbance at 275 millimicrons of a standard reference solution of naphthalene (National Bureau of Standards Material No. 577 or equivalent in purity containing a concentration of 1.4 milligrams per liter in purified isooctane, measured against isooctane of the same spectral purity in 5-centimeter cells. (This absorbance will be approximately 0.30.(/p>

  Solvent. The solvent used is pure grade isooctane having an ultraviolet absorbance not to exceed 0.05 measured against distilled water as a reference. Upon passage of purified inert gas through some isooctane under the identical conditions of the test, a lowering of the absorbance value has been observed. The absorbance of isooctane to be used in this procedure shall not be more than 0.02 lower in the range 255 millimicrons to 310 millimicrons, inclusive, than that of the untreated solvent as measured in a 5-centimeter cell. If necessary to obtain the prescribed purities, the isooctane may be passed through activated silica gel.

  Apparatus. To assure reproducible results, the additive is passed into the isooctane solution through a gas-absorption train consisting of the following components and necessary connections:

  1. A gas flow meter with a range up to 30 liters per hour provided with a constant differential relay or other device to maintain a constant flow rate independent of the input pressure.

  2. An absorption apparatus consisting of an inlet gas dispersion tube inserted to the bottom of a covered cylindrical vessel with a suitable outlet on the vessel for effluent gas. The dimensions and arrangement of tube and vessel are such that the inlet tube introduces the gas at a point not above 51/4inches below the surface of the solvent through a sintered glass outlet. The dimensions of the vessel are such, and both inlet and vessel are so designed, that the gas can be bubbled through 60 milliliters of isooctane solvent at a rate up to 30 liters per hour without mechanical loss of solvent. The level corresponding to 60 milliliters should be marked on the vessel.

  3. A cooling bath containing crushed ice and water to permit immersion of the absorption vessel at least to the solvent level mark.

  Caution. The various parts of the absorption train must be connected by gas-tight tubing and joints composed of materials which will neither remove components from nor add components to the gas stream. The gas source is connected in series to the flow-rate device, the flow meter, and the absorption apparatus in that order. Ventilation should be provided for the effluent gases which may contain carbon monoxide.

  Sampling procedure. Immerse the gas-absorption apparatus containing 60 milliliters of isooctane in the coolant bath so that the solvent is completely immersed. Cool for at least 15 minutes and then pass 120 liters of the test gas through the absorption train at a rate of 30 liters per hour or less. Maintain the coolant bath at 0 C throughout. Remove the absorption vessel from the bath, disconnect, and warm to room temperature. Add isooctane to bring the contents of the absorption vessel to 60 milliliters, and mix. Determine the absorbance of the solution in the 5-centimeter cell in the range 255 millimicrons to 310 millimicrons, inclusive, compared to isooctane. The absorbance of the solution of combustion product gas shall not exceed that of the isooctane solvent at any wavelength in the specified range by more than one-third of the standard reference absorbance.

  更多关于美国 FDA 可直接加入食品中的辅助性食品添加剂的种类法规,请点出a href="//www.sqrdapp.com/law/dongtai/171830.html">美国FDA 21 CFR ?73部分可直接加入食品中的辅助性食品添加剂种类汇怺/a>

食品伙伴网提供标准法规解读、舆情监控、合规咨询、申报注册等服务、br/>电询?535-2129301
QQ?891238009
食品标法? border=
实时把握 食品标法动?/span>
请扫码关?span class="color2">食品标法圇/span>

声明9/p>

凡本网所有原?编译文章及图片、图表的版权均属食品伙伴网所有,如要转载,需注明“信息来源:食品伙伴网”、br> 凡本网注明“信息来源:XXX(非食品伙伴网)”的作品,均转载自其他媒体,转载目的在于传递更多的信息,并不代表本网赞同其观点和对其真实性负责、br> 邮箱:law#www.sqrdapp.com(发邮件时请?换成@ QQ?39307733

[ 政策法规搜索] [ 加入收藏] [ 告诉好友] [ 打印本文] [ 关闭窗口]

Baidu
map