{
  "@context": "https://schema.org",
  "@type": "Dataset",
  "name": "Hongji Potato Flakes & Powder — Specification Values",
  "url": "https://docs.hjpotatoflakes.com/data/specs.json",
  "creator": {
    "@type": "Organization",
    "name": "Zhangjiakou Hongji Agriculture Technology Development Co., Ltd.",
    "alternateName": [
      "Hongji Agriculture",
      "弘基农业"
    ],
    "url": "https://hjpotatoflakes.com"
  },
  "version": "1.0",
  "dateModified": "2026-09-23",
  "unit_conventions": {
    "moisture": "% (w/w)",
    "bulk_density": "g/L",
    "mesh_reference": "ASTM E11 / ISO 3310-1 (No. 60 = 250 µm)"
  },
  "products": [
    {
      "product": "Potato Flakes",
      "document_code": "HJ-TD-PE-03-PK/1-01-D-2025",
      "specification": [
        {
          "parameter": "Moisture",
          "value": "≤ 9.0",
          "unit": "%",
          "value_type": "guaranteed",
          "method": "GB 5009.3 / AOAC 925.10"
        },
        {
          "parameter": "Moisture",
          "value": "6–8",
          "unit": "%",
          "value_type": "typical (drum-drying process target; ≤ 6.0 at the doctor blade)"
        },
        {
          "parameter": "Ash (dry basis)",
          "value": "≤ 4.0",
          "unit": "%",
          "value_type": "guaranteed",
          "method": "GB 5009.4 / AOAC 923.03"
        },
        {
          "parameter": "Reducing sugars",
          "value": "≤ 3.0",
          "unit": "%",
          "value_type": "guaranteed",
          "method": "GB 5009.7 / DNS colorimetric"
        },
        {
          "parameter": "Total sugars",
          "value": "≤ 3.0",
          "unit": "% (dwb)",
          "value_type": "guaranteed"
        },
        {
          "parameter": "Blue value",
          "value": "≤ 500",
          "unit": "index",
          "value_type": "guaranteed",
          "method": "SB/T 10752 Annex A"
        },
        {
          "parameter": "Starch",
          "value": "≥ 75.0",
          "unit": "% (dwb)",
          "value_type": "guaranteed",
          "method": "AOAC 996.11"
        },
        {
          "parameter": "Protein (N×6.25)",
          "value": "6.0–9.0",
          "unit": "% (dwb)",
          "value_type": "guaranteed",
          "method": "AOAC 984.13"
        },
        {
          "parameter": "Bulk density (loose)",
          "value": "350–500",
          "unit": "g/L",
          "value_type": "guaranteed",
          "method": "HJ-QA-010-SOP-02"
        },
        {
          "parameter": "Bulk density (tapped)",
          "value": "450–600",
          "unit": "g/L",
          "value_type": "guaranteed",
          "method": "HJ-QA-010-SOP-03"
        },
        {
          "parameter": "Particle size",
          "value": "3–5",
          "unit": "mm",
          "value_type": "as produced"
        },
        {
          "parameter": "Particle size",
          "value": "0.25–3.35",
          "unit": "mm",
          "value_type": "delivered sieve distribution (breakage in handling)"
        },
        {
          "parameter": "Rehydration ratio",
          "value": "7.5 : 1",
          "unit": "g water / g product",
          "value_type": "guaranteed",
          "method": "HJ-QA-025 (70 °C, 5 min, 1000×g 45 s)"
        },
        {
          "parameter": "Colour L*",
          "value": "≥ 88.0",
          "unit": "CIELAB D65/10°",
          "value_type": "guaranteed"
        },
        {
          "parameter": "Shelf life",
          "value": "24",
          "unit": "months",
          "value_type": "guaranteed (standard packaging); 36 months vacuum or N₂-flushed"
        },
        {
          "parameter": "Net weight",
          "value": "20 / 25",
          "unit": "kg",
          "value_type": "standard packaging"
        },
        {
          "parameter": "Minimum order quantity",
          "value": "10",
          "unit": "MT",
          "value_type": "standard grade; 5 MT premium or fine milled"
        }
      ],
      "contaminants": [
        {
          "parameter": "Lead (Pb)",
          "value": "≤ 0.5",
          "unit": "mg/kg",
          "method": "GB 5009.12"
        },
        {
          "parameter": "Total arsenic (As)",
          "value": "≤ 0.5",
          "unit": "mg/kg",
          "method": "GB 5009.11"
        }
      ],
      "microbiological": [
        {
          "parameter": "Total plate count (TPC)",
          "limit": "≤ 10,000",
          "unit": "CFU/g",
          "method": "ISO 4833-1:2013"
        },
        {
          "parameter": "Coliforms",
          "limit": "≤ 10",
          "unit": "CFU/g",
          "method": "ISO 4832:2006"
        },
        {
          "parameter": "Yeast & mould",
          "limit": "≤ 100",
          "unit": "CFU/g",
          "method": "ISO 21527-2:2008"
        },
        {
          "parameter": "Staphylococcus aureus",
          "limit": "≤ 10",
          "unit": "CFU/g",
          "method": "ISO 6888-1:2021"
        },
        {
          "parameter": "Salmonella",
          "limit": "Negative / 25 g",
          "method": "ISO 6579-1:2017"
        },
        {
          "parameter": "Listeria monocytogenes",
          "limit": "Negative / 25 g",
          "method": "ISO 11290-1:2017"
        },
        {
          "parameter": "Aerobic spore formers",
          "limit": "≤ 500",
          "unit": "CFU/g",
          "method": "ISO 7933:2004"
        }
      ]
    },
    {
      "product": "Potato Powder (60 mesh)",
      "document_code": "HJ-TD-PT-002 / powder technical datasheet",
      "specification": [
        {
          "parameter": "Moisture",
          "value": "≤ 6.0",
          "unit": "%",
          "value_type": "guaranteed",
          "method": "AOAC 925.10 / 925.45"
        },
        {
          "parameter": "Ash (dry basis)",
          "value": "≤ 4.5",
          "unit": "%",
          "value_type": "guaranteed",
          "method": "AOAC 923.03"
        },
        {
          "parameter": "Reducing sugars",
          "value": "≤ 3.0",
          "unit": "% (dwb)",
          "value_type": "guaranteed",
          "method": "DNS colorimetric"
        },
        {
          "parameter": "Starch",
          "value": "≥ 73.0",
          "unit": "% (dwb)",
          "value_type": "guaranteed",
          "method": "AOAC 996.11"
        },
        {
          "parameter": "Protein (N×6.25)",
          "value": "6.0–9.0",
          "unit": "% (dwb)",
          "value_type": "guaranteed",
          "method": "AOAC 984.13"
        },
        {
          "parameter": "Bulk density (loose)",
          "value": "480–620",
          "unit": "g/L",
          "value_type": "guaranteed",
          "method": "HJ-QA-010-SOP-02"
        },
        {
          "parameter": "Bulk density (tapped)",
          "value": "600–780",
          "unit": "g/L",
          "value_type": "guaranteed",
          "method": "HJ-QA-010-SOP-03"
        },
        {
          "parameter": "Particle size",
          "value": "≥ 95% passing 250",
          "unit": "µm (60 mesh)",
          "value_type": "guaranteed"
        },
        {
          "parameter": "Rehydration ratio",
          "value": "6.0 : 1",
          "unit": "g water / g product",
          "value_type": "guaranteed",
          "method": "HJ-QA-025"
        },
        {
          "parameter": "Colour L*",
          "value": "≥ 85.0",
          "unit": "CIELAB D65/10°",
          "value_type": "guaranteed"
        },
        {
          "parameter": "Shelf life",
          "value": "24",
          "unit": "months",
          "value_type": "guaranteed (standard packaging); 36 months vacuum-packed"
        },
        {
          "parameter": "Net weight",
          "value": "25",
          "unit": "kg",
          "value_type": "standard packaging (10/15/20 kg and FIBC options)"
        },
        {
          "parameter": "Minimum order quantity",
          "value": "10",
          "unit": "MT",
          "value_type": "standard; 5 MT 80–100 mesh fine grades"
        },
        {
          "parameter": "Heavy metals / contaminants",
          "value": "per specification",
          "value_type": "guaranteed",
          "note": "Lead and total arsenic limits are declared in the product specification (GB 5009.11 / GB 5009.12)"
        }
      ],
      "microbiological": [
        {
          "parameter": "Total plate count (TPC)",
          "limit": "≤ 10,000",
          "unit": "CFU/g",
          "method": "ISO 4833-1:2013"
        },
        {
          "parameter": "Coliforms",
          "limit": "≤ 10",
          "unit": "CFU/g",
          "method": "ISO 4832:2006"
        },
        {
          "parameter": "Yeast & mould",
          "limit": "≤ 100",
          "unit": "CFU/g",
          "method": "ISO 21527-2:2008"
        },
        {
          "parameter": "Staphylococcus aureus",
          "limit": "≤ 10",
          "unit": "CFU/g",
          "method": "ISO 6888-1:2021"
        },
        {
          "parameter": "Salmonella",
          "limit": "Negative / 25 g",
          "method": "ISO 6579-1:2017"
        },
        {
          "parameter": "Listeria monocytogenes",
          "limit": "Negative / 25 g",
          "method": "ISO 11290-1:2017"
        },
        {
          "parameter": "Aerobic spore formers",
          "limit": "≤ 500",
          "unit": "CFU/g",
          "method": "ISO 7933:2004"
        }
      ]
    }
  ],
  "interpretation": "A guaranteed value is the buyer-facing limit for the specification version in force; a typical value describes normal production; a COA value applies to one delivered lot only. Mesh and micron are not interchangeable without the sieve standard. See /technical-data-governance/.",
  "microbiological_note": "Declared microbiological limits follow the technical datasheets (ISO methods). The specification additionally references Chinese national standard methods (GB 4789) for in-house verification; the ISO-based limits above are the buyer-facing declaration."
}